CXI. PROTEACEiE. 
1319 
1. PETROPHILA, R. Br. 
(From being found in rocky places.) 
Elowers hermaphrodite. Perianth regular, the tube slender, separating into 4 
•segments from the base or (in two sections) remaining united, the limb of 4 linear 
laminae. Anthers all perfect and free, sessile at the base of the laminae, usually 
linear, the connective produced into a small appendage. No hypogynous scales. 
Ovary sessile, with a single or very rarely 2 collateral ovules, pendulous from 
near the apex of the cavity, and orthotropous or slightly amphitropous. Style 
.filiform, either dilated and truncate towards the end under a slender or continu- 
ous and fusiform brush, always glabrous below the brush, the brush usually shortly 
hispid or papillose, at least before the expansion of the flower, with a glabrous 
tip and terminal stigma. Fruit a small dry and indehiscent nut, usually com- 
pressed, sometimes winged with a coma of long hairs on the margins or from the 
base only or also on one very rarely on both faces.— Shrubs with rigid entire or 
divided leaves, terete or if flat usually narrow. Flowers usually white or yellow, 
in dense spikes or cones, each flower sessile within a bract or scale ; the cones 
globular ovoid oblong or rarely cylindrical, terminal or rarely axillary, the 
receptacle or rhachis woolly and usually cylindrical, the scales broad and 
hardened after flowering, persistent, at least at the base, and imbricate but not 
so closely so as in lsopogon, opening for the emission of the fruit, the thinner 
points of the scales often falling off after flowering. At the base of the cone 
are also several imbricate empty bracts forming an involucre sometimes larger 
than the scales and concealing them, usually smaller, persistent or deciduous. 
In several species new leaves and shoots form in the axils of the innermost of 
these empty bracts, which ultimately fall away, leaving the old cones sessile in 
•the forks of the branches wuthout empty outer bracts. Nuts usually shorter than 
the scales, the points rarely but the coma frequently protruding. 
The genus is limited to extratropical Australia and is chiefly Western. Like the closely 
allied Isopogon, it differs chiefly from the South African genera of the same tribe in the absence 
of hypogynous scales. The part of the style which is here termed the brush, is usually 
considered as an upper article of the stigma, but I have never observed any real articulation 
separating it from the rest of the style, and it does not appear to be ever stigmatic except at the 
point. — Benth. 
Sect. 5. Petrophyle . — Leaves divided or rarely simple, the segments usually terete. 
Cones terminal or also axillary. Perianth-segments falling off separately . Style continuous, 
fusiform. 
Leaves more than l^in. long, segments terete, usually 2 or 3 at the end of 
the branches, often axillary when old. 
Cones pedunculate. Perianth glabrous 1. P. pedunculata. 
Cones pedunculate. Perianth silky-villous 2. P. Shirleyce. 
Cones sessile. Perianth silky-villous. 
Foliage glabrous. Cones oblong 3. P. pulchella. 
Young shoots silky or hoary. Cones ovoid 4. P. sessilis. 
1. 3?. pedunculata (pedunculate), R. Br. in Trans. Linn. Soc. x. 70, 
Prod. 364 ; Benth. FI. Austr. v. 332. A tall glabrous shrub. Leaves pinnate 
with much divided 2-3-chotomous pinnte, the ultimate segments numerous, 
rather fine, rigid but not pungent, terete and grooved above. Cones axillary, 
ovoid or oblong, f to lin. long, on peduncles of J to |in. with small empty bracts 
at the base of the peduncle. Cone-scales glabrous, broad, hard, with a short 
persistent erect point. Perianth glabrous, about 5 lines long, the segments 
falling off separately. Style-end continuous, fusiform, angular, minutely- 
pubescent or glabrous. Nut broad, the margins comose, both faces glabrous. 
Aleissn. in DC. Prod. xiv. 269 ; Guillem. Ic. PI. Austral, t. 18. 
Hab.: Southern coastal localities, Eev. B. Scortechini. 
Pabt IV. v 
