TREATMENT FROM THE JEPSON MANUAL (1993) |
previous taxon |
next taxon
Jepson Interchange (more information) |
|
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
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 caudex or woody rhizome, hairy to glandular-hairy
Stems ascending or erect, generally < or = 6 dm, often branched
Leaves opposite below, alternate above, simple, linear to lanceolate, entire, sessile
Inflorescence glandular; heads radiate or discoid, solitary or in leafy cymes, cylindric to bell-shaped; peduncles 08 cm; phyllaries 03, folded around ray ovaries; chaff scales in 1 involucre-like series, ± equal, ± fused
Ray flowers 03; corollas yellow; ligules deeply lobed; style branches long, ± glabrous
Disk flowers 529; corollas yellow; style branches long, bristly to base
Fruit ± cylindric, black; ray achenes curved, glabrous to partly hairy; disk achenes ± straight, ascending-hairy; pappus of flat, ciliate-plumose bristles
Species in genus: 2 species: montane CA-FP
Etymology: (Greek: like Raillardia or Railliardia )
Reference: [Baldwin & Kyhos 1990 Madroño 37:4354]
Close to Madia and Hawaiian silversword alliance (including Railliardia ).
Native |
Plant often matted; rhizome loosely branched
Leaves < or = 42 mm, greenish, not clasping; tip acute
Inflorescence: chaff scales 516, 813 mm, glandular-hairy on outer surface
Ray flowers 0
Disk flowers 729; corollas 6.510 mm
Fruit 3.57.5 mm, 0.51.2 mm wide, linear; pappus bristles 917, = or > mature achene
Chromosomes: 2n=16
Ecology: Dry, open sites on granitic soil
Elevation: 11002500 m.
Bioregional distribution: s High Sierra Nevada, Outer South Coast Ranges (Ventana Double Cone, Monterey Co.).
Synonyms: Raillardella m. A. Gray
Recent taxonomic note: *Carlquistia muirii (A. Gray) B.G. Baldwin