|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
For up-to-date information about California vascular plants, visit the Jepson eFlora.
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, generally grayish, cobwebby to tomentose
Stems 1several from base, ± spreading to ascending, ± forked, generally ± evenly leafy below, ± leafless between upper forks
Leaves simple, alternate, ± sessile, generally elliptic to oblanceolate, entire
Inflorescence: heads disciform, ± sessile in groups of 210; bracts like leaves; phyllaries 0 or vestigial (or 14 reduced, unequal scales); receptacle (2.8)48 X > wide, ± cylindric to club-shaped; chaff scales subtending pistillate flowers phyllary-like, each generally enclosing a flower (or outermost open), falling with a fruit, generally woolly, ± scarious-winged, wing generally elliptic to obovate, base generally acute; chaff scales subtending disk flowers reduced, open or folded, glabrous to cobwebby, scarious
Pistillate flowers in 3several series; corollas tubular
Disk flowers 26, staminate; ovary vestigial
Fruit obovoid, smooth, shiny; style ± at tip; pappus 0; disk pappus generally of 112 bristles
Species in genus: 7 species: sw North America
Etymology: (Greek: column bed, from long receptacle)
Reference: [Morefield 1992 Madroño 39:114130]
Close to Filago subg. Oglifa, especially F. depressa. See also Ancistrocarphus, Micropus.
Stems < 18 cm, ± leafless between lower forks
Leaves generally acute, < 18 mm; uppermost < 10 mm, ± elliptic to obovate
Inflorescence: heads 3.55 mm, 2.54 mm wide, ± ovoid; phyllaries 0 or vestigial (or 13, 1.52.5 mm, obovate, deciduous), body hard, not scarious; receptacle ± cylindric, length 58 X width; longest chaff scale 2.83.3 mm, winged toward tip, body hard; outermost chaff scales open, nearly glabrous
Disk flowers 1.22 mm
Fruit 1.11.6 mm, compressed front-to-back; disk ovary 0.10.4 mm, pappus bristles 0 or 13, 1.11.5 mm
Ecology: Stable, sandy or rocky soils
Elevation: (150)6001800 m.
Bioregional distribution: East of Sierra Nevada, Mojave Desert, w edge Sonoran Desert
Distribution outside California: to se Oregon, sw Idaho, sw Utah
Flowering time: FebMay
CA plants long mistaken for other Stylocline or Filago species. See S. masonii
Horticultural information: TRY.
|YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).|