familyPotamogetonaceae
genusPotamogeton
speciesPotamogeton pusillus
subspeciesPotamogeton pusillus subsp. gemmiparus
Potamogeton pusillus subsp. gemmiparus
Novon 6: 370. 1996.
Common names: Potamot gemmipare
Endemic
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.
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.
"shortened" is not a number."not elongating" is not a number."less" is not a number.
... more about "Potamogeton pusillus subsp. gemmiparus"
dehiscing +
distinct +
subulate +
perfoliate +
not clasping +
not corrugate +
tapering +
erect +
median +
0.1;0.6 +
translucent +
not arcuate +
elliptic;ovate +
leathery +
Potamot gemmipare +
coiled +
curved +
absent +
bisexual +
sessile +
beaked +
obovoid +
absent +
unbranched +
sheathing +
projecting +
unmodified +
oriented +
rolled +
shortened +
absent +
sessile +
delicate +
floating +
submersed +
coarse +
vegetative +
free +
not crispate +
orthotropous +
marginal +
not pedunculate +
not spiraling +
stiff +
not dimorphic +
recurved;erect +
cylindric +
spheric +
Novon +
1996 +
absent +
0;5 +
ligulate +
circular +
not persisting +
longer +
concave +
Endemic +
continuous +
capitate +
not dimorphic +
cylindric +
epitepalous +
sheathing +
compressed;terete +
not ligulate +
convolute +
length +
persistent +
inconspicuous +
tubular +
fusiform +
hardened +
Potamogeton pusillus subsp. gemmiparus +
Potamogeton pusillus +
subspecies +
fibrous +
absent +
absent +
common +
divided +