528 CACTACEA, 
Mamillaria, sp. (aff. MU. formose), Scheer in Seem. Bot. Voy. ‘ Herald,’ p. 287. 
Nortu Mexico, near Chihuahua (Potts). 
Mawillaria, sp. Scheer in Seem. Bot. Voy. ‘Herald,’ p. 287. 
Norru Mexico, near Chihuahua (Potts, 226). 
3. PELECYPHORA. 
Pelecyphora, Ehrb. in Bot. Zeit. i. p. 737 ; Benth. et Hook. Gen. Plant. i. p. 848. 
Only one species described. 
1. Pelecyphora ascelliformis, Ehrb. in Bot. Zeit. i. p. 737. 
Mexico (Ehrenberg). 
4, LEUCHTENBERGIA. 
Leuchtenbergia, Hook. Bot. Mag. sub tab. 4393 ; Benth. et Hook. Gen. Plant. i. p. 848. 
_ Monotypic. 
1. Leuchtenbergia principis, Hook. Bot. Mag. t. 4393. 
SoutH Mexico, neighbourhood of Real del Monte (Taylor). 
5. ECHINOCACTUS. 
Echinocactus, Link et Otto in Verhandl. Preuss. Gartenb. Verein, iii. p. 420, t. 13 ad 20, 22 ad 24, 
26 et 27; Benth. et Hook. Gen. Plant. i. p. 848. 
About 200 forms have been described. They are dispersed from Texas and California 
to Peru and Brazil, but are most numerous in Mexico. 
1. Echinocactus acifer, Hopf., ex Labour. Cact, p. 226. 
Echinocactus wippermannii, Miihlpf. in Otto & Dietr. Allg. Gartz. 1845, p. 870, ex Labour, loc. cit. 
Echinocactus spinosus, Wegener in Otto & Dietr. Allg. Gartz. 1844, p. 66, ex Labour. loc. cit. 
Mexico, Real del Monte (ex Labvouret), several varieties growing in red lava near 
Estanijas (Lhrenberg). 
Salm Dyck (Cact. ed. 2, p. 162) maintains the name FE. wippermannii, Mihipf. 
2, Echinocactus acroacanthus, Stieber in Bot. Zeit. v. p. 491. 
MEXICco. 
3. Echinocactus adversispinus, Miihlpf. in Otto & Dietr. Allg. Gartz. xvi. 
p. 10; Walp. Ann. ii. p. 682. 
MExIco. 
4. Echinocactus albatus, A. Dietr. in Otto & Dietr. Allg. Gartz. xiv. p. 170. 
MEXICO. 
5. Echinocactus allardtianus, A. Dietr. in Otto & Dietr. Allg. Gartz. xv. 
p. 178. 
MEXIco. 
