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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
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.Key to Abronia
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.
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 10–27. Flower: perianth tube 6–16(20) mm, throat with white to cream spot, limb 5–12(17) mm wide, light to dark magenta. Fruit: 6–13 mm, glandular-hairy at base, glabrous above, wings 4(5), with no sinus at top between. 1 other var., in British Columbia, Washington. [Online Interchange]
Unabridged synonyms: [Abronia umbellata Lam. subsp. alba (Eastw.) Munz; Abronia umbellata Lam. subsp. platyphylla (Standl.) Munz; Abronia umbellata Lam. subsp. variabilis (Standl.) Munz]
Unabridged note: Abronia umbellata var. acutalata (Standl.) C.L. Hitchc. in British Columbia, Washington. Abronia umbellata Lam. subsp. alba (Eastw.) Munz, Abronia umbellata Lam. subsp. platyphylla (Standl.) Munz, and Abronia umbellata Lam. subsp. variabilis (Standl.) Munz do not merit taxonomic recognition because they represent a continuum of variation between and may represent hybrids between Abronia maritima and Abronia umbellata (Tillett 1967 Brittonia 19:299–327), but further study needed.
Previous taxon: Abronia turbinata
Next taxon: Abronia umbellata var. breviflora
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 7 2015
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=11564, accessed on Oct 7 2015
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© 1997 Christopher L. Christie
|Geographic subdivisions indicated for the distribution of Abronia umbellata|| 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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(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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