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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.

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.

MALACOTHRIX

W.S. Davis

Annual or perennial herb < 60 dm, generally ± branched, generally erect; sap milky
Leaves generally basal and cauline, alternate, sessile, generally reduced upward
Inflorescence: heads ligulate, 2–10 mm diam; involucre 5–20 mm, generally bell-shaped; phyllaries in 3–6 series; receptacle naked or with fragile bristles < 5 mm
Flowers: corollas readily withering; ligules yellow or white, generally ± purple-striped below
Fruit generally fusiform, straw-colored to purple-brown, truncate; veins 15 (5 generally prominent, 10 sometimes obscure); outer pappus ± 0 or of 0–6 smooth, persistent bristles, inner 12–32 bristles fused at base, readily deciduous, minutely barbed below
Species in genus: 21 species: w North America, s South America
Etymology: (Greek: soft hair)
Reference: [Williams 1957 Am Midland Naturalist 58:494–517]

Native

M. saxatilis (Nutt.) Torr. & A. Gray

Perennial 30–60 cm, from rhizome or caudex, glabrous to tomentose
Leaves linear to obovate, entire to irregularly lobed; basal withering early
Inflorescence: heads 6–8 mm diam, base generally tapered; involucre 10–12 mm; outer phyllaries generally 1/2 inner, generally lanceolate
Flowers: corollas 13–20 mm, white, outer corollas exserted 8–14 mm
Fruit 1.3–2.5 mm, minutely spiny, straw-colored to purple-brown; outer pappus of irregular teeth, bristles 0
Chromosomes: 2n=18
Ecology: Open coastal sage, chaparral, sand dunes
Elevation: < 2000 m.
Bioregional distribution: South Coast Ranges, South Coast, Channel Islands, Transverse Ranges.Varieties intergrade.

Information on Plant Height was contributed by Sean Watts (17 Jan 2004):
Jepson entry has 'Perennial 3-60 dm'...That is a big dandelion!

Native

var. arachnoidea (McGregor) E.W. Williams

CARMEL VALLEY MALACOTHRIX

Plant rhizomed, leafy, tomentose
Leaves: cauline lanceolate to elliptic, generally entire, tip acute
Inflorescence dense
Ecology: Rocky, open banks
Elevation: < 900 m.
Bioregional distribution: Outer South Coast Ranges.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for MALACOTHRIX%20saxatilis%20var.%20arachnoidea being generated
 
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).

Retrieve Jepson Interchange Index to Plant Names entry for Malacothrix saxatilis var. arachnoidea
Retrieve dichotomous key for Malacothrix
Retrieve multiple-entry key (MEKA) for Malacothrix
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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