Jepson Flora Project: Jepson Interchange    

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

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



Richard Spellenberg

Perennial, shrub, tree, glabrous or hairy
Stem often forked
Leaves opposite, sessile or petioled, pairs generally unequal; blade generally entire
Inflorescence generally forked; of spikes, clusters, or umbels, each unit sometimes with a calyx-like involucre
Flower bisexual, radial; perianth of 1 whorl, petal-like, bell- to trumpet-shaped, base hardened, tightly surrounding ovary in fruit, lobes 4–5, generally notched to ± bilateral; stamens 1–many; ovary superior (appearing inferior because of hardened perianth base), style 1
Fruit: achene or nut, smooth, wrinkled, or ribbed
Genera in family: 30 genera, 300 species: warm regions, especially Am; some ornamental (Bougainvillea ; Mirabilis , four o'clock).



Annual, perennial herb, generally glandular
Stem prostrate to ascending, generally ± red
Leaf generally fleshy, petioled
Inflorescence: head or umbel; flowers opening together or outer first; receptacle conic, ± smooth
Flower: perianth salverform to trumpet-shaped, generally fragrant, lobes 4–5; stamens 4–5, included; stigma linear, included
Fruit: body fusiform; lobe-like wings (0)2–5 (if present, prominent, opaque, thick, not continuous above fruit body)
Species in genus: 25 species: w North America
Etymology: (Greek: graceful)
[Galloway 1975 Brittonia 27:328–347] Closely related to Tripterocalyx.


A. gracilis Benth.

Annual, glandular-hairy
Stem prostrate, < 1 m
Leaf: petiole 10–35 mm; blade 20–45 cm, thin, oblong or elliptic, edges scalloped or wavy
Inflorescence: peduncle 2–10 cm; bracts 6–10 mm, ovate; flowers 13–24
Flower: perianth tube 6–17 mm, ± white or pink, limb 7–16 mm wide, light magenta to purplish red
Fruit 6–11 mm, glandular-hairy; wings 5, thin, broadly rounded, extending above top of fruit body, base of floral tube not forming a prominent hard beak at top of fruit body
Ecology: Sandy soil
Elevation: < 500 m.
Bioregional distribution: South Coast (San Diego Co.), s Sonoran Desert
Distribution outside California: nw Mexico
Intergrades with A. umbellata , A. villosa
Horticultural information: sand, DRN, DRY, SUN: 24.

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