Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.

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).

ABRONIA

SAND VERBENA

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.

Native

A. umbellata Lam.

Annual, ± glabrous to glandular-hairy
Stem prostrate, > 1 m
Leaf: petiole 1–6 cm, slender; blade 15–70 mm, 8–50 mm wide, ovate to ± diamond-shaped
Inflorescence: peduncle 2.5–15 cm, slender, generally erect in fruit; bracts 5–7 mm, lanceolate to ovate; flowers 8–27
Flower: perianth tube 6–16 mm, ± green or red, limb 6–16 mm wide, light to bright magenta
Fruit 7–12 mm, glandular-hairy at top, glabrous below, angled or with 2–5 (generally 4) wings broadly rounded above the top of fruit body
Ecology: Disturbed sandy areas, coastal dunes and scrub
Elevation: < 100 m.
Bioregional distribution: North Coast, Central Coast, South Coast
Distribution outside California: to Washington, Baja California
Hybrids with A. maritima : subsp. alba (Eastw.) Munz; subsp. platyphylla (Standley) Munz; subsp. variabilis (Standley) Munz. Hybridizes also with A. latifolia.

Native

subsp. breviflora (Standl.) Munz

PINK SAND-VERBENA


Flower: perianth tube 6–8 mm, ± green or yellow, limb 6–8 mm wide, light to bright magenta, throat surrounded by cream eyespot
Fruit: wings poorly to moderately developed, ± angled
Ecology: Habitat of sp.
Bioregional distribution: North Coast, Central Coast (Marin Co.)
Distribution outside California: s Oregon
Populations generally small.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for ABRONIA%20umbellata%20subsp.%20breviflora 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 Abronia umbellata subsp. breviflora
Retrieve dichotomous key for Abronia
Overlay Consortium of California Herbaria specimen data by county on this map
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