Index Nominum Algarum Image Index
536 CARD IMAGES
beginning with POLYSIPHONIA Greville
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- POLYSIPHONIA Greville
- POLYSIPHONIA \{also on card: subgenera, sections by J. Agardh, Harvey\}
- POLYSIPHONIA \{also on card: sections by Kützing\}
- POLYSIPHONIA \{also on card: sections by J. Agardh\}
- POLYSIPHONIA \{also on card: sections by Ardissone\}
- POLYSIPHONIA Ardissone \{also on card: sect. of Polysiphonia\}
- POLYSIPHONIA Harvey \{also on card: sub-genus of Polysiphonia\}
- POLYSIPHONIA J. Agardh \{also on card: Subgenus of Polysiphonia\}
- POLYSIPHONIA \{also on card: series Oligosiphonia J. Agardh\}
- POLYSIPHONIA \{also on card: subgenera, series? by J. Agardh\}
- POLYSIPHONIA \{also on card: subgenus Placophora (J. Agardh) Goebel\}
- Polysiphonia abscissa Hook. f. & Harvey
- Polysiphonia abscissa f. microcarpa (J. Hooker & Harvey) Dickie
- Polysiphonia abscissoides Womersley
- Polysiphonia acanthina J. Agardh
- Polysiphonia acanthocarpa Kützing
- Polysiphonia acanthophora Kützing
- Polysiphonia acanthophora Harvey
- Polysiphonia acanthophora var. minor Schiffner
- Polysiphonia acanthotricha Kützing
- Polysiphonia acroblasta Kützing
- Polysiphonia acrolepta Zanardini ex A. De Toni
- Polysiphonia aculeata (Agardh) Montagne in litt.
- Polysiphonia aculeata Kützing
- Polysiphonia aculeifera Zanardini
- Polysiphonia aculeifera Kützing
- Polysiphonia acuminata Gardner
- Polysiphonia adriatica Schiffner
- Polysiphonia adscendens Meneghini
- Polysiphonia adunca Kützing
- Polysiphonia affinis D. Moore
- Polysiphonia agardhiana Greville
- Polysiphonia aggregata Segi
- Polysiphonia akkeshiensis Segi
- Polysiphonia allochroa (Roth) Duby
- Polysiphonia allochroa (Roth) Wallroth
- Polysiphonia allochroa (Roth) Kützing
- Polysiphonia allochroa var. penicillata Rabenhorst
- Polysiphonia amentacea (C. Agardh) Montagne
- Polysiphonia americana Reinsch
- Polysiphonia amethystea Kützing
- Polysiphonia amethystea f. crispa Suringar
- Polysiphonia amoena Sonder
- Polysiphonia amoena Sonder herb.
- Polysiphonia amphibia Harvey
- Polysiphonia amphibolis Womersley
- Polysiphonia angustissima Kützing
- Polysiphonia anisogona J. Hooker & Harvey
- Polysiphonia anomala Hollenberg
- Polysiphonia apiculata Hollenberg
- Polysiphonia aquamara I. A. Abbott
- Polysiphonia arachnoidea (Agardh) Zanardini
- Polysiphonia arachnoidea f. arachnoidea J. Agardh
- Polysiphonia arachnoidea f. humilior [Schiffner]
- Polysiphonia arachnoidea f. melagonium (Meneghini) J. Agardh
- Polysiphonia arachnoidea var. purpurea [Zanardini]
- Polysiphonia arachnoidea var. purpurea (C. Agardh) Zanardini
- Polysiphonia arborescens Kützing
- Polysiphonia arctica J. Agardh
- Polysiphonia arenaria Postels & Ruprecht
- Polysiphonia arenaria Harvey
- Polysiphonia arenaria Kützing
- Polysiphonia arenicola Kützing
- Polysiphonia argentinica Taylor
- Polysiphonia argus Kützing
- Polysiphonia arietina Bailey ms.
- Polysiphonia arietina Bailey in litt.
- Polysiphonia armata J. Agardh
- Polysiphonia adscendens (Bonnemaison) Crouan frat.
- Polysiphonia aspera Zanardini ex A. De Toni
- Polysiphonia asperula Kützing
- Polysiphonia asperula (Kützing) Kützing
- Polysiphonia aterrima J. Hooker & Harvey
- Polysiphonia atlantica Kapraun & J. Norris
- Polysiphonia atra Zanardini
- Polysiphonia atricapilla J. Agardh
- Polysiphonia atrogrisea Sonder in litt.
- Polysiphonia atropurpurea D. Moore
- Polysiphonia atrorubens (Wahlenberg) Endlicher
- Polysiphonia atrorubescens ('atro-rubescens') (Dillwyn) Greville
- Polysiphonia atrorubescens var. agardhiana (Greville) Le Jolis
- Polysiphonia atrorubescens var. minor W.H. Harvey
- Polysiphonia atrorubescens ('atro-rubescens') (Dillwyn) Greville f. psammicola Tilden
- Polysiphonia attenuata Zanardini
- Polysiphonia attenuata Zanardini ex A. Ee Toni
- Polysiphonia aurantiaca Kützing
- Polysiphonia aurata Harvey
- Polysiphonia australiensis Womersley
- Polysiphonia australis (Agardh) J. Agardh
- Polysiphonia awabiensis Noda
- Polysiphonia azorica O.C. Schmidt
- Polysiphonia badia (Dillwyn) Sprengel
- Polysiphonia badia var. funicularis (Meneghini) Kützing
- Polysiphonia baileyi (Harvey) J. Agardh
- Polysiphonia bajacali Hollenberg
- Polysiphonia balanicola Falkenberg
- Polysiphonia bambusina Meneghini
- Polysiphonia bangii (Kützing) Kützing
- Polysiphonia barbatula Kützing
- Polysiphonia bartlingiana Kützing
- Polysiphonia baxteri Lucas
- Polysiphonia beaudettei Hollenberg
- Polysiphonia beguinotii Schiffner
- Polysiphonia bellula De Notaris
- Polysiphonia bellula De Notaris
- Polysiphonia berkeleyi (Mont.) J. Hooker & Harvey
- Polysiphonia berkeleyi var. davisii (J. Hooker & Harvey) J. Hooker & Harvey
- Polysiphonia berkeleyi var. davisii (J. Hooker & Harvey) Harvey
- Polysiphonia bharadwajae Sreenivasa Rao
- Polysiphonia biasolettiana Zanardini
- Polysiphonia bicornis Sonder
- Polysiphonia bicornis Ohta
- Polysiphonia biformis Zanardini
- Polysiphonia biformis Zanardini
- Polysiphonia bifurcata Hollenberg
- Polysiphonia binderi Bonder
- Polysiphonia binderi (J. Agardh) Goebel
- Polysiphonia binneyi Harvey
- Polysiphonia binneyi Harvey
- Polysiphonia bipinnata Postels & Ruprecht
- Polysiphonia bipinnata Kützing
- Polysiphonia bipinnata var. gemmifera (Ruprecht) J. Agardh
- Polysiphonia bipinnata var. tenuior J. Agardh
- Polysiphonia blandii ('blandi') Harvey
- Polysiphonia blandii ('Blandi') Harvey
- Polysiphonia boergesenii Baardseth
- Polysiphonia boldii Wynne & Edwards
- Polysiphonia bostrychioides Montagne
- Polysiphonia bostrichioides Crouan fr.
- Polysiphonia botryocarpa J. Hooker & Harvey
- Polysiphonia brachygona Harvey
- Polysiphonia breviarticulata (C. Agardh) Zanardini
- Polysiphonia breviarticulata var. adriatica Kützing
- Polysiphonia breviarticulata var. chrysoderma (Kützing) Schiffner
- Polysiphonia breviarticulata var. mexicana Kützing
- Polysiphonia brevisegmenta Womersley
- Polysiphonia brodiei ('Brodiaei') Zanardini ex A. De Toni
- Polysiphonia brodiei ('Brodiaei') (Dillwyn) Sprengel
- Polysiphonia brodiei f. typica Holmes & Batters \{also on card: f. densa Holmes & Batters\}
- Polysiphonia brodiei f. agardhii Kjellman
- Polysiphonia brodiei var. angustissima H. Van Heurck
- Polysiphonia brodiei f. kuetzingii Kjellman
- Polysiphonia brodiei var. confluens Kjellman
- Polysiphonia brodiei f. lyngbyei Kjellman
- Polysiphonia brodiei var. laxa Kjellman
- Polysiphonia brodiei var. subsimplex ('sub-simplex') Harvey
- Polysiphonia brodiei var. tingitana Bornet
- Polysiphonia bulbosa Suhr mscr.
- Polysiphonia bulbosa Suhr in litt.
- Polysiphonia byssacea Kützing
- Polysiphonia byssacea (Kützing) Kützing
- Polysiphonia byssoclados Harvey
- Polysiphonia byssoides (Goodenough & Woodward) Greville
- Polysiphonia byssoides (Goodenough & Woodward) Sprengel
- Polysiphonia byssoides var. asperula Kützing
- Polysiphonia byssoides var. bangii Kützing
- Polysiphonia byssoides var. byssacea Kützing
- Polysiphonia byssoides var. dasyiformis ('dasyaeformis') Kützing
- Polysiphonia byssoides var. dillwynii Kützing
- Polysiphonia byssoides var. lyngbyei Kützing
- Polysiphonia byssoides var. solieri ('solierii') (J. Agardh) Ardissone
- Polysiphonia byssoides var. vaga Kützing
- Polysiphonia caespitosa (Pocock) Hollenberg
- Polysiphonia caespitula Sonder
- Polysiphonia calacantha Harvey
- Polysiphonia californica Harvey
- Polysiphonia californica var. plumigera W. H. Harvey
- Polysiphonia calliptera Kützing
- Polysiphonia callithamnioides Crouan frat.
- Polysiphonia callithamnium Sonder
- Polysiphonia callitricha Kützing
- Polysiphonia calodictyon Harvey
- Polysiphonia calodictyon Harvey
- Polysiphonia calodictyon var. condensata Kützing in Herb.
- Polysiphonia calothrix Harvey
- Polysiphonia calothrix Harvey
- Polysiphonia camerunensis Pilger
- Polysiphonia campanulata Chiaje
- Polysiphonia camptoclada Montagne
- Polysiphonia cancellata Harvey
- Polysiphonia capillata De Notaris
- Polysiphonia capillata De Notaris, inval.
- Polysiphonia capucina Crouan fr.
- Polysiphonia carettia Hollenberg
- Polysiphonia carmichaeliana Harvey
- Polysiphonia carnea Kützing ms.
- Polysiphonia carnea Kützing in litt.
- Polysiphonia cartilaginea Zanardini mscr. in herb.
- Polysiphonia caspia Kützing orth. mut.
- Polysiphonia caspica Kützing
- Polysiphonia castagnei Kützing
- Polysiphonia castelliana De Notaris & Dufour
- Polysiphonia caulescens J. Agardh
- Polysiphonia ceramiiformis_('ceramiaeformis') Crouan frat.
- Polysiphonia ceratoclada Montagne
- Polysiphonia ceratoclada var. secundata J. Hooker & Harvey
- Polysiphonia cervicornis Kützing
- Polysiphonia chalarophloea Kützing
- Polysiphonia chlamydopteris Zanardini
- Polysiphonia chlamydopteris Meneghini ex A. De Toni
- Polysiphonia chrysoderma Kützing
- Polysiphonia cladorrhiza Ardissone
- Polysiphonia cladostephus Montagne
- Polysiphonia clathrata Suhr in herb.
- Polysiphonia clavigera Kützing
- Polysiphonia clevelandii Farlow mscr.
- Polysiphonia clevelandii Farlow
- Polysiphonia clevelandii Farlow ms.
- Polysiphonia cloiophylla (C. Agardh) J. Agardh
- Polysiphonia cloiophylla f. contigua J. Agardh
- Polysiphonia cloiophylla f. corymbosa (Kützing) J. Agardh
- Polysiphonia cloiophylla f. patens J. Agardh
- Polysiphonia cloiophylla f. pectinata J. Agardh
- Polysiphonia coacta Tseng
- Polysiphonia coarctata Kützing
- Polysiphonia coccinea (Hudson) Sprengel
- Polysiphonia codicola Zanardini
- Polysiphonia codiicola Zanardini
- Polysiphonia cokeri Hollenberg
- Polysiphonia colensoi J. D. Hooker & Harvey
- Polysiphonia colensoi Hooker & Harvey
- Polysiphonia collabens (C. Agardh) J. Agardh
- Polysiphonia collabens var. platyspira (Kützing) Ardissone
- Polysiphonia collinsii Hollenberg
- Polysiphonia collinsii G. J. Hollenberg
- Polysiphonia collinsii var. luxurians G. J. Hollenberg
- Polysiphonia collinsii var. deliquescens G. J. Hollenberg
- Polysiphonia collinsii var. compacta G. J. Hollenberg
- Polysiphonia comatula Kützing
- Polysiphonia comatula var. penicillifera Kützing
- Polysiphonia commutata Kützing
- Polysiphonia commutata Endlicher
- Polysiphonia comoides Harvey
- Polysiphonia comosa (C. Agardh) Endlicher
- Polysiphonia comosa Kützing
- Polysiphonia comosa var. penicillifera Kützing
- Polysiphonia compacta Lucas
- Polysiphonia complanata (C. Agardh) Sprengel
- Polysiphonia complanata (Clemente) J. Agardh
- Polysiphonia concinna G.J. Hollenberg
- Polysiphonia condensata Kützing
- Polysiphonia confinis J. Hooker & Harvey ined.
- Polysiphonia confusa Hollenberg
- Polysiphonia constricta Womersley
- Polysiphonia corallicola Grunow
- Polysiphonia corallioides Suhr ex Kützing
- Polysiphonia corinaldii 'Meneghini'
- Polysiphonia corinaldii (Meneghini) De Notaris
- Polysiphonia corymbifera (C. Agardh) Endlicher
- Polysiphonia corymbosa J. Agardh
- Polysiphonia crassa Okamura
- Polysiphonia crassicollis Børgesen
- Polysiphonia crassiuscula Harvey
- Polysiphonia cristata Harvey
- Polysiphonia curta Montagne
- Polysiphonia curta Montagne ex Kützing
- Polysiphonia cuspidata J. Agardh
- Polysiphonia cymosa Kützing
- Polysiphonia cystophyllicola Noda
- Polysiphonia cystophyllicola Noda
- Polysiphonia dalmatica Kützing in litt.
- Polysiphonia dalmatica Meneghini
- Polysiphonia dasiiformis ('Dasiaeformis') Zanardini
- Polysiphonia dasyiformis ('dasyaeformis') (Kützing) Zanardini
- Polysiphonia dasyiformis ('dasyaeformis') Crouan fr.
- Polysiphonia dasyoides Zanardini
- Polysiphonia daveyae Reinbold
- Polysiphonia davisii J. Hooker & Harvey
- Polysiphonia decipiens Montagne
- Polysiphonia decipiens De Notaris
- Polysiphonia decumbens Segi
- Polysiphonia decussata Hollenberg
- Polysiphonia delicatula Hollenberg
- Polysiphonia delphina De Notaris
- Polysiphonia delphina De Notaris
- Polysiphonia deludens Falkenberg
- Polysiphonia dendritica (Agardh) Montagne
- Polysiphonia dendroidea Montagne
- Polysiphonia denticulata Chiaje
- Polysiphonia denticulata Kützing
- Polysiphonia denudata (Dillw.) Greville \{also on card, after Greville: ex Harvey?\}
- Polysiphonia derbesii Solier ex Kützing
- Polysiphonia derbesii f. penicillata J. Agardh
- Polysiphonia derbesii f. spinulosa (C. Agardh) J. Agardh
- Polysiphonia deschampsii (Agardh) Crouan frat.
- Polysiphonia deusta (Roth) Sprengel
- Polysiphonia deusta f. deusta J. Agardh
- Polysiphonia deusta f. nodulosa (J. Agardh) J. Agardh
- Polysiphonia devoniensis C.A. Maggs & M.H. Hommersand
- Polysiphonia dichocephala Kützing
- Polysiphonia dichotoma Kützing
- Polysiphonia dichotoma Zanardini ex A. De Toni
- Polysiphonia dichotoma G.J. Hollenberg
- Polysiphonia dictyurus J. Agardh
- Polysiphonia dictyura Liebmann ex Kützing
- Polysiphonia dictyurus var. clevelandii 'Farlow'
- Polysiphonia diffusa (Hudson) Jones & Kingston
- Polysiphonia dilatata Kützing
- Polysiphonia dillwynii Kützing
- Polysiphonia dillwynii (Kützing) Kützing
- Polysiphonia discolor (Agardh) Sprengel
- Polysiphonia disticha Zanardini
- Polysiphonia divaricata Carmichael mss.
- Polysiphonia divaricata (Agardh) Sprengel
- Polysiphonia divergens J. Agardh
- Polysiphonia divergens var. grevilleana Kützing
- Polysiphonia divergens var. heteronema J. Agardh
- Polysiphonia dotyi Hollenberg
- Polysiphonia doubletiae Sauvageau
- Polysiphonia dubia Suhr in herb. Berol.
- Polysiphonia dubia var. imbricata Suhr in herb. Berol.
- Polysiphonia dumosa Hook. f. & Harvey
- Polysiphonia durkeei Harvey ms.
- Polysiphonia dysanophora Kützing
- Polysiphonia eastwoodiae ('Eastwoodae') Setchell & Gardner
- Polysiphonia echigoensis Noda
- Polysiphonia echigoensis Noda
- Polysiphonia echinata Harvey
- Polysiphonia elongata (Hudson) Sprengel
- Polysiphonia elongata Kützing
- Polysiphonia elongata f. typica Kylin
- Polysiphonia elongata var. arborescens (Kützing) Ardissone
- Polysiphonia elongata f. arborescens (Kützing) Ardissone
- Polysiphonia elongata var. arborescens (Kützing) [Schiffner]
- Polysiphonia elongata f. baltica Rosenvinge
- Polysiphonia elongata var. denudata Harvey
- Polysiphonia elongata var. denudata [Zanardini]
- Polysiphonia elongata var. denudata (Agardh) Zanardini
- Polysiphonia elongata var. denudata Montagne
- Polysiphonia elongata f. denudata (J. Agardh) Batters
- Polysiphonia elongata var. haematites (Kützing) [Schiffner]
- Polysiphonia elongata f. inflata Ercegovic
- Polysiphonia elongata f. lyngbyei (Agardh) J. Agardh
- Polysiphonia elongata var. autumnalis J. Agardh
- Polysiphonia elongata var. expansa (Agardh) J. Agardh \{also on card, before var.: f. lyngbyei\}
- Polysiphonia elongata var. luxurians (Agardh) J. Agardh \{also on card, before var.: f. lyngbyei\}
- Polysiphonia elongata var. prolifera J. Agardh
- supplanted
- supplanted
- Polysiphonia elongata var. vernalis J. Agardh \{also on card, before var.: f. lyngbyei\}
- Polysiphonia elongata var. microdendron (J. Agardh) Gran
- Polysiphonia elongata f. microdendron Levring
- Polysiphonia elongata f. glomerata Gran
- Polysiphonia elongata subf. glomerata Levring
- Polysiphonia elongata f. nana Gran
- Polysiphonia elongata var. prolifera [Zanardini]
- Polysiphonia elongata var. prolifera (Agardh) Zanardini
- Polysiphonia elongata var. robustissima Zanardini
- Polysiphonia elongata f. rosea (Greville) Batters
- Polysiphonia elongata f. ruchingeri (Agardh) J. Agardh
- Polysiphonia elongata var. denudata (Harvey) J. Agardh
- Polysiphonia elongata var. hornotina J. Agardh
- Polysiphonia elongata f. minor [Schiffner]
- Polysiphonia elongata var. penicilligara J. Agardh
- Polysiphonia elongata var. rosea (Greville) J. Agardh
- Polysiphonia elongata var. sanguinolenta (C. Agardh) Harvey
- Polysiphonia elongata f. schuebeleri ('schuebelerii') (Foslie) Rosenvinge
- Polysiphonia elongata var. simplex (Hudson) Sprengel
- Polysiphonia elongata var. spinulosa [Zanardini]
- Polysiphonia elongata var. spinulosa (Agardh) Zanardini
- Polysiphonia elongella Harvey
- Polysiphonia elongella Meneghini
- Polysiphonia episcopalis Zanardini
- Polysiphonia episcopalis Zanardini mscr.
- Polysiphonia episcopalis Zanardini ex A. De Toni
- Polysiphonia ericoides Harvey
- Polysiphonia erythraea J. Agardh
- Polysiphonia erythrocoma Kützing
- Polysiphonia exigua Kützing
- Polysiphonia exilis Harvey
- Polysiphonia exilis Kützing
- Polysiphonia expansa (Agardh) Endlicher
- Polysiphonia expansa Zanardini
- Polysiphonia falcata Kützing
- Polysiphonia fasciculata Harvey ex D. Moore
- Polysiphonia fasciculata Kützing
- Polysiphonia fasciculifera Kützing
- Polysiphonia fastigiata (Roth) Greville
- Polysiphonia fastigiata (Roth) Sprengel
- Polysiphonia ferox J. Agardh
- Polysiphonia ferulacea Suhr ex J. Agardh
- Polysiphonia ferulacea f. implicata Tseng
- Polysiphonia fibrata (Dillwyn) Harvey
- Polysiphonia fibrillosa (Dillwyn) Sprengel
- Polysiphonia fibrillosa var. spinifera J. Agardh
- Polysiphonia figariana Zanardini
- Polysiphonia filamentosa (Wulfen) Sprengel
- Polysiphonia filipendula Harvey ex J. Agardh
- Polysiphonia filipendula Harvey
- Polysiphonia firma Zanardini
- Polysiphonia flabelliformis J. Hooker & Harvey
- Polysiphonia flabellulata Harvey
- Polysiphonia flaccida Rabenhorst
- Polysiphonia flaccidissima G.J. Hollenberg
- Polysiphonia flaccidissima var. decimera Hollenberg
- Polysiphonia flaccidissima var. iki Hollenberg
- Polysiphonia flaccidissima var. lopi Hollenberg
- Polysiphonia flaccidissima var. smithii Hollenberg
- Polysiphonia flagellifera Reinsch
- Polysiphonia flavescens Zanardini
- Polysiphonia flexella (C. Agardh) J. Agardh
- Polysiphonia flexella var. acanthotricha (Kützing) Piccone
- Polysiphonia flexella var. genuina [Schiffner]
- Polysiphonia flexella var. subverticillata Strafforello
- Polysiphonia flexicaulis (Harv.) Collins
- Polysiphonia floccosa Zanardini
- Polysiphonia flocculosa (C. Agardh) Endlicher
- Polysiphonia foeniculacea (C. Agardh) Sprengel
- Polysiphonia foeniculacea var. eximia Schiffner
- Polysiphonia foeniculacea var. genuina [Schiffner]
- Polysiphonia foeniculacea var. lagunarum Schiffner
- Polysiphonia foetidissima Cocks
- Polysiphonia foetidissima Cocks
- Polysiphonia foetidissima Cocks
- Polysiphonia forcipata J. Agardh
- Polysiphonia forcipata Harvey
- Polysiphonia forcipata Harvey
- Polysiphonia forfex Harvey
- Polysiphonia formosa (Suhr) Harvey
- Polysiphonia fracta Harvey
- Polysiphonia fracta Harvey
- Polysiphonia fragilis Suringar
- Polysiphonia fragilis Shperk
- Polysiphonia frutex Harvey
- Polysiphonia fruticulosa (Wulfen) Sprengel
- Polysiphonia fruticulosa var. genuina Bornet
- Polysiphonia fruticulosa var. pilosissima Schiffner
- Polysiphonia fruticulosa var. tenuior [Zanardini]
- Polysiphonia fruticulosa var. tenuior (Agardh) Zanardini
- Polysiphonia fruticulosa var. tenuissima H. Van Heurck
- Polysiphonia fruticulosa var. wulfenii ('wulfeni') (Roth) [Rodríguez y Femenías]
- Polysiphonia fruticulosa var. wulfenii Bornet
- Polysiphonia fruticulosa f. pusilla Bornet
- Polysiphonia fucoides (Hudson) Greville
- Polysiphonia fuliginosa Rudolphi
- Polysiphonia fuliginosa Kützing
- Polysiphonia fuliginosa Suhr
- Polysiphonia funebris De Notaris
- Polysiphonia funebris De Notaris ex J. Agardh
- Polysiphonia funebris De Notaris in herb. Lenormand
- Polysiphonia funicularis Meneghini
- Polysiphonia funicularis (Meneghini ex Kützing) Kützing
- Polysiphonia funicularis Meneghini mscr.
- Polysiphonia furcata Meneghini ex A. De Toni
- Polysiphonia furcellata (C. Agardh) Harvey
- Polysiphonia furcellata f. forcipata (J. Agardh) J. Agardh
- Polysiphonia furcellata var. forcipata (J. Agardh) Ardissone
- Polysiphonia furcellata f. patula J. Agardh
- Polysiphonia furcellata var. patula (J. Agardh) [Piccone]
- Polysiphonia fuscescens Harvey
- Polysiphonia fuscorubens ('fusco-rubens') J. Hooker & Harvey
- Polysiphonia gardneri Kylin
- Polysiphonia gaudichaudii (C. Agardh) Kützing
- Polysiphonia gelidii Zanardini
- Polysiphonia gemmifera Yates
- Polysiphonia gibbesii Harvey
- Polysiphonia giraudii Derb. & Sol.
- Polysiphonia glomerulata (Agardh) Sprengel
- Polysiphonia gonatophora Kützing
- Polysiphonia gonatophora var. rigidula Kützing
- Polysiphonia gopnathensis Thivy & Rao
- Polysiphonia gorgoniae Harvey
- Polysiphonia gracilis Greville mss.
- Polysiphonia gracilis Crouan frat.
- Polysiphonia gracilis Shperk
- Polysiphonia gracilis Tseng
- Polysiphonia grateloupeoides Noda
- Polysiphonia grevillei ('grevillii') Harvey
- Polysiphonia griffithsiana Harvey
- Polysiphonia grisea Kützing
- Polysiphonia guadalupensis Setchell & Gardner
- Polysiphonia guernisacii_('Guernisaci') (Crouan) J. Agardh
- Polysiphonia gunniana Harvey
- Polysiphonia haematites Kützing
- Polysiphonia hakodatensis Yendo
- Polysiphonia hamulifera Kützing
- Polysiphonia hancockii Dawson
- Polysiphonia hapalacantha Harvey
- Polysiphonia haplodasyae Womersley
- Polysiphonia harlandii Harvey
- Polysiphonia harlandii f. minutissima Tseng
- Polysiphonia harlandii f. typica Tseng
- Polysiphonia harveyi Bailey
- Polysiphonia harveyi var. arietina Harvey
- Polysiphonia harveyi var. olneyi (Harvey) Collins
- Polysiphonia hassleri Taylor
- Polysiphonia havanensis Montagne
- Polysiphonia havanensis f. binneyi (Harvey) J. Agardh
- Polysiphonia havanensis f. havanensis J. Agardh
- Polysiphonia havanensis f. insidiosa J. Agardh
- Polysiphonia havanensis f. mucosa J. Agardh
- Polysiphonia hawaiiensis Hollenberg
- Polysiphonia hemisphaerica J. E. Areschoug
- Polysiphonia hemisphaerica var. boldii (Wynne & Edwards) J. Rueness
- Polysiphonia hendryi Gardner
- Polysiphonia hendryi var. compacta (Hollenberg) Hollenberg
- Polysiphonia hendryi var. deliquescens (Hollenberg) Hollenberg
- Polysiphonia hendryi var. gardneri (Kylin) Hollenberg
- Polysiphonia hendryi var. luxurians (Hollenberg) Hollenberg
- Polysiphonia heringii Harvey
- Polysiphonia herpa G.J. Hollenberg
- Polysiphonia heteroclada J. Agardh
- Polysiphonia hillebrandii Bornet
- Polysiphonia hirsuta (Roth) Wallroth
- Polysiphonia hirsuta Zanardini
- Polysiphonia hirta J. Agardh
- Polysiphonia hispida f. vestita (J. Agardh) Hauck
- Polysiphonia hochstetteriana O.C. Schmidt
- Polysiphonia homoia Setchell & Gardner
- Polysiphonia hookeri Harvey
- Polysiphonia hooperi Bailey ms.
- Polysiphonia howei Hollenberg
- Polysiphonia humilis Kützing
- Polysiphonia hypnoides Welwitsch
- Polysiphonia hystrix J. Hooker & Harvey
- Polysiphonia implexa J. Hooker & Harvey
- Polysiphonia implexa J. Hooker & Harvey
- Polysiphonia impolita Zanardini
- Polysiphonia incompa De Notaris, inval.
- Polysiphonia incompta De Notaris, inval.
- Polysiphonia incompta Harvey
- Polysiphonia inconspicua Reinsch
- Polysiphonia inconspicua G.J. Hollenberg
- Polysiphonia incurva Zanardini
- Polysiphonia indigena Hollenberg
- Polysiphonia infestans Harvey
- Polysiphonia infestans Harvey
- Polysiphonia inflata V. Martens
- Polysiphonia insidiosa Crouan frat.
- Polysiphonia insidiosa Greville ex J. Agardh
- Polysiphonia insignis Crouan frat.
- Polysiphonia intricata (C. Agardh) J. Agardh
- Polysiphonia intricata var. crassa Ardissone
- Polysiphonia intricata var. simplicior J. Agardh
- Polysiphonia inversa Sonder
- Polysiphonia irregularis Zanardini [mscr.]
- Polysiphonia irregularis Zanardini mscr.
- Polysiphonia isogona Harvey