Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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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.


Dale E. Johnson

Annual 1–8 dm, sometimes decumbent, ± woolly
Leaves opposite below, alternate above, linear to (ob)lanceolate, entire to wavy-dentate
Inflorescence: head solitary, radiate; involucre hemispheric; phyllaries in 1 series, free or fused into lobed cup, tips black-hairy; receptacle conic, naked
Ray flowers 1 per phyllary; corolla generally yellow, with small lobe opposite ligule
Disk flowers yellow; lobe hairs large, nonglandular
Fruit: ray fruits 3-angled (disk fruits 4-angled), ± obconic; pappus 0
Species in genus: 4 species: CA
Etymology: (Greek: single husk, from phyllaries)
Reference: [Johnson 1991 Novon 1:119–124]


M. gracilens A. Gray

Stems: branches mostly near top, ± spreading
Inflorescence: peduncles 2–12 cm; involucre 5–7 mm; phyllaries 7–11, elliptic-oblanceolate, free
Ray flowers: ligules 5–10 mm, entire or slightly lobed
Fruit ± 2 mm, not compressed, ± glabrous
Chromosomes: 2n=24?,26
Ecology: Serpentine grassland, open chaparral, oak woodland
Elevation: 100–1200 m.
Bioregional distribution: San Francisco Bay Area, South Coast Ranges.

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bioregional map for MONOLOPIA%20gracilens 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 Monolopia gracilens
Retrieve dichotomous key for Monolopia
Retrieve multiple-entry key (MEKA) for Monolopia
Overlay Consortium of California Herbaria specimen data by county on this map
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