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Jepson Interchange (more information)
©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.

GRINDELIA

GUMPLANT

Meredith A. Lane

Biennial to subshrub from taproot or woody caudex, glabrous to tomentose or glandular-sticky
Leaves entire to pinnately lobed, generally clasping, gland-dotted
Inflorescence: heads generally radiate, 1–many; involucres obconic to hemispheric, generally gummy; phyllaries in 4–10 series, bases generally tough, tips green; receptacle flat to convex, naked, ± pitted
Ray flowers 0–many; ligules yellow
Disk flowers: corollas yellow; style appendages linear to lanceolate, generally = or > stigmatic portion
Fruit cylindric or swollen-obconic, shiny white to ± brown, glabrous, smooth to ridged; pappus of 1–6 awns ± < disk corollas, generally < 0.2 mm wide, generally U-shaped in X -section, generally entire, deciduous
Species in genus: ± 80 species: c&w North America, South America
Etymology: (D.H. Grindel, 1776–1836, Latvian botanist)
Hybrids common.

Native

G. stricta DC.

Perennial or subshrub 2–15 dm, prostrate to erect, green to deep purplish red, glabrous to tomentose
Leaf 1–15 cm, oblong to lanceolate, ± fleshy, green or red-veined
Inflorescence: heads 1–many, generally not subtended by bracts; involucres 10–55 mm diam, hemispheric; phyllaries 4–6 series, spreading to slightly recurved
Ray flowers generally 20–60; ligules 12–25 mm
Disk flowers many; corolla throat abruptly wider than tube
Fruit 3.5–7 mm, whitish or gray- to red-brown, ridged, top knobby; pappus awns 2–6, becoming reflexed to coiled, > 0.3 mm wide, V-shaped in X -section, minutely serrate
Ecology: Tidal flats, marshes, dunes, seabluffs
Elevation: < 200 m.
Bioregional distribution: North Coast, Central Coast, South Coast, Channel Islands
Distribution outside California: to Alaska
Varieties intergrade.

Native

var. angustifolia (A. Gray) M.A. Lane

MARSH GUMPLANT

Subshrub 10–15 dm, erect, glabrous
Leaves: cauline narrower near middle, tips generally acute
Inflorescence: heads generally not subtended by bracts
Ray flowers 16–56; ligules 12–17 mm
Fruit 5–7 mm
Chromosomes: 2n=12,24
Ecology: UNCOMMON. Tidal areas
Elevation: < 10 m.
Bioregional distribution: n Central Coast
Synonyms: G. humilis Hook. & Arn. misapplied
Hybrid: G. X paludosa Greene (X G. camporum).

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bioregional map for GRINDELIA%20stricta%20var.%20angustifolia being generated
 


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