familyPotamogetonaceae
genusPotamogeton
speciesPotamogeton pusillus
subspeciesPotamogeton pusillus subsp. gemmiparus
Potamogeton pusillus subsp. gemmiparus
Novon 6: 370. 1996.
Common names: Potamot gemmipare
Basionym: Potamogeton pusillus var. gemmiparus J. W. Robbins in A. Gray, Manual ed. 5, 489. 1867
Synonyms: Potamogeton gemmiparus
Treatment appears in FNA Volume 22.
Revision as of 21:01, 16 December 2019 by FNA>Volume Importer
Leaves: stipules convolute; blade 1.1–6 cm × 0.2–0.7 mm, apex subulate, lacunae present or absent, 0–2 rows on each side of midrib; veins 1. Inflorescences: peduncles 1–3 per plant, cylindric; spikes cylindric, continuous. Fruits obovoid, sides centrally concave; beak median.
Phenology: Flowering and fruiting summer–fall.
Habitat: Acid waters of lakes and streams
Elevation: 0–100 m
Distribution
Que., Conn., Maine, Mass., N.H., N.H., Vt.
Discussion
Potamogeton pusillus subsp. gemmiparus is an uncommon taxon that superficially resembles subsp. pusillus. It can be separated, however, by its continuous inflorescences, whereas those of subsp. pusillus are interrupted.
Selected References
None.
Lower Taxa
None.