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©Copyright 1993 by the Regents of the University of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

ASTERACEAE

SUNFLOWER FAMILY

David J. Keil, Family Editor and author, except as specified

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.

MADIA

TARWEED

Annual or perennial herb, generally densely glandular, aromatic
Stems 1–several, generally simple below, ± branched above
Leaves generally opposite below, alternate above, generally linear to lanceolate, entire to slightly toothed
Inflorescence: heads generally radiate, generally peduncled, few–many; phyllaries generally 1–20, free, enclosing (and falling with) ray achenes; receptacle ± flat, generally glabrous; chaff scales generally ± fused, in ring between ray and disk flowers
Ray flowers generally 1–20, sometimes minute; ligules 2–3-lobed, generally yellow
Disk flowers 1–many, sometimes staminate; corollas yellow or maroon; anther tips triangular-ovate; style tips linear to oblong, acute, bristly
Fruit club-shaped or obovoid; ray achenes compressed, thickened, or 3-angled (1 angle toward center of head), ridged, sometimes beaked; pappus 0 or of short scales; disk achenes ± symmetric; pappus 0 or of 4–10 scales or bristles
Species in genus: 21 species: w North America, sw South America
Recent taxonomic note: *See revised taxonomy of Baldwin 1999 Novon 9:462–471.
Etymology: (Chilean name)
Reference: [Nelson & Nelson 1980 Brittonia 32:323–325]

Native

M. glomerata Hook.

MOUNTAIN TARWEED

Annual 1.5–8(12) dm, strongly ill-scented
Stems simple below or with stiff ascending branches, very leafy, soft-hairy to ± bristly, especially below, stalked-glandular above; glands yellow
Leaves 2–10 cm, mostly cauline, often with axillary clusters, generally ascending, loosely strigose, often bristly-ciliate; upper glandular
Inflorescence: heads discoid or inconspicuously radiate, ± sessile to short-peduncled, in dense cymes or panicle-like clusters; involucre (including chaff) 5.5–9 mm, narrowly ovoid or ellipsoid, sometimes curved; phyllaries 0–3, soft-hairy or ± bristly, ± glandular, tips flat; chaff scales 1–few, free, ± like phyllaries
Ray flowers 0–3; corolla tubes 1–3.5 mm, ligules 1.5–3 mm, greenish yellow or purple-tinged
Disk flowers 1–5(12), fertile; corollas 3–4.5 mm; anthers black
Fruits alike, 4–6 mm, oblanceolate, compressed side-to-side, glabrous, black; beak 0; pappus 0
Chromosomes: 2n=28
Ecology: Forest openings
Elevation: 1050–2700 m.
Bioregional distribution: s Klamath Ranges (Trinity Alps), Cascade Range, n&c High Sierra Nevada, San Bernardino Mountains, Great Basin Floristic Province
Distribution outside California: to Alaska, South Dakota, Colorado, New Mexico
Flowering time: Jul–Sep
Naturalized in NCo, n SCoR.

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bioregional map for MADIA%20glomerata being generated
 
N.B. The distribution depicted here differs from that given in The Jepson Manual (1993)

Retrieve Jepson Interchange Index to Plant Names entry for Madia glomerata
Retrieve dichotomous key for Madia
Retrieve multiple-entry key (MEKA) for Madia
Overlay Consortium of California Herbaria specimen data by county on this map
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