230 Mr. D. Don's Descriptions of new Genera and Species 



lanceolate acutd terminatae, basi biaristatae : aristis line- 

 ari-lanceolatis, deorsum attenuatis. Stigma bifidum : lobis 

 lineari-cuneatis, truncatis, piano-con vexis, minute papillosis, 

 revolutis. Achenia exteriora cuneato-oblonga, papilloso- 

 scabra ; flosculis ver6 majoribus (interioribus) longiora, 

 subtetragona. Pappus difFormis ; achenio exteriori brevis- 

 simus, setaceus, denticulatus, basi solute caducus, fusco- 

 cinereus : interiori vero elongatus, plumosus, niveus, invo- 

 lucellum superans, subpersistens, radiis basi crassiore con- 

 ferruminatis, apice mucronulo simplici. 

 Herba habitu omnino Echinopsidis, land nived mollissimd densi 

 obruta. Caulis cubitalis, erectus, ramosus, teres. Folia al- 

 terna, basi auriculatd ample xicaulia, palmaria, runcinato- 

 pinnatijida, vix ultrd, semunciam lata, supra parcius lanata : 

 segmentis rhombeo-ovatis, dentatis, margine recurvis, mucro- 

 nulo rejlexo-adpresso terminatis. Capitula sphcerica, pedun- 

 culata, corymbosa. Pedunculi erecto-patuli, teretes, lanati, 

 pollicares v. sesquipollicares. Involucella nudiuscula, nitida, 

 sanguineo-colorata. Flosculi rosei. 



1. P. spharocephalus. 



In PeruviA. Ruiz et Pavon. q. 



The capitulum in this genus consists of a congregation of 

 smaller capitula, each containing two flowers. It is precisely 

 analogous to that of Echinops, and may be compared to the 

 compound umbel in other plants. Expansion first takes place 

 in the florets of the apex of the capitulum, as Mr. Brown has 

 already remarked in that of the before-mentioned genus. The 

 compound capitulum, the two unequal florets, each of which is 

 furnished with a distinct kind of pappus, sufficiently distinguish 

 this genus from the following. 



b. Pappo 



