|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.
Leaves generally opposite; blade elliptic to triangular, margin entire to lobed
Inflorescence: heads discoid, solitary or in ± flat-topped cymes; phyllaries subequal, in 12(3) series; receptacle flat to conic, naked
Flowers 1060; corollas ± white or blue to pink-tinged, cylindric (or throat wider)
Fruit 5-angled, generally 5-ribbed; pappus of 540 slender scabrous bristles, often easily detached
Etymology: (Latin: resembling Ageratum )
Reference: [King & Robinson 1987 Monogr Syst Bot Missouri Bot Garden 22:428436]
Perennial; caudex woodySee the CNPS Inventory for information about endangerment and rarity.
Stem 1.34.5 dm, erect or ascending, glandular-hairy
Leaves generally alternate; blade ± deltoid-ovate, serrate, ± hairy
Inflorescence: heads generally 1(3), ± 1.2 cm; phyllaries glabrous to glandular-hairy
Flower: corollas white
Fruit 35.5 mm
Ecology: UNCOMMON. Limestone cliffs
Elevation: 4001800 m.
Bioregional distribution: Cascade Range
Synonyms: Eupatorium s. D.W. Taylor & Stebbins
Horticultural information: TRY.