Common Name: PONDWEED FAMILY Habit: Annual, perennial herb, aquatic, (generally fresh to alkaline), glabrous, from rhizomes, tubers, or winter buds. Stem: erect, simple to branched, cylindric to compressed, rooting at lower nodes; nodal glands present or not. Leaf: simple, cauline, alternate or in subopposite pairs; submersed thread-like to round, sessile or petioled; floating present or not, elliptic to ovate, petioled, leathery; sheath open, continuous with petiole or +- free from blade base, generally stipuled, stipules fused and ligule-like or not. Inflorescence: spike, cylindric to spheric, axillary or terminal, generally emergent, peduncled; bracts 0. Flower: inconspicuous, bisexual; perianth parts [0]4, clawed, +- green, limb generally adaxially concave; stamens [2]4, each fused to base of perianth part [or not], filament generally 0 [short, wide], anthers open to outside; pistils [1]4, ovary 1-chambered, ovule 1, attached to chamber base, style 0 or short. Fruit: drupe, generally obovate, sessile. Seed: 1. Genera In Family: 3 genera, +- 95 species: worldwide. Note: Recently treated elsewhere to include Zannichelliaceae. Ruppia moved to Ruppiaceae. eFlora Treatment Author: C. Barre Hellquist, Robert F. Thorne & Robert R. Haynes Scientific Editor: Thomas J. Rosatti.
NATIVE Habit: Tubered, rhizomes matted. Stem: < 80 cm, branches many, +- cylindric. Leaf: < 15(35) cm, 0.2--1 mm wide, generally thread-like, tip acute or with abrupt, short to medium-long point; stipules 2--5 cm, sheaths not inflated. Inflorescence: axillary or terminal, interrupted in fruit, 14--22 mm, whorls 2--6; peduncle 4.5--11.4 cm. Fruit: 2.5--5 mm, beak conspicuous. Ecology: Common. Ponds, lakes, marshes, streams; Elevation: < 2400 m. Bioregional Distribution: CA; Distribution Outside California: worldwide. Flowering Time: May--Jul Note: Often weedy in reservoirs, irrigation canals; important food for waterfowl. Synonyms: Coleogeton pectinatus (L.) Les & R.R. Haynes; Potamogeton pectinatus L. Jepson eFlora Author: C. Barre Hellquist, Robert F. Thorne & Robert R. Haynes Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Previous taxon: Stuckenia filiformis subsp. alpina Next taxon: Stuckenia striata
Botanical illustration including Stuckenia pectinata
Citation for this treatment: C. Barre Hellquist, Robert F. Thorne & Robert R. Haynes 2012, Stuckenia pectinata, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=80429, accessed on March 18, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on March 18, 2024.
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(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).
Data provided by the participants of the
Consortium of California Herbaria.
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Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month
Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).