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NYCTAGINACEAE FOUR O'CLOCK FAMILY

Andy Murdock, except as noted

Annual, perennial herb, subshrub, [shrub, tree], glabrous or hairy. Stem: often forked. Leaf: opposite, sessile or petioled, pairs generally unequal; blade generally entire. Inflorescence: generally forked; spike, head-like cluster, or umbel, flowers rarely 1, bracts forming a calyx-like involucre or not. Flower: bisexual, generally ± radial (bilateral), sometimes cleistogamous in some genera; perianth of 1 whorl, generally petal-like, bell- to trumpet-shaped, base hardened, tightly surrounding ovary in fruit, lobes 3–5, generally notched to ± lobed; stamens 1–many; ovary superior (appearing inferior due to hardened perianth base), style 1. Fruit: achene in hardened perianth base; round to ± flat; smooth, angled, ribbed, or winged; glabrous, hairy, or glandular.
30 genera, 350 species: warm regions, especially America; some ornamental (Bougainvillea; Mirabilis, four o'clock). [Spellenberg 2003 FNANM 4:14–17] —Scientific Editor: Thomas J. Rosatti.

Key to Nyctaginaceae

ABRONIA SAND-VERBENA
Annual, perennial herb, generally glandular. Stem: prostrate to ascending, generally ± red. Leaf: generally fleshy, petioled. Inflorescence: head or umbel; flowers maturing outer before inner or ± simultaneously; receptacle conic, ± smooth; bracts 5–10. Flower: perianth salverform to trumpet-shaped, generally fragrant, lobes 4–5; stamens 4–5, included; stigma linear, included. Fruit: body fusiform; wings (0)2–5, lobe-like, prominent, opaque, thick, not continuous above fruit body.
25 species: western North America. (Greek: graceful) [Galloway 2003 FNANM 4:61–69] Closely related to Tripterocalyx; relationships among species Abronia gracilis Benth. (Mexico), Abronia maritima, Abronia umbellata, and Abronia villosa need study; hybrids involve Abronia latifolia, Abronia maritima, Abronia umbellata; Abronia gracilis included in TJM (1993) based on misidentifications.

Key to Abronia

A. pogonantha Heimerl
NATIVE
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 basally ± green, limb 6–8 mm wide, white to pink. Fruit: 4–6 mm, broadly obcordate, with sinus at top between wings; wings 2(3), interior spongy.
Sand, desert communities; < 2000 m. s San Joaquin Valley, San Gabriel Mountains, Mojave Desert, Mojave Desert/Sierra Nevada; western Nevada. Apr–Jul [Online Interchange]

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Next taxon: Abronia turbinata

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 22 2014
Citation for this treatment: [Author of taxon treatment] 2013. Abronia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11560, accessed on Sep 22 2014

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click for enlargement Abronia pogonantha
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2005 Christopher L. Christie

Geographic subdivisions indicated for the distribution of Abronia pogonantha Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.