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Beckmannia syzigachne
AMERICAN SLOUGH GRASS


Higher Taxonomy
Family: Poaceae (Gramineae)View Description 
Common Name: GRASS FAMILY
Habit: Annual to woody perennial herb; roots generally fibrous. Stem: generally round, hollow; nodes swollen, solid. Leaf: alternate, 2-ranked, generally linear, parallel-veined; sheath generally open; ligule membranous or hairy, at blade base. Inflorescence: various (of generally many spikelets). Spikelet: glumes generally 2; florets (lemma, palea, flower) 1--many; lemma generally membranous, sometimes glume-like; palea generally +- transparent, +- enclosed by lemma. Flower: generally bisexual, minute; perianth vestigial; stamens generally 3; stigmas generally 2, generally plumose. Fruit: grain, sometimes achene- or utricle-like.
Genera In Family: 650--900 genera; +- 10550 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials). Note: Generally wind-pollinated. Achnatherum, Ampelodesmos, Hesperostipa, Nassella, Piptatherum, Piptochaetium, Ptilagrostis moved to Stipa; Elytrigia, Leymus, Pascopyrum, Pseudoroegneria, Taeniatherum to Elymus; Hierochloe to Anthoxanthum; Lolium, Vulpia to Festuca; Lycurus to Muhlenbergia; Monanthochloe to Distichlis; Pleuraphis to Hilaria; Rhynchelytrum to Melinis. The following taxa (in genera not included here), recorded in California from historical collections or reported in literature, are extirpated, lacking vouchers, or not considered naturalized: Acrachne racemosa (Roth) Ohwi, Allolepis texana (Vasey) Soderstr. & H.F. Decker, Amphibromus nervosus (Hook. f.) Baill., Axonopus affinis Chase, Axonopus fissifolius (Raddi) Kuhlm., Coix lacryma-jobi L., Cutandia memphitica (Spreng.) K. Richt., Dinebra retroflexa (Vahl) Panz., Eremochloa ciliaris (L.) Merr., Eustachys distichophylla (Lag.) Nees, Gaudinia fragilis (L.) P. Beauv., Miscanthus sinensis Andersson, Neyraudia arundinacea (L.) Henrard, Phyllostachys aurea Rivière & C. Rivière, Phyllostachys bambusoides Siebold & Zuccarini, Rottboellia cochinchinensis (Lour.) Clayton, Schedonnardus paniculatus (Nutt.) Branner & Coville, Schizachyrium cirratum (Hack.) Wooton & Standl., Schizachyrium scoparium (Michx.) Nash, Themeda quadrivalvis (L.) Kuntze, Thysanolaena latifolia (Hornem.) Honda, Tribolium obliterum (Hemsl.) Renvoize, Zea mays L., Zizania palustris L. var. interior (Fassett) Dore, Zoysia japonica Steud. Paspalum pubiflorum E. Fourn., Paspalum quadrifarium Lam., are now reported for southern California (J Bot Res Inst Texas 4:761--770). See Glossary p. 30 for illustrations of general family characteristics.
eFlora Treatment Author: James P. Smith, Jr., except as noted
Scientific Editor: James P. Smith, Jr., J. Travis Columbus, Dieter H. Wilken.
Genus: BeckmanniaView Description 


Habit: Annual [rhizomatous perennial herb]. Stem: generally erect, 2--12(15) dm. Leaf: cauline; sheath glabrous, ribbed; ligule membranous, acute, entire or irregularly cut; blade flat, glabrous. Inflorescence: panicle-like; branches short, spike-like, ascending to appressed; spikelets 2-ranked, overlapping. Spikelet: +- round in outline; glumes +- equal, strongly laterally compressed, > adjacent lemmas, round to obovate in side view, keeled, wrinkled, 3-veined; axis breaking below glumes, falling as 1 unit; florets 1--2, bisexual or upper reduced; lemma 5-veined, acuminate, awn 0; palea narrow, +- = lemma.
Species In Genus: 2 species: North America, Eurasia. Etymology: (J. Beckmann, German botanist, 1739--1811)
eFlora Treatment Author: James P. Smith, Jr.
Reference: Hatch 2007 FNANM 24:484--486
Unabridged Reference: Reeder 1953 Bull Torrey Bot Club 80:187--196
Beckmannia syzigachne (Steud.) Fernald
NATIVE
Habit: Annual, tufted. Stem: 2--12 dm. Leaf: ligule 4--11 mm, pubescent; blade 6--21 cm, 4--10(20) mm wide, flat, scabrous. Inflorescence: 7--30 cm, narrow, +- dense; branches 1-sided, generally 1--2 cm, ascending to appressed. Spikelet: 2--3 mm; glumes prominently keeled, glabrous to finely scabrous, tip short-pointed; floret 1; lemma 2--3 mm, lanceolate, acuminate, awn 0; palea +- equal lemma, acute. Chromosomes: 2n=14.
Ecology: Margins of ponds, streams, marshes; Elevation: < 2000 m. Bioregional Distribution: NW, CaR, n SN, ScV, n CCo, SnFrB, MP, n SNE; Distribution Outside California: most of North America, except southeastern United States. Flowering Time: May--Jul Note: Used for forage.
Synonyms: Beckamannia syzigachne subsp. baicalensis (Kusn.) Hultén
Jepson eFlora Author: James P. Smith, Jr.
Reference: Hatch 2007 FNANM 24:484--486
Unabridged Reference: Reeder 1953 Bull Torrey Bot Club 80:187--196
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Botanical illustration including Beckmannia syzigachne

botanical illustration including Beckmannia syzigachne

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Citation for this treatment: James P. Smith, Jr. 2012, Beckmannia syzigachne, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=15549, accessed on July 21, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on July 21, 2019.

Beckmannia syzigachne
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© 2005 Steve Matson
Beckmannia syzigachne
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© 2010 Vernon Smith
Beckmannia syzigachne
click for enlargement
© 2015 Steve Matson
Beckmannia syzigachne
click for enlargement
© 2015 Steve Matson
Beckmannia syzigachne
click for enlargement
© 2005 Steve Matson
Beckmannia syzigachne
click for enlargement
© 2015 Steve Matson

More photos of Beckmannia syzigachne in CalPhotos



Geographic subdivisions for Beckmannia syzigachne:
NW, CaR, n SN, ScV, n CCo, SnFrB, MP, n SNE
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).





 

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Duplicates counted once; synonyms included.
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Blue line denotes eFlora flowering time.