Stellaria umbellata

Turczaninow

Bull. Soc. Imp. Naturalistes Moscou 15: 173. 1842.

Common names: Umbellate starwort
Illustrated
Synonyms: Alsine baicalensis Coville Stellaria gonomischa B. Boivin Stellaria weberi B. Boivin
Treatment appears in FNA Volume 5. Treatment on page 113. Mentioned on page 96, 98.

Plants perennial, forming small clumps or mats, rarely long-straggling, from slender rhizomes. Stems erect, branched at base, 4-angled, 5–20 cm (rarely to 40 cm when long and straggling), glabrous. Leaves spatulate-petiolate (proximal) or sessile (distal), bases clasping, connate around stem, ciliate; blade elliptic to lanceolate, 3–9 cm × 1–3 mm, somewhat succulent, base round to cuneate, margins entire, apex acute, glabrous. Inflorescences terminal, (1–)2–ca. 21-flowered, subumbellate, often with 1 or 2 axillary flowers below; bracts lanceolate, 1–7 mm, distal ones entire, scarious, proximal ones usually herbaceous. Pedicels sharply deflexed at base, often curved distally in fruit, 7–20 mm, glabrous. Flowers ca. 2 mm diam.; sepals 5, 3-veined, lanceolate, 2.5–3 mm, margins narrow, scarious, apex obtuse, glabrous; petals absent; stamens 5; styles 3, ascending, curled, ca. 0.25 mm. Capsules straw colored, conic, 3–4.5 mm, exceeding sepals, apex obtuse, opening by 6 valves; carpophore absent. Seeds brownish, round, 0.5–0.7 mm diam., shallowly rugose. 2n = 26.


Phenology: Flowering summer.
Habitat: Moist meadows, rocky summits, gravelly stream- and roadsides
Elevation: 1000-2800 m

Distribution

V5 237-distribution-map.gif

Alta., B.C., N.W.T., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo., Asia.

Discussion

Lower Taxa

None.
... more about "Stellaria umbellata"
John K. Morton +
Turczaninow +
Umbellate starwort +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wash. +, Wyo. +  and Asia. +
1000-2800 m +
Moist meadows, rocky summits, gravelly stream- and roadsides +
Flowering summer. +
Bull. Soc. Imp. Naturalistes Moscou +
boivin1956a +
Illustrated +
Alsine baicalensis +, Stellaria gonomischa +  and Stellaria weberi +
Stellaria umbellata +
Stellaria +
species +