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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NYCTAGINACEAE

FOUR O'CLOCK FAMILY

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).

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]

Introduced

M. linearis (Pursh) Heimerl var. linearis


Stem ascending to erect, < 10 dm, glabrous to finely strigose
Leaf ± sessile; blade 3–10 cm, linear to very narrowly lanceolate, somewhat fleshy, gray-hairy
Inflorescence loosely forked; involucre cup-shaped, densely glandular-hairy, enlarged and papery in fruit; bracts 5, 6–10 mm in fruit, 1/2–2/3 fused; flowers generally 3 per involucre
Flower: perianth ± 10 mm, ± funnel-shaped, pale pink to magenta
Fruit ± 5 mm, club-shaped, wrinkled between the 5 ribs, hairy
Ecology: Riverbeds, railroads, roadsides, gravelly places
Elevation: < 300 m.
Bioregional distribution: South Coast (Orange, Riverside cos.)
Distribution outside California: native from Arizona to c US, Mexico
sometimes cultivated as ornamental
Synonyms: Oxybaphus l. (Pursh) B.L. Rob

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bioregional map for MIRABILIS%20linearis%20var.%20linearis 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 Mirabilis linearis var. linearis
Retrieve dichotomous key for Mirabilis
Overlay Consortium of California Herbaria specimen data by county on this map
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