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Electronic Flora of South Australia species Fact Sheet

Family: Proteaceae
Hakea aenigma

Citation: W.R. Barker & Haegi in Haegi & W.R. Barker, J. Adelaide Bot. Gard. 7:261 (1985).

Synonymy: Hakea near Hakea multilineata Meissner: Cleland & J. Black, Trans. R. Soc. S. Aust. 51:35 (1927); Hakea multilineata sensu J. Black, Fl. S. Aust. 267 (1948), partly, auct. non Meissner; Hakea cf. francisiana: Maconochie, Trans. R. Soc. S. Aust. 97:133 (1973); Hakea sp.: W.R. Barker in Jessop, List Vasc. Pl. S. Aust. 75 (1983).

Common name: None

Description:
Compact shrub to 2.5 m high, with ascending smooth branches, suckering from a lignotuber and a horizontal root system; branchlets with a more or less appressed tomentum persisting at least until flowering, sometimes patchily glabrescent; leaves ascending, flat, narrow-linear to linear, 5-35 cm X 3-10 mm, soon glabrous, not consistently twisted at the base, with 1-6 longitudinal veins above, 4-9 veins below, mucro 0.7-1.5 mm long; involucral cone ovoid, 6-10 mm long, apex and margins of bracts white-hirsute.

Racemes with 16-33 cream-white flowers; rhachis 2.5-4 mm long, white-hirsute; pedicel 3-5 mm long; perianth c. 3-3.5 mm long, limb c. 0.8-1.1 mm long; anthers 0.5-0.6 mm long; gland absent; pistil 4.5-7.2 mm long; pollen-presenter a narrow cone 0.5-0.8 mm long, dilated slightly at the base into a narrow flange 0.45-0.7 mm diam.

Fruits never forming.

image of FSA1_Hakea_aen.jpg twig, inflorescence, flower, pistil and upper and lower surface and section of leaf
Image source: fig. 74a in Jessop J.P. & Toelken H.R. (Ed.) 1986. Flora of South Australia (4th edn).

Distribution:  On upper parts of lateritic plateau system, in mallee shrubland in dense or open sites regenerating after fires.

S.Aust.: KI.

Conservation status: native

Flowering time: late Sept. — Nov.


SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia

Biology: A remarkable species, completely dependent for reproduction upon its capacity to sucker; pollen is sterile and ovules and nectar-gland absent. In its closest ally, Hakea repullulans, sterile pollen and seed are not uncommon.

Author: Not yet available


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