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Vascular Plants of California
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Diplotaxis tenuifolia

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: DiplotaxisView DescriptionDichotomous Key

Common Name: WALL ROCKET
Habit: Annual to perennial herb, hairs simple; base woody or not. Stem: ascending to erect, leafy or not. Leaf: basal rosetted or not, pinnately lobed or toothed, petioled; cauline 0 or entire to lobed, petioled or sessile. Inflorescence: elongated. Flower: sepals ascending to spreading, base of lateral pair not sac-like; petals +- obovate, yellow [violet or white]. Fruit: silique, dehiscent, segmented, generally narrowed between seeds, linear, cylindric to +- flat parallel to septum, stalked above receptacle or sessile; valves 1-veined, glabrous; terminal segment seedless [seeded]; stigma 2-lobed. Seed: [12]20--46[276], in 2 rows.
Species In Genus: 25--30 species: Europe, northern Africa, western Asia. Etymology: (Greek: 2-rowed, from seed arrangement) Note: Diplotaxis erucoides (L.) DC. occasional weed in botanic gardens.
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Diplotaxis tenuifolia (L.) DC.
Habit: Generally glabrous above. Stem: 2--7(10) dm, generally woody at base. Leaf: basal not rosetted, deeply pinnately lobed, lateral lobes 2--5; cauline short-petioled. Flower: sepals 4--6 mm, glabrous or hairs few; petals 7--11(13) mm, 5--8 mm wide. Fruit: 2--5 cm, 1.5--2.5 mm wide; pedicel 8--35 mm. Seed: 20--32(46), 1--1.3 mm, ovoid. Chromosomes: 2n=22.
Ecology: Uncommon. Disturbed areas, roadsides; Elevation: < 300 m. Bioregional Distribution: ScV, SCo; Distribution Outside California: Canada, United States, native to Europe. Flowering Time: May--Aug
Jepson eFlora Author: Ihsan A. Al-Shehbaz
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Diplotaxis tenuifolia

botanical illustration including Diplotaxis tenuifolia


Citation for this treatment: Ihsan A. Al-Shehbaz 2012, Diplotaxis tenuifolia, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 14, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora,, accessed on December 14, 2019.

No expert verified images found for Diplotaxis tenuifolia.

Geographic subdivisions for Diplotaxis tenuifolia:
ScV, SCo
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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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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.
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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.