Flora of North America species comparison

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Diplotaxis tenuifolia

flixweed, perennial wall-rocket, slime-leaf wallrocket, slimleaf wall-rocket
Habit Perennials, (usually suffrutescent, roots with shoots from adventitious buds), strongly scented (with glucosinolates), (glaucescent).
Stems

erect, 2–7(–10) dm, glabrescent or sparsely pubescent basally.
Basal leaves

blade elliptic to obovate, 2–15 cm × 10–60(–80) mm, margins sinuate to deeply pinnatifid, (2–5 lobes each side).
Cauline leaves

petiolate;

similar to basal, (distal cauline shortly petiolate, blade similar, with narrower segments), surfaces usually glabrescent.
Flowers

sepals 4–6 mm, glabrous or pubescent, trichomes straight;

petals yellow, 7–11(–13) × 5–8 mm, (apex rounded);

filaments 4–8 mm;

anthers 2.5–3 mm;

gynophore 0.5–3 mm.
Fruiting pedicels

8–35 mm.
Fruits

usually erect, rarely ascending, (somewhat torulose, slightly compressed), 2–5 cm × 1.5–2.5 mm;

terminal segment (stout), beaklike, 1.5–3 mm, seedless; (ovules 20–32(–46) per ovary).
Seeds

1–1.3 × 0.6–0.9 mm.
2n

= 22.

Diplotaxis tenuifolia
Phenology Flowering spring–fall.
Habitat Waste places, disturbed areas, wharf and railroad ballast, sandy beaches, muddy shores, wet woods, mountain slopes
Elevation 0-2100 m (0-6900 ft)
Distribution
from FNA
AZ; CA; CT; FL; GA; IN; MA; ME; MI; MO; NJ; NM; NY; OH; OR; PA; TX; NS; ON; QC; Eurasia; Africa [Introduced in North America; introduced also in South America (Argentina), Australia]
[WildflowerSearch map]
[BONAP county map]
Discussion

Diplotaxis tenuifolia was introduced from Europe as a ballast plant in the last century. It may have failed to persist in some of the recorded provinces and states.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 433.
Parent taxa Brassicaceae > tribe Brassiceae > Diplotaxis
Sibling taxa
D. erucoides, D. muralis
Synonyms Sisymbrium tenuifolium
Name authority (Linnaeus) de Candolle: Syst. Nat. 2: 632. (1821)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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