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).



Perennial, subshrub
Stem repeatedly forked, decumbent to erect
Leaf generally petioled
Inflorescence forked; calyx-like involucres densely clustered or solitary in axils, bell- to saucer-shaped; flowers 1–16 per involucre, blooming sequentially
Flower: perianth funnel- to bell-shaped, lobes 5; stamens 3–5, generally exserted; stigma ± spheric, generally exserted
Fruit ± round to club-shaped, smooth to 5-ribbed; wing 0
Species in genus: ± 60 species: Am, Himalayas
Etymology: (Latin: wonderful)
Fls open in evening, close in morning. Spp. intergrade; Hermidium , Oxybaphus sometimes segregated, but intergrade with other species; careful study needed. [Pilz 1978 Madroño 25:113–132]


M. nyctaginea (Michx.) MacMill.

Stem erect, < 10 dm, glabrous to ± hairy
Leaf: blade < 10 cm, ovate or cordate, ± glabrous
Inflorescence: of umbels grouped in forked clusters; peduncles hairy; involucre cup-shaped, base short-hairy, lobes glabrous, enlarged and papery in fruit; bracts 5, 10–15 mm in fruit, ± 2/3 fused; flowers 3–5 per involucre
Flower: perianth ± 10 mm, broadly funnel-shaped, white or pale pink
Fruit 4–6 mm, broadly club-shaped, wrinkled or warty between 5 wide ribs, hairy
Ecology: Disturbed places
Elevation: < 400 m.
Bioregional distribution: e South Coast (especially San Bernardino Co.)
Distribution outside California: native to c US, n Mexico
Synonyms: Oxybaphus n. (Michx.) Sweet

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