PBOTEACE&. 423 



40. Petrophila R. Br. 1 — Flowers nearly of Nivenia ; 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 ; 

 1-seeded. — Shrubs ; leaves alternate, terete-filiform, rarely flat ; 

 flowers 2 capitate ; capitula axillary and terminal, globose or ovoid, 

 rarely cylindrical ; bracts indurated, persistent, free or connate' 

 (Australia*). 



41. Isopogon E,. Br. 5 — 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 5 {Aus- 

 tralia') . 



42. Spatalla Salisb. 8 — 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). — Andr., Pot. Repos., 6 A genus very near Petrophila. F. Mueller 



t. 264, 349, 447, 507, 512. — Rcem. & Sch., has admirably distinguished these genera nearly 



Syst., iii. 375. — Loud., Encycl., ed. 1, 82. as follows (Fragm., vi. 246). Calyx often parted 



1 In Trans. Linn. Soc, x. 48, 67 ; Prodr., into sepals in Petrophila, never in Isopogon. 

 363; Suppl., 1. — Endl., Gen., n. 2121. — Tube wholly deciduous in Petrophila, persisting 

 Meissn., Prodr., 267. — Petrophile Kn. & nearly to maturity in Isopogon. Bracts growing 

 Salisb., Prot., 92. — Atylus Salisb. (part.). woody in Petrophila, not in Isopogon. Fruit 



2 White or yellow, often silky-villous. compressed eiliate in Petrophila, equally turges- 



3 Sections 4, according to Endlicher, viz. : — cent, villous at base and all over in Isopogon. 

 1. Arthrostigma, stigma articulate ; nut comose Base of style slender and breaking oft' in Iso- 

 inside and on narrowed margins; fruit distinct pogon, strong persistent in Petrophila. Peri- 

 from scales. 2. Petrophile, stigma not articu- carp of Isopogon membranous, of Petrophila 

 late ; nut and scales as in Arthrostigma. 3. crustaceous or cartilaginous. Cotyledons broader 

 Symphyolepis, stigma not articulate ; fruits in Petrophila, in Isopogon longer and ovate or 

 samaroid ; scales connate. 4. Xerostole, stigma elliptical. 



not articulate ; fruits samaroid ; scales distinct. 'Species about 30. Lindl., in Pot. Peg. 



4 Species about 50. Lindl., Sivan Riv., App., (1842), Misc. Not., 39 ; Swan Riv., 34. — 

 35.— Meissn., in PL Preiss., i. 495 ; ii. 246; in Meissn., in PI. Preiss., i. 501 ; in Hook. 

 Hook. Jowr».(1855), 67. — Kirr.,in Rook. Journ. Journ. (1852), 182; (1855), 69.— F. Muell., 

 (1855), 67.— F. Mtjeil., Fragm., vi. 242, 255.— Fragm., vi. 236.— Benth. & F. Mueli.., PI. 

 Benth. & F. Muell., Ft. Ausir., v. 319. Ausir., v. 336. 



5 In Trans. Linn. Soc, x. 48, 70; Prodr., s Par. Lond., 67 (part.).— R. Br., in Trans. 

 365; Suppl., 7.— Kn. & Salisb., Prot., 93.— Linn. Soc, x. 48, 143.— Endl., Gen., u. 2129. 

 Endl., Gen., n. 2122.— Meissn., Prodr., 276.— —Meissn., Prodr., 306. 



Atylus Salisb., loc. cit. (part.). 



