Synonymy

Hakea hookeriana Meisn., in A.L.P.P. de Candolle, Prodr. 14: 412 (1856)

T: Swan R., Western Australia, without date, J.Drummond 5, 413; syn: B, BM, CGE, G, K, MEL, NY, OXF, P, PERTH, TCD. An image of the NY type specimen can be seen on the New York Botanical Garden site.

Hakea hookeriana Meisn., Hooker's J. Bot. Kew Gard. Misc. 4: 208 (1852), nom. nud.

Description

Erect open shrub, 1–5 m tall, non-lignotuberous. Branchlets and young leaves densely appressed-pubescent, ferruginous, quickly glabrescent. Leaves narrowly obovate or obovate, 7–13 cm long, 10–25 mm wide, narrowly attenuate, entire, abruptly short-acuminate, truncate or rounded, blackened at apex.

Inflorescence umbelliform with 5, 7 or 9 flowers; rachis obscure; pedicels 2 mm long, densely appressed-pubescent with white or cream-yellow hairs. Perianth 2–3.5 mm long, densely appressed-pubescent, ferruginous. Pistil 5–5.5 mm long; gland a curved flap.

Fruit obliquely obovate, 5–5.5 cm long, 2.7–3.3 cm wide, finely rugose. Seed obliquely obovate, 30–33 mm long; wing broadly and partly down one side of seed body only.

Distribution and ecology

Found only in the eastern part of Fitzgerald River National Park, but apparently common there (K.Newbey, in litt.). Occurs in rocky quartzite gullies or cliff tops in scrub including Dryandra quercifolia.

To plot an up to date distribution map based on herbarium collections for this species see Australia's Virtual Herbarium. Localities outside the native range may represent cultivated or naturalised records.

Flowering time

Flowers Sept.–Jan.

Derivation of name

Named after William Jackson Hooker (1785-1865), head of Kew Botanic Gardens and editor of numerous botanical journals during the middle 19th Century.

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Relationships

Part of Section Hakea of Bentham (as Euhakea) and characterised by a non-conical pollen presenter, leaves without obvious venation, perianths with or without hairs and fruits with or without horns. Barker et al. (1999) recognised a number of informal morphological groups within the section.

Within this section 6 species were assigned to the informal Ceratophylla group by Barker et al. (1999). The group is close to the Obliqua group, sharing the morphological characteristics of few-flowered inflorescences with pubescent flowers on an obscure rachis, oblique pollen presenters and distinctly woody fruits without horns and usually without beaks and seed in which the wing encircles the seed body or is broadly down one side; the groups differ in the flat leaves of this group compared with the terete leaves of the Obliqua group.

Members of the group are H. baxteri, H. brownii, H. ceratophylla, H. flabellifolia, H. hookeriana and H. pandanicarpa, all from south-west WA.

Conservation status

In Western Australia denoted as Priority Four - Rare: taxa which are considered to have been adequately surveyed and which, whilst being rare (in Australia), are not currently threatened by any identifiable factors. These taxa require monitoring every 5–10 years.

Atkins, K.J. (2008). Declared Rare and Priority Flora List for Western Australia , 26 February 2008. (Dept of Environment and Conservation. Como , W.A.).

Representative specimens

Western Australia: Middle Mt Barren, Whoogarup Ra., C.A.Gardner 2969 (PERTH); cliff-top below East Mt Barren, A.S.George 585 (PERTH); Thumb Peak Ra., SW of Ravensthorpe, A.S.George 7156 (PERTH); Eyre Ra., A.S.George 7240 (PERTH).

Weblinks

Link to FloraBase treatment of this species for WA.

More photographs of this species can be seen on the Australian National Botanic Gardens site.

Further illustrations

J.A..Young, Hakeas of Western Australia. A Field and Identification Guide 50 (2006)

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