TREATMENT FROM THE JEPSON MANUAL (1993) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
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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.
Annual, perennial herb, subshrubs; odor strong
Stems erect
Leaves simple, alternate or opposite; blade dotted with embedded oil glands
Inflorescence: heads discoid, peduncled, solitary or in ± leafy cymes; involucre ± cylindric; phyllaries in 1 series, equal, free or fused at base, gland-dotted; receptacle naked
Flowers: corollas white to greenish yellow or purple; style branches long, slender
Fruit cylindric; pappus of many bristles
Species in genus: ± 30 species: North America., South America
Etymology: (Greek: pore-leaf, from gland-dotted leaves)
Reference: [Johnson 1969 Univ Kansas Sci Bull 48:225267]
Native |
Subshrub; herbage ill-scented
Stems 1many, 37 dm, glaucous, glabrous; branches slender, ascending
Leaves 15 cm, narrowly linear, entire, glaucous
Inflorescence: heads 1few; involucre 48 mm diam; phyllaries 5, free, 1016 mm, oblong, glaucous, dotted or streaked with glands
Flowers 2030; corolla 79 mm, purplish or whitish
Fruit 810 mm; pappus 67 mm, dull white to brownish
Chromosomes: 2n=48
Ecology: Rocky slopes
Elevation: < 1500 m.
Bioregional distribution: Desert
Distribution outside California: to Nevada, Texas, n Mexico
Flowering time: OctJun
Horticultural information: STBL.