Common name: Mustard & Cress
Lepidium howei-insulae Thell. APNI*
Description: Perennial subshrub to c. 1 m tall. Stems sometimes partially creeping.
Leaf lamina linear, remotely pinnatisect, 2–6 (-10) cm long, 2–4 mm broad, acute to subapiculate, fleshy, glabrous; lobes opposite, remote, linear, 2–4 per side, 1–15 mm long.
Sepals ovate, c. 1 mm long, green with white margins. Petals 1.5 mm long, white. Stamens usually 6.
Infructescence elongate, racemose; pedicels spreading, c. 5 mm long. Silicula ellipsoidal, 4–5 mm long, acute; valves keeled. Seeds ellipsoidal, slightly oblique, 1.5 mm long.
Distribution and occurrence: Lord Howe Is. Endemic, with a scattered distribution. Also recorded from Balls Pyramid.
Found on rocky ledges and in sandy pockets near the sea.
NSW subdivisions: LHI
Text by B.M. Wiecek
Taxon concept: Flora of Australia Volume 49
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.