Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from 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. pogonantha Heimerl

Annual, glandular-hairy
Stem decumbent to ascending, 10–55 cm
Leaf: petiole 0.8–4 cm; blade 1.5–5.5 cm, 1–3 cm wide, ovate to oblong-ovate
Inflorescence: peduncle 2–7 cm; bracts 4–9 mm, lanceolate to broadly ovate; flowers 12–24
Flower: perianth tube 1–2 cm, ± red or green, limb 6–8 mm wide, white or pink
Fruit 4–6 mm, 2–3-winged, outline cordate; wing interior spongy
Ecology: Sand, desert communities
Elevation: < 1550 m.
Bioregional distribution: s San Joaquin Valley, Mojave Desert (and adjacent margins of Sierra Nevada)
Distribution outside California: w Nevada
Flowering time: Apr–Jul
Horticultural information: TRY.

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