GNAPHALIUM AND XERAKTHEMUM. 553 
culum parvum, favosum, Flosculi omnes hermaphroditi, 
tubulosi, 5-dentati. Anther cb basi biset^ : setis obtusis, 
nudis. Stigmata linearia, truncata. Pappus niveus, cadu- 
cus : radiis basi solutis, apice penicillatis. 
Frutices (Africss australis) humiles, lanati, erecti. Folia 
sparsa^ mucronulata^ integerrima, sessilia, coriacea. Flo- 
res terminales^fasckulato-corymhosi, pulchri, albi aut pur- 
purei. 
1. P. coronata^ foliis lanceolatis, radio concolori. 
Gnaphalium coronatum, Linn. Sp. Fl. 1191 — Thunb. Prod. 149.— 
WiUd. 1. c. 3. p. 1854. 
Hah. ad Promontorium Bonae Spei, in declivitate Montis 
Tabularii. Niven, Joannes Roxburgh, b. Floret Octobri 
et Novembri. (v. s. sp. in Herb. Lamb.) 
Fruticulus caespitosus, palmaris. Flores fasciculatim co- 
rymbosi : radio niveo. 
% P. bicolor, foliis spathulatis, radio bicolori. 
Hah. in Capite Bonag Spei. J. Roxburgh. f>. (v. s. sp. 
in Herb. Lamb.) 
Prcecedenti similis. Involucri radius purpureus et ni- 
veus. 
The genus Petalacte is essentially distinguished by ha- 
ving a simple involucrum, whose leasts are of equal length, 
and furnished at the top with a broad, orbicular, coloured 
lamina, which give the flowers some distant resemblance to 
those of Achillea Ptarmica. The pappus is caducous, with 
the rays unconnected at the base. The setae at the base of 
the anthers are naked and obtuse. The name alludes to 
the petalifo»m rays of the involucrum, and is derived from 
srerfltAflc, petalum, and ecKryi, radius. 
