316 



Catalogue of the Cacti 



91 species nova ; white, numerous, 



and straight spines, 5 in. high, 

 and 2^ in. in diameter. 



92 erecta. 9 in, high, and 2 in. in 



diam. — Syn. M. evanescens, 



§ ii. Heads ovate or globular. Teats 

 ovate, co7)ipressed, channeled. 



93 elephantidens. 3 in. high, and 



2iin, in diameter. 

 94' recurva. 3 in. high, and 2^ in. 



in diameter. 

 95 impexicoma. 3i in. high, and 



4 in. in diameter. — Syn. M. 

 radians. 



96 scepontocentra. 3 in. high, and 



4^ in. in diameter. 



^ iii. Teats most robust, shorter, and 

 broadly lobed, 



97 latimamraa. 3 in. high, and 6 in. 



in diameter. 



98 pycnacantha. 4 in. high, and 



4 in. in diameter. 



99 species nova. 3 in. high, and 



5 in. in diameter. 



Genus III. ECHINOCA'CTUS. 



Surface angled or furrovred. Flowers short and broad, produced at the 

 fascicles of spines, generally at the umbilicus at the top of the plant. 

 Capside dry, generally concealed in an especial envelope of down, or else in 

 the tomentum of the umbilicus. Fascicles of spines downy; down confined 

 to the fascicles. 



Sect. I. ScoPiE'iE. 



scopa. 14 in. 

 in diameter. 



Cereus 



Syn 

 scopa ; Cactus scopa. 



2 s. 2 Candida. 8 in. high, and 2 in. 



in diameter. 



3 s. 3 cristata. 3 in. high, and 3 in. 



long. — Syn. E. scopa mon- 

 strosa. 



4 pectinlfera. 4^ in. high, and 3in. 



Angles small and shalloiu. Spines slender and numerous. 

 Fascicles small and prominent. 



high, and 4 in. in diameter. — Syn. Echinocac- 



tuspectinata; Eciiinocactus pec- 

 tinifera. 



5 p. var. rubrospina. 2^ in. high, 

 and 2i in. in diameter. 



6 pumila. 1 in. high, and 1 in. in 

 diameter. 



7 gracillima. Sin. high, and ^in. 

 in diameter. 



Sect. II. GiBBO^S^. — Angles larger than those of the last section, fonned of 

 gibbous tzibercles, confluent at their bases, having an acute tubercle at the 

 bottom of each fascicle. 



8 exsculpta. 6iin. high, and 2|-in. 

 in diameter. — Syn. E. sub- 

 gibbosa ; E. acanthion-inter- 

 rupta ; E. crenata ; Cereus 

 montevidensis. 



9. hybocentra. 9 in. high, and 5 in. 

 in diameter. 



10 ignota nova. 8 in. high, and 5 in. 



in diameter. 



1 1 gibbosa. 3 in. high, 4 in. diam. 



— Syn.] Cereus gibbosus. 



12 g. var. nobilis. 7 in. high, and 



44 in. in diameter. 



13 centeteria. 2 J in. high, and .3J in. 



in diameter. 



14 ceratistes. 2^ in. high, and 3 in. 



in diameter. 



15 pachycentra. 2^ in. high, and 



3i in. in diameter. 



16 MontiviM. 2^ in. high, and 4 in. 



in diameter. 



17 hyptiacantha. 2^ in. high, and 



2iin. in diameter. 



18 denudata. 2^ in. high, and 3iin. 



in diameter. — Syn. £'chinops 

 denudatus. 



Sect. III. Angles small, obtuse ; having a teat, or prominence, between the 



fascicles. 



Subsect. 1. Mammulo^s^. I 4^ in. in diameter. — Syn. E. 



19 manmiulosa. 4^ in. high, and ' hypocrateriformis. 



