Synonymy
Hakea scoparia subsp. trycherica Haegi, Fl. Australia 17B: 395 (1999)
T: S end of Mt Ragged, W.A., A.S.George 14309; holo: PERTH; iso: AD.
Description
Rounded shrub with ascending branches, 1–3.5 m tall, non-sprouting. Branchlets tomentose to appressed-pubescent at flowering, sometimes patchily glabrescent. Leaves ±terete, sometimes compressed, stellate or pentagonal in cross-section, shallowly concave between angles, 12–27 cm long, 1.5–2 mm diam., glabrescent; longitudinal veins 5 all around, at angles.
Inflorescence a solitary axillary umbelliform raceme, with 50–70 flowers; pedicels glabrous. Perianth cream, ageing pink or orange-pink. Pistil 13–15 mm long; gland an obtriangular flap, 0.5–0.7 mm high.
Fruit 1–8 per axil, stalked, obliquely ovate-elliptic, ±straight, 2.2–2.5 cm long, 1.2–1.7 cm wide, acuminate, ±smooth to coarsely pusticulate, scarcely beaked but with prominent readily broken apiculum. Seed obliquely ovate, 13–15 mm long, 5–6 mm wide; wing extending (broadly and fully) down one side of body only, notched, blackish brown.
Distribution and ecology
Restricted to the lower slopes of Mt Ragged, W.A., at the western end of the Great Australian Bight. Occurs among quartzite rocks in closed heath. Flowers Apr.–July.
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 Apr.–July.
Derivation of name
From the Greek, trycheros, ragged, a reference to Mt Ragged, the locality where this subspecies is found.
How the infraspecific taxa differ
The subspecies differ in fruit length, 1.7-2 cm long in subsp. scoparia vs 2.2-2.5 cm long for subsp. trycherica, and in the depth of the grooving of the leaves, with subsp. scoparia being deeply grooved between the 5 angles while subsp. trycherica is usually only shallowly concave.
Relationships
Part of the Conogynoides group recognised by Bentham and characterised by a conical pollen presenter, veined leaves, glabrous perianth and fruits without horns. Barker et al. (1999) recognised a number of informal morphological groups within the section.
One of these was the Ulicina group. This group of 21 Hakea species was combined morphologically because they all have simple flat leaves or leaves which are apparently terete but when looked at in cross section are clearly angled; these angled leaves are longitudinally furrowed and often referred to as sulcate. Furthermore the group has inflorescences with 6-80 small flowers (with 3-18 mm long pistils) and erect woody fruits.
Members of the group are H. aenigma, H. carinata, H. costata, H. cygna, H. dohertyi, H. erecta, H. gilbertii, H. invaginata, H. lehmanniana, H. marginata, H. meisneriana, H. mitchellii, H. myrtoides, H. pycnoneura, H. repullulans, H. rigida, H. scoparia, H. stenocarpa, H. sulcata, H. subsulcata and H. ulicina, mostly from southern WA but also from south-eastern Australia.
The sulcate-leaved members of this group are H. gilbertii, H. invaginata, H. meisneriana, H. rigida, H. scoparia, H. sulcata and H. subsulcata.
Representative specimens
Western Australia: base of Mt Ragged, SW side, P.G.Wilson 5841 (PERTH).
Weblinks
Link to FloraBase treatment of this species for WA.
Further illustrations
I. Holliday, Hakeas. A Field and Garden Guide 190-1 (2005)
J.A..Young, Hakeas of Western Australia. A Field and Identification Guide 104 (2006).