The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

terrestrial water-starwort

Matted water-starwort

Stem

and leaf scales present.

and leaf scales present.

Leaves

connate at base, obovate-oblanceolate to spatulate, 1.5–3.9 × 0.8–1.4(–1.5) mm, 2+-veined.

connate at base, spatulate-obovate, 1.4–2.3 × 0.4–1.5 mm, 2+-veined.

Inflorescences

bracts absent.

bracts absent.

Pedicels

0.4–0.6 mm in fruit.

0 mm in fruit.

Flowers

usually solitary or 1 staminate and 1 pistillate opposed by 1 pistillate;

styles deflexed;

pollen yellow.

not solitary, usually 1 staminate and 1 pistillate in 1 axil opposed by 1 pistillate;

styles erect to reflexed;

pollen yellow.

Schizocarps

(0.5–)0.6–0.7(–0.8) × (0.5–)0.8–1 mm, shorter than wide;

mericarps black, not swollen, winged only at apex, wings straight, 0.01–0.03 mm wide.

0.4–0.7 × 0.7–0.9 mm, shorter than wide;

mericarps black, swollen at base, not winged or winged only at apex, wings straight, 0–0.03 mm wide.

2n

= 10.

= 10.

Callitriche terrestris

Callitriche peploides

Phenology Flowering Apr–Jul(–Aug), Nov–Dec. Flowering (Jan–)Feb–Apr(–May), Oct–Dec.
Habitat Seasonally wet hollows, damp soils, cultivated fields, rocky grounds, paths, tracks, sandy bars. Seasonally damp hollows, sandy soils in woodlands, gardens, waste grounds, rocky areas.
Elevation 0–600 m. (0–2000 ft.) 0–100 m. (0–300 ft.)
Distribution
from FNA
AR; CT; DC; IL; IN; KS; KY; LA; MA; MO; MS; NC; ND; NY; OH; PA; TN; TX; VA; NB; Mexico; Central America; South America [Introduced in Asia (China, Japan)]
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; AR; CA; FL; GA; LA; MS; TX [Introduced in Asia (China, Taiwan), Indian Ocean Islands (Madagascar, Réunion), Pacific Islands (New Zealand)]
[WildflowerSearch map]
[BONAP county map]
Discussion

Three varieties of Callitriche peploides have been recognized (N. C. Fassett 1951b). A collection reported as a weed of a container in a nursery in San Bernardino County, California (T. C. Fuller 1967) is referable to var. semialata. The characters used to distinguish these varieties do not appear reliable, and it seems best to disregard them (R. V. Lansdown and M. J. M. Christenhusz 2011).

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

Source FNA vol. 17, p. 54. FNA vol. 17, p. 53.
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. trochlearis
C. brutia, C. fassettii, C. hermaphroditica, C. heterophylla, C. longipedunculata, C. marginata, C. palustris, C. pedunculosa, C. stagnalis, C. stenoptera, C. terrestris, C. trochlearis
Synonyms C. peploides var. semialata
Name authority Rafinesque: Med. Repos., hexade 2, 5: 358. (1808) — (as terrestre) Nuttall: Trans. Amer. Philos. Soc., n. s. 5: 141. (1835)
Web links