|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Annual, biennial, perennial herb (rarely shrub, tree), often from taproot
Stem often ± scapose, generally ribbed, hollow
Leaves basal and generally some cauline, generally alternate; stipules generally 0; petiole base generally sheathing stem; blade generally much dissected, sometimes compound
Inflorescence: umbel or head, simple or compound, generally peduncled; bracts present (in involucres) or not; bractlets generally present (in involucels)
Flowers many, small, generally bisexual (or some staminate), generally radial (or outer bilateral); calyx 0 or lobes 5, small, atop ovary; petals 5, free, generally ovate or spoon-shaped, generally incurved at tips, generally ± ephemeral; stamens 5; pistil 1, ovary inferior, 2-chambered, generally with a ± conic, persistent projection or platform on top subtending 2 free styles
Fruit: 2 dry, 1-seeded halves that separate from each other but generally remain attached for some time to a central axis; ribs on each half 5, 2 marginal and 3 on back; oil tubes 1several per interval between ribs
Genera in family: 300 genera, 3,000 species: ± worldwide, especially temp; many cultivated for food or spice (e.g., Carum, caraway; Daucus; Petroselinum); some highly toxic (e.g., Conium). Underground structures here called roots, but true nature remains problematic. Mature fruit generally critical in identification; shapes generally given in outline, followed by shape in X -section of 2 fruit halves together.
Perennial, taprooted, cushion-forming, generally coarsely hairy or tomentose
Leaves: lowest bladeless sheaths; upper blades narrowly ovate to round, pinnately or ternately dissected, segments lanceolate or oblong
Inflorescence: umbels compound, head-like, spheric or hemispheric; peduncles spreading; bracts 0; involucel 1-sided, bractlets fused to nearly free; rays fewmany, spreading to spreading-ascending; fertile pedicels very short, sterile > fruit
Flower bisexual, staminate, or sterile; calyx lobes conspicuous or not; petals spoon-shaped or oblanceolate, generally white or yellow, or becoming purple, early deciduous, tips narrowed; projection atop ovary 0
Fruit ovate to round, slightly compressed side-to-side or cylindric, hairy; ribs subequal, thread-like; oil tubes per rib-interval several; fruit axis divided to base
Seed: face deeply grooved
Species in genus: 3 species: high mtns of CA-FP
Etymology: (Greek: mountain dwarf)
Reference: [Shevock & Norris 1981 Fremontia 9:2225]
Plant 0.82.2 cm, grayish hairySee the CNPS Inventory for information about endangerment and rarity.
Leaf: bladeless sheaths 36 cm; petiole 47 cm; blade 510 cm, narrowly ovate, segments 13 mm, lanceolate or oblong
Inflorescence: umbels 2.54.5 cm diam, spheric, appearing well before leaf blades; peduncles 1218 cm, spreading; bractlets fused; rays 2035, 515 mm, outer scarious-winged, webbed; sterile pedicels 310 mm
Flower bisexual, staminate, or sterile; calyx lobes 1.53 mm, stellate-spreading, purple; corolla white; anthers purple
Fruit 45 mm wide, nearly glabrous to hairy
Ecology: Ridge-tops, on generally metamorphic rocks, red fir or lodgepole pine
Elevation: 25002600 m.
Bioregional distribution: s High Sierra Nevada.