| 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. |
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, 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.
Annual to shrub
Leaves generally opposite below, ± alternate above
Inflorescence: heads many, disciform; involucre cup-shaped, shallow; phyllaries few, free or fused; receptacle chaffy
Pistillate flowers 0–6; corolla 0 or cylindric
Staminate flowers 5–20; corolla translucent; anthers free, yellow; style tip truncate or tack-shaped
Fruit obovate, ± compressed; pappus 0
Etymology: (Latin: from mint Ajuga iva , with similar aroma)
Reference: [Jackson 1960 Univ KS Sci Bull 41:793–876]
| Native |
Annual < 3 dm, from stout taproot, ill-scented
Stems yellow
Leaves 8–18 mm, 2-pinnately dissected (segments ± obtuse), ± glandular and white-strigose
Inflorescence: small cymes, leafy-bracted; heads erect; involucre 2–3 mm; phyllaries generally 3, free outer chaff scales wide, inner linear
Pistillate flowers: corolla short
Fruit glabrous; inner face flat or concave
Ecology: Alkaline, sandy plains
Elevation: 1000–2000 m.
Bioregional distribution: nw White and Inyo Mountains
Distribution outside California: w Nevada
Flowering time: Jun–Oct
Reference: [Bolick 1983 Advances in Cladistics 2:125–141]