Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



David J. Keil, Family Editor and author, except as specified

Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many 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)4–5; stamens 4–5, 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):1–28. See glossary p. 25 for illustrations of general family characteristics.


Bruce G. Baldwin

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 0–8 cm; phyllaries 0–3, folded around ray ovaries; chaff scales in 1 involucre-like series, ± equal, ± fused
Ray flowers 0–3; corollas yellow; ligules deeply lobed; style branches long, ± glabrous
Disk flowers 5–29; 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 37:43–54]
Close to Madia and Hawaiian silversword alliance (including Railliardia ).


R. scabrida (Eastw.) Rydb.


Plant from branched caudex, not matted
Leaves < or = 30 mm, blue-greenish, sometimes clasping; tip often obtuse
Inflorescence: chaff scales 5–12, 6–12 mm, glandular and ciliate-hairy
Ray flowers 0–3; corollas 3.5–11.5 mm
Disk flowers 5–23; corollas 4.5–9.5 mm
Fruit: ray achenes 6–8 mm; pappus bristles 0(–7); disk achenes 5–9 mm, 1.3–2.4 mm wide, ± club-shaped to linear; pappus bristles 11–21, < or = mature achene
Chromosomes: 2n=14
Ecology: UNCOMMON. Dry, open ridges on metamorphic soil
Elevation: 1650–2300 m.
Bioregional distribution: High North Coast Ranges, High Cascade Range (Shasta Co.).
Synonyms: Raillardella s. Eastw
Recent taxonomic note: *Anisocarpus scabridus (Eastw.) B.G. Baldwin

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