Flora of North America species comparison

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Callitriche stenoptera

narrow-wing water-starwort
Stem

and leaf scales absent.
Leaves

not connate at base, ± linear tapering from base, 5.9–11.3 × 0.3–1.1 mm, 1-veined.
Inflorescences

bracts absent.
Pedicels

0–0.2 mm in fruit.
Flowers

usually solitary or 1 pistillate and 1 staminate in an axil;

styles reflexed or strongly curved;

pollen colorless.
Schizocarps

0.8–1.2 × 0.9–1.3 mm, as long as or shorter than wide;

mericarps brown or gray-brown, not swollen, winged throughout, wings straight, 0.05–0.1 mm wide, width less than mericarp body.

Callitriche stenoptera
Phenology Flowering Jun–Sep.
Habitat Lakes, pools, ponds, ditches, streams, backwaters.
Elevation 0–3000 m. (0–9800 ft.)
Distribution
from FNA
AZ; CO; ID; MN; MT; NM; OR; UT; WY; AB; BC; NF; ON; SK
[BONAP county map]
Discussion

Callitriche stenoptera most closely resembles C. fassettii and C. hermaphroditica but is distinguished from them by the fruit on which the wing is less than 0.1 mm wide, even at the fruit apex.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 54.
Parent taxa Plantaginaceae > Callitriche
Sibling taxa
C. brutia, C. fassettii, C. hermaphroditica, C. heterophylla, C. longipedunculata, C. marginata, C. palustris, C. pedunculosa, C. peploides, C. stagnalis, C. terrestris, C. trochlearis
Name authority Lansdown: Novon 19: 367, fig. 1. (2009)
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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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

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