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Vascular Plants of California
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Abronia umbellata var. umbellata

Higher Taxonomy
Family: NyctaginaceaeView DescriptionDichotomous Key
Habit: 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.
Genera In Family: 30 genera, 350 species: warm regions, especially America; some ornamental (Bougainvillea; Mirabilis, four o'clock).
eFlora Treatment Author: Andy Murdock, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: AbroniaView DescriptionDichotomous Key

Habit: 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.
Species In Genus: 25 species: western North America. Etymology: (Greek: graceful) Note: 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.
Reference: Galloway 2003 FNANM 4:61--69
Species: Abronia umbellataView Description 

Habit: 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]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.
Note: 1 other variety, in British Columbia, Washington.
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.
Abronia umbellata Lam. var. umbellata
Inflorescence: flowers 10--27. Flower: perianth tube 12--16(20) mm, +- green to maroon, throat with white spot, limb 7--12(17) mm wide, light to dark magenta. Fruit: wings poorly to well developed, broadly rounded near tip.
Ecology: Disturbed sandy areas, coastal dunes and scrub; Elevation: < 100 m. Bioregional Distribution: NCo (Sonoma Co.), CCo, SCo, ChI, DSon; Distribution Outside California: Baja California. Flowering Time: All year
Synonyms: Abronia umbellata subsp. umbellata;
Jepson eFlora Author: Andy Murdock
Reference: Galloway 2003 FNANM 4:61--69
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Citation for this treatment: Andy Murdock 2012, Abronia umbellata var. umbellata, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 15, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on December 15, 2018.

Abronia umbellata var. umbellata
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© 2013 Keir Morse
Abronia umbellata var. umbellata
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© 2013 Keir Morse
Abronia umbellata var. umbellata
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© 2012 Gary A. Monroe
Abronia umbellata var. umbellata
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© 2013 Keir Morse
Abronia umbellata var. umbellata
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© 2009 Neal Kramer
Abronia umbellata var. umbellata
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© 2014 Steve Matson

More photos of Abronia umbellata var. umbellata in CalPhotos

Geographic subdivisions for Abronia umbellata var. umbellata:
NCo (Sonoma Co.), CCo, SCo, ChI, DSon;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.