Flora of North America species comparison

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Stuckenia striata

broadleaf pondweed, Nevada-pondweed, striped pondweed
Stems

branched distally, terete to 5-ridged, to 200 cm.
Leaves

length and width of those on main stem 2 times or more those on branches;

stipules with stipular sheaths not inflated, 1.2–3.4 cm, ligule 0.2–1.1 cm;

blade linear, 5–21 cm × 0.4–5.1 (–8.5) mm, apex apiculate, cuspidate, or rarely round;

veins 3–5.
Inflorescences

peduncles axillary, rarely terminal, erect to ascending, cylindric, 1.2–5.2 cm;

spikes cylindric, rarely moniliform, 13–45 mm;

verticels 4–9.
Fruits

brown to reddish brown, obovoid to oblanceoloid, 3–3.9 × 2.8–3 mm;

beak toward abaxial margin, erect or rarely recurved to apex, 0.2–0.3 mm.
Chromosome number

apparently unknown.not available.

Stuckenia striata
Phenology Flowering summer–fall.
Habitat Waters of alkaline rivers, canals, and ponds
Elevation 800–2000 m (2600–6600 ft)
Distribution
from FNA
AZ; CA; CO; ID; NM; NV; OR; TX; UT; Mexico; Central America; South America
[BONAP county map]
Discussion

Stuckenia striata is widespread, although not common, in the western United States, extending southward into Argentina and Chile. Potamogeton latifolius [no combination in Stuckenia has been proposed] was accepted by R. F. Thorne (1993b). After examining specimens throughout the range and studying dozens of populations in the field, we have determined that the two names represent the same taxon. We are placing P. latifolius in synonymy.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 22.
Parent taxa Potamogetonaceae > Stuckenia
Sibling taxa
S. filiformis, S. pectinata, S. vaginata
Synonyms Potamogeton striatus, Z &, Potamogeton latifolius
Name authority (Ruiz & Pavon) Holub: Preslia 68: 364. (1997)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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