|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.
Species in genus: 1 sp.: w North America
Etymology: (Greek: rock goldenrod)
Perennial < 3 dm, light green, glabrous, taprootedSee the CNPS Inventory for information about endangerment and rarity.
Stems several, erect, striate, gummy
Leaves alternate, 212 cm, linear to (ob)lanceolate, leathery, 3-veined, resin-dotted, entire; margins scabrous
Inflorescence: heads radiate, many, in dense, flat-topped clusters; involucres < 10 mm, < 3 mm diam, cylindric; phyllaries 1021 in 36 series, oblong to ovate, light yellow, tips green; receptacle naked
Ray flowers 23; ligules yellow
Disk flowers 24, staminate; corollas < 6.2 mm, yellow
Fruit 45 mm, 69-veined, compressed, glabrous; pappus bristles thread-like, ± twisted, brownish
Ecology: Rocky soils, pine forest to juniper scrub, often on limestone
Elevation: 23003400 m.
Bioregional distribution: Desert Mountains
Distribution outside California: to Idaho, Wyoming, New Mexico
Flowering time: JulOct
Reference: [Anderson 1963 Trans KS Acad Sci 66:632684]
Horticultural information: TRY.