Hakea petiolaris Meisn. Sea Urchin Hakea
Lehm., Pl.Preiss. 1:577-578 (1845)

Conservation Code: Not threatened
Naturalised Status: Native to Western Australia
Name Status: Current

Brief Description
Amanda Spooner, Monday 23 June 2003

Erect shrub or tree, to 9 m high. Fl. pink & cream, Mar to Jul. Loam, granite. Outcrops.

Distribution

Beard’s Provinces: South-West Province.

IBRA Regions: Avon Wheatbelt, Jarrah Forest, Mallee, Swan Coastal Plain.

IBRA Subregions: Avon Wheatbelt P1, Avon Wheatbelt P2, Northern Jarrah Forest, Perth, Western Mallee.

Local Government Areas (LGAs): Busselton, Dowerin, Goomalling, Kalamunda, Lake Grace, Wongan-Ballidu.

Scientific Description
Chris Hollister and Nicholas S. Lander, Tuesday 8 April 2008

Habit and leaf form. Trees or shrubs, 1–9 m high. Leaves alternate, leaves 40–150 mm long overall. Leaf blade 40–150 mm long, 12–60 mm wide, undissected, elliptic or spathulate, flat; margins entire; indumentum absent or present (subsp. trichophylla, only at flowering time).

Inflorescence and floral features. Inflorescence axillary (or at leafless nodes), racemose. Flowers pedicellate, cream and pink. Pedicel 7–9.5 mm long. Perianth (perigone) 7–8 mm long. Pistil 14–18 mm long. Pollen presenter simple.

Fruit and seed features. Fruit 22–36 mm long, 11–19 mm wide; corky tetrahedral projections absent; red-brown and pale wood zones absent. Seed 14–22 mm long; wing discontinuous, marginal, extending ± unequally down each lateral side.

Distribution. Western Australia. IBRA Bioregions SW: AW, JF, and MAL.

Habitat. In gravelly soil, or loam.

Flowering Time. March to July.

Etymology. Petiolaris (L.): petiolus - little foot; referring to the leaf-stalks of this species.

Descriptions were generated using DELTA format and DELTA software: Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993 onwards, 1995 onwards, 1998)