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PRIMULACEAE

PRIMROSE FAMILY

Anita F. Cholewa and Douglass M. Henderson

Annual, perennial herb, subshrub, glabrous to glandular-hairy
Leaves simple, basal or cauline, alternate, opposite, or whorled, sessile or petioled; stipules 0
Inflorescence sometimes scapose
Flower bisexual, radial; parts generally in 4's or 5's; calyx deeply lobed, often persistent; corolla lobes spreading to reflexed; stamens epipetalous, opposite corolla lobes; ovary generally superior, 1-chambered, placenta basal or free-central, style 1, stigma head-like
Fruit: capsule, circumscissile or 2–6-valved
Seeds small, few–many
Genera in family: ± 25 genera, 600 species: especially n hemisphere; several ornamental (Cyclamen , Dodecatheon , Primula )
Reference: [Channell & Wood 1959 J Arnold Arbor 40:268–288]

ANDROSACE

ROCK-JASMINE, FAIRY-CANDELABRA

Annual, perennial herb, generally < 12 cm
Leaves in basal rosette
Inflorescence: umbel 1 per scapose peduncle, terminal, subtended by involucral bracts
Flower: parts in 5's; calyx tube scarious; corolla salverform, tube narrowed at top, lobes acute to obtuse at tip; stamens included, filaments ± 0 or short, anthers oblong; ovary superior, spheric, style short
Fruit 5-valved, spheric
Species in genus: ± 100 species: n temp, arctic, especially Asia
Etymology: (Greek: uncertain sea-plant)
Reference: [Robbins 1944 Amer Midl Nat 32:137–163]

Native

A. filiformis Retz.

SLENDER-STEMMED ANDROSACE

Annual, 3–12 cm, glabrous or ± glandular-hairy; peduncles generally several
Leaf 3–20 mm, ovate to ± triangular, abruptly narrowed to petiole, finely dentate
Inflorescence: involucre bracts 0.8–1.2 mm, < 0.5 mm wide; pedicels 1–4 cm
Flower: calyx < 3, generally 2 mm, glabrous to sparsely glandular-hairy, lobes < to ± = tube; corolla > calyx, white
Ecology: UNCOMMON. Meadows
Elevation: 1800 m.
Bioregional distribution: High Cascade Range (s slope Willow Creek Mtn, n Siskiyou Co.)
Distribution outside California: sporadic to Washington, Rocky Mtns; also in Eurasia

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