No. 167. 
Hakea s align a, RBr. 
The Willow-leaved Hakea. 
(Family PROTEACEAE.) 
Botanical description. —Genus, linker, Schrader, Sertum Hannov., i, Fasc. iii, 27, 
t. 17 (1797). 
Flo wers. —He;m aph rod i te. 
Perianth. —Irregular, or rarely regular, the tube revolute or curved under the limb, or rarely 
straight, the limb globular or tarely ovoid, often oblique, the laminae often cohering long 
after the tube has opened. 
Anthers. —All perfect, sessile in the base of the concave laminae, the connective not produced 
beyond the cells. 
Hypoyynous ylands. —United in a single semiannular, or semicircular, rarely disk-shaped gland 
occupying the upper side of the torus, in some species very small. 
Ovary. —fStipitate, but usually very shortly so, with two amphitropous ovules laterally attached 
about the middle, style either long, and protruding from the slit of the perian-h before the 
summit is set free from the limb, as in Grevillea, or not exceeding the perianth, more or less 
dilated at the end into a straight, or oblique, or lateral cone or disk, bearing the small 
stigma in the centre of the disk or at the summit of the cone. 
Fruit. —A hard, usually woody capsule opening in two valves. 
Seeds .—Two, compressed and collateral, the testa produced at the upper end into a broad, mem¬ 
branous wing usually longer than the nucleus, and more or less decurrent down the upper or 
both margins, and sometimes completely surrounding the nucleus, the nucleus itself Hat 
and smooth on the inner face (next the other seed), convex on the ou'er face, and usually 
rugose or mui icate, the protuberances fitting into corresponding cavities in the valve ; each 
seed w ith its wing sometimes covering the whole inner surface of the valve, more frequently 
placed near the upper margin, and covering about half only, or rather more, the remainder 
of the valve a hard, woody mass. Shrubs or rarely small trees. 
Leaves. —Alternate, very diversified in shape, flat or terete, the margins rarely recurved, and the 
two surfaces usually similar, and equally veined. 
Flowers .—In pairs along the rhachis of a short and dense raceme or cluster, or rarely in a longer 
raceme ; the clusters or racemes sessile in the axils or rarely also terminal, or in a very 
few species all terminal. 
Indumentum .—As in Grevillea, consisting of closely appressed hairs attached by the centre, 
rarely of erect or spreading hairs. (T5.F1. v, 489.) 
Hakea and Grecillea .—The following interesting account of the genus Hakea, 
with special reference to the closely related genus Grecillea, will also he found in 
the Flora Australiennis (v, 190.) 
The genus is limited to Australia. As will be perceived on comparing the above character with 
that of Grevillea, there is no one organ in which the two genera are absolutely distinct excepting the seed 
