Flora of North America species comparison

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Callitriche brutia var. hamulata
Photo is of parent taxon

narrow leaf water-starwort, pedunculate water-starwort
Stem

and leaf scales present.
Leaves

connate at base, ± linear, tapering strongly from near base or spatulate, 5.4–18 × 0.3–3 mm, 1+-veined.
Inflorescences

bracts caducous.
Pedicels

0 mm, rarely less than 2 mm in fruit.
Flowers

usually solitary;

styles reflexed, appressed to ovary;

pollen colorless.
Schizocarps

1.1–1.5(–1.6) × 1.1–1.4 mm, as long as wide;

mericarps blackish, not swollen, winged throughout, wings straight, 0.03–0.3 mm wide.
2n

= 38.

Callitriche brutia var. hamulata
Phenology Flowering Jul–Sep.
Habitat Fast-flowing streams, backwaters, lakes, pools.
Elevation 0–1600 m. (0–5200 ft.)
Distribution
from FNA
OR; WA; BC; Greenland; Europe
[BONAP county map]
Discussion

Variety hamulata is considered native in Greenland and is introduced in other parts of the flora area; the earliest specimen of var. hamulata known from western North America is from Oregon in 1956 (Steward 7238, MO).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 50.
Parent taxa Plantaginaceae > Callitriche > Callitriche brutia
Synonyms C. hamulata, C. intermedia, C. intermedia subsp. hamulata
Name authority (Kützing e× W. D. J. Koch) Lansdown: Watsonia 26: 113. (2006)
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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