|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 to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1many per head
Flowers bisexual, unisexual, or sterile, ± small, of several types; calyx 0 or modified into pappus of bristles, scales, or awns, which is generally persistent in fruit; corolla radial or bilateral (rarely 0), lobes generally (0)45; stamens 45, anthers generally fused into cylinder around style, often appendaged at tips, bases, or both, filaments generally free, generally attached to corolla near throat; pistil 1, ovary inferior, 1-chambered, 1-seeded, style 1, branches 2, generally hair-tufted at tip, stigmas 2, generally on inside of style branches
Fruit: achene, cylindric to ovoid, generally deciduous with pappus attached
Genera in family: ± 1300 genera, 21,000 species (largest family of dicots): worldwide. Largest family in CA. Also see tribal key to CA genera: Strother 1997 Madroño 44(1):128. See glossary p. 25 for illustrations of general family characteristics.
Perennial from woody taproot
Stems 1many, decumbent to erect, generally red-tinged
Leaves alternate, simple, glabrous to tomentose or glandular; basal petioled; cauline generally clasping, reduced
Inflorescence: heads generally radiate, 1many; involucre hemispheric to bell-shaped; phyllaries in 26 ± graduated series, herbaceous
Ray flowers 1080; corollas 235 mm, yellow
Disk flowers 20100+; corollas 515 mm, cylindric to funnel-shaped, yellow
Fruit 34-angled, generally hairy; pappus bristles 1560, generally rigid, unequal
Species in genus: ± 10 species: w North America
Etymology: (Greek: reddish pappus)
Reference: [Mayes 1976 PhD Univ TX]
Formerly included in Haplopappus.
Plant generally ± (sub)glabrous (densely glandular upward)
Stems 1550 cm
Leaves ± (ob)lanceolate, sometimes glandular; basal petioled, 630 cm, dentate; cauline sessile, reduced
Inflorescence: heads 425, in flat-topped clusters; involucre 922 mm wide, hemispheric; phyllaries overlapping in 34 series, 611 mm, unequal, ± lanceolate
Ray flowers 1840; ligules 612 mm
Disk flowers many; corollas 57 mm
Fruit ± 4 mm, 4-angled, silky; pappus ± 57 mm, tan
Ecology: Alkaline meadows, marsh edges, open places
Elevation: 13002800 m.
Bioregional distribution: Modoc Plateau, n East of Sierra Nevada
Distribution outside California: to Oregon, Idaho, south-central Canada, c US
Synonyms: Haplopappus l. (Hook.) Torr. & A. Gray
Variable; needs study.
Plant copiously stalked-glandular, especially toward inflorescence
Ecology: Dry slopes and alkaline meadows
Elevation: 15002000 m.
Bioregional distribution: Modoc Plateau
Distribution outside California: nw Nevada