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Hornungia procumbens

Higher Taxonomy
Family: Brassicaceae (Cruciferae)View DescriptionDichotomous Key
Habit: Annual to shrub; sap pungent, watery. Leaf: generally simple, alternate; generally both basal, cauline; stipules 0. Inflorescence: generally raceme, generally not bracted. Flower: bisexual, generally radial; sepals 4, generally free; petals (0)4, forming a cross, generally white or yellow to purple; stamens generally 6 (2 or 4), 4 long, 2 short (3 pairs of unequal length); ovary 1, superior, generally 2-chambered with septum connecting 2 parietal placentas; style 1, stigma entire or 2-lobed. Fruit: capsule, generally 2-valved, "silique" (length >= 3 × width) or "silicle" (length < 3 × width), dehiscent by 2 valves or indehiscent, cylindric or flat parallel or perpendicular to septum, segmented or not. Seed: 1--many, in 1 or 2 rows per chamber, winged or wingless; embryo strongly curved.
Genera In Family: +- 330 genera, 3780 species: worldwide, especially temperate. Note: Highest diversity in Mediterranean area, mountains of southwestern Asia, adjacent central Asia, western North America; some Brassica species are oil or vegetable crops; Arabidopsis thaliana used in experimental molecular biology; many species are ornamentals, weeds. Aurinia saxatilis (L.) Desvaux in cultivation only. Aubrieta occasional waif in central NCoR, Carrichtera annua (L.) DC. in SCo, Iberis sempervirens L., Iberis umbellata L. in PR, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern NCoRO, CCo. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella.
eFlora Treatment Author: Ihsan A. Al-Shehbaz, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: HornungiaView Description 

Habit: Annual [perennial herb]; hairs 0 or mixture of simple and branched. Leaf: basal rosetted or not, pinnately lobed, dentate, or entire, petioled or sessile, bases not lobed. Inflorescence: open. Flower: sepals spreading or reflexed, not sac-like at base; petals not clawed. Fruit: silicle, ovate to elliptic, flat perpendicular to septum, dehiscent, unsegmented; stigma entire. Seed: [4]10--24, generally in 2 rows; wings 0.
Etymology: (E.G. Hornung, German pharmacist in Schwarzburg, 1795--1862) Note: Hutchinsia used by Rollins (1993) and in TJM (1993), but name illegitimate.
Unabridged Note: Hymenolobus, Pritzelago also generic synonyms.
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Reference: Appel & Al-Shehbaz 1998 Novon 7:338--340
Hornungia procumbens (L.) Hayek
Habit: Annual. Stem: decumbent to erect, branched at base (simple), (2)5--22(30) cm. Leaf: basal, proximal cauline petioled, (0.4)0.7--1.5(2.5) cm, obovate to oblanceolate, entire to toothed or lobed; distal cauline sessile. Flower: sepals 0.6--1.1 mm; petals 0.6--1.2 mm, spoon-shaped, white. Fruit: (2)3--4(4.5) mm, elliptic to obovate or oblong; valve with prominent midvein; style to 0.1 mm; pedicel spreading, 3--8(12) mm. Seed: 10--24, 0.5--0.6 mm, oblong. Chromosomes: 2n=12, 24.
Ecology: Saline flats, shaded sites, woodland, desert, meadows, salt marshes, sagebrush scrub; Elevation: < 2900 m. Bioregional Distribution: CA (exc KR, n&c SNH); Distribution Outside California: to British Columbia, eastern Canada, Colorado; native to Eurasia. Flowering Time: Feb--Jul
Synonyms: Hutchinsia procumbens (L.) Desv., illeg.; Hymenolobus procumbens (L.) Nutt. ex Torr. & A. Gray
Jepson eFlora Author: Ihsan A. Al-Shehbaz
Reference: Appel & Al-Shehbaz 1998 Novon 7:338--340
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Botanical illustration including Hornungia procumbens

botanical illustration including Hornungia procumbens

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Citation for this treatment: Ihsan A. Al-Shehbaz 2012, Hornungia procumbens, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on June 22, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on June 22, 2024.

Hornungia procumbens
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©2006 Steve Matson
Hornungia procumbens
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©2010 Steve Matson
Hornungia procumbens
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©2010 Gary A. Monroe
Hornungia procumbens
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©2006 Steve Matson
Hornungia procumbens
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©2013 Gary A. Monroe

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Geographic subdivisions for Hornungia procumbens:
CA (exc KR, n&c SNH)
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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).


Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

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 (fruiting time in some monocot genera).