Flora of North America species comparison

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Callitriche trochlearis

Callitriche longipedunculata

effluent water-starwort, water starwort, wheel fruit water-starwort

longstock water-starwort
Stem

and leaf scales present.

and leaf scales present.
Leaves

connate at base, ± parallel-sided, 5.2–9.1 × 0.1–0.9 mm, 1+-veined.

connate at base, spatulate, 2.8–5 × 1.8–3.3 mm, 1+-veined.
Inflorescences

bracts persistent.

bracts caducous.
Pedicels

0–0.5 mm in fruit.

0–25 mm in fruit.
Flowers

usually 1 staminate and 1 pistillate in each axil;

styles spreading;

pollen yellow.

usually 1 staminate and 1 pistillate in 1 axil opposed by 1(+) pistillate;

styles erect and spreading to recurved;

pollen yellow.
Schizocarps

1–1.2 × 1.1–1.3 mm, ± as long as wide;

mericarps black, not swollen, evenly winged throughout, wings straight, 0.05–0.1 mm wide.

0.9–1.4 × 0.8–1.2 mm, as long as or longer than wide;

mericarps black, not swollen, evenly winged throughout, wings straight, 0.03–0.1 mm wide.
2n

= 40.

Callitriche trochlearis

Callitriche longipedunculata
Phenology Flowering Apr–Jul. Flowering Mar–May.
Habitat Vernal and perennial pools, ditches. Vernal pools.
Elevation 0–2000 m. (0–6600 ft.) 0–700 m. (0–2300 ft.)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Callitriche trochlearis occurs in northwestern and central-western California plus western Oregon.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Callitriche longipedunculata is known from most of California, including the Inner North Coast Ranges, Cascade Range Foothills, Great Central Valley, San Francisco Bay Area, and western Pensisular Ranges (R. V. Lansdown and R. E. Preston, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=16691).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 54. FNA vol. 17, p. 52.
Parent taxa Plantaginaceae > Callitriche 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. stenoptera, C. terrestris
C. brutia, C. fassettii, C. hermaphroditica, C. heterophylla, C. marginata, C. palustris, C. pedunculosa, C. peploides, C. stagnalis, C. stenoptera, C. terrestris, C. trochlearis
Synonyms C. marginata var. longipedunculata
Name authority Fassett: Rhodora 53: 194. (1951) Morong: Bull. Torrey Bot. Club 18: 236. (1891)
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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