PROTEACE M. 423 
40. Petrophila R. Br.i—Flowers nearly of Mvenia ; hypogynous 
squamules 0. Germen sessile; ovule 1, laterally inserted, hemitro- 
pous or descending suborthotropous; style slender; persistent at 
base; fusiform at apex, or thickened below apex, and constricted 
articulate at middle; hispidulous all over, or at apex. Nutlet 
winged or wingless, compressed, pilose on belly, base, or margin ; 
l-seeded.—Shrubs; leaves alternate, terete-filiform, rarely flat; 
flowers’ capitate ; capitula axillary and terminal, globose or ovoid, 
rarely cylindrical; bracts indurated, persistent, free or connate’ 
(Australia). 
4]. Isopogon R. Br.'—Flowers nearly of Petrophila ; style slen- 
der, cylindrical, or fusiform, continuous or dilated below apex, 
usually constricted articulate at middle, sometimes glabrous, some- 
times puberulous on lower joint. Nut sessile, wingless, hairy all 
over, 1-seeded.—Shrubs ; leaves alternate, rigid, terete or flat; 
flowers capitate; capitula strobiliform, terminal, or axillary ; highest 
leaves approximated subverticillate, involucrating capitula’ (Aus- 
tralia’). 
42. Spatalla Saxiss.'.—Flowers irregular, hermaphrodite; peri- 
anth-leaves 4, unequal deciduous, dilated at antheriferous apex; 
upper leaf usually largest. 
Stamens 4; filaments short ; 
anthers 
Suppl., iv. 570 (Protea).—Anpn., Bot. Repos., 
t. 264, 349, 447, 507, 512.—Ra@m. & Scu., 
Syst., iii. 375.—Lovup., Encycl., ed. 1, 82. 
1In Trans. Linn. Soc., x. 48, 67; Prodr., 
363 ; Suppl, 1.— Enpz., Gen, n. 2121.— 
Meissn., Prodr., 267.— Petrophile Kn. & 
Saiss., Prot., 92.—Atylus Saxiss. (part.). 
2 White or yellow, often silky-villous. 
3 Sections 4, according to ENDLICHER, viz. :— 
1. Arthrostigma, stigma articulate; nut comose 
inside and on narrowed margins; fruit distinct 
from scales. 2. Petrophile, stigma not articu- 
late ; nut and scales as in Arthrostigma. 3. 
Symphyolepis, stigma not articulate ; fruits 
samaroid ; scales connate. 4. Xerostole, stigma 
not articulate; fruits samaroid ; scales distinct. 
4 Species about 50, Linpu., Swan Riv., App., 
35.—MEIssn., in Pl, Preiss., i. 495; ii. 246; in 
Hook. Journ.(1855), 67.—Kirr., in Hook. Journ. 
(1855), 67.—F. Murny., Fragm., vi. 242, 255.— 
Beytu. & F. Mvett., Fl, Austr., v. 319. 
5 In Trans. Linn. Soc., x. 48, 70; Prodr., 
365; Suppl. 7.—Kwn. & Sauiss., Prot., 93.— 
Ewvi., Gen., n. 2122.—Mutssn., Prodr., 276.— 
Atylus Sauiss., loe. cit. (part.). 
6 A genus very near Petrophila. F. MUELLER 
has admirably distinguished these genera nearly 
as follows (#ragm., vi. 246). Calyx often parted 
into sepals in Petrophila, never in Isopogon. 
Tube wholly deciduous in Petrophila, persisting 
nearly to maturity in Isopogon. Bracts growing 
woody in Petrophila, not in Isopogon. Fruit 
compressed ciliate in Petrophila, equally turges- 
cent, villous at base and all over in Jsopogon. 
Base of style slender and breaking off in Jso- 
pogon, strong persistent in Petrophila. Peri- 
carp of Zsopogon membranous, of Petrophila 
crustaceous or cartilaginous. Cotyledons broader 
in Petrophila, in Isopogon longer and ovate or 
elliptical. 
7 Species about 30. Linpn, in Bot. Reg. 
(1842), Mise. Not., 39; Swan Riv. 34.— 
Muissn., in Pl. Preiss., i. 504; in Hook. 
Journ. (1852), 182; (1855), 69.—F. MUELL., 
Fragm., vi. 236.— Buntu. & F, Mvsz., Fl. 
Austr., v. 336. 
: Par. Lond., 67 (part.).—R. Br., in Trans, 
Linn. Soe., x. 48, 143.—ENDL., Gein n. 2129. 
—Matssn., Prodr., 306. 
