| 283] Burseraceae, Buxaceae. Cactaceae 301 
Acanthoripsalis micrantha (Vaupel) Britt. et Rose |. c. p. 211 (= Cereus 
micranthus Vaupel). — Südöstl. Peru. 
A. crenata (Britt.) Britt. et Rose 1. c. p. 212. Fig. 212 (= Hariota crenata 
Britt.). — Bolivia (Rusby n. 2047). 
A. monacantha (Griseb.) Britt. et Rose l. c. p. 212. Textfig. 213 (= Rhipsalis 
monacantha Griseb. = Hariota monacantha Ktze.). — Argentina (J. A. 
Shafer n. 56). 
Aneistrocaetus Britt. et Rose gen. nov., The Cactaceae IV (1923) p. 3. 
Type species Echinocactus megarhizus Rose. 
A. megarhizus (Rose) Bnitt. et Rose l. ce. p. 4. Textfig. 1. — Mexico. 
A. Scheeri (Salm-Dyck) Britt. et Rose l. c. p. 4. Pl. II. Fig. 2. Textfig. 2 
(= Echinocactus Scheeri Salm-Dyck). — Texas and Northern Mexico. 
A. brevihamatus (Engelm.) Britt. et Rose l. ce. p. 5. Textfig. 3 (= Echinocactus 
brevihamatus Engelm. = E. Scheeri var. brevihamatus Weber). — Texas. 
Arequipa Britton et Rose gen. nov., The Cactaceae III (1922) p. 100. 
Type species: Echinocactus leucotrichus Philippi. The genus as here 
treated consists of two species, one of which has heretofore appeared 
under several specifie names, sometimes in Echinocactus and sometimes 
in Echinopsis, although it has little in common with either genus and, 
especially, as these genera are now understood. Arequipa is characterized 
by its slender, elongated, scarlet flower. The generic name is that 
of the city in Peru near which the type species is feund in great 
abundance. 
A.leucotricha (Phil.) Britt. et Rose 1. ec. p. 101 (= Echinocactus leucotrichus 
Phil. = E. clavatus Söhrens = Echinopsis Hempeliana Gürke = Echino- 
cactus Rettigii Quehl). — Chile, Peru. 
A. myriacantha (V aupel) Britt. et Rosel. c.p. 101 (= Echinocactus myriacanthus 
Vaupel). — Peru. 
Astrophytum capricorne (Dietr.) Britt. et Rose, Cactaceae III (1922) p. 184. 
Pl. XXI. Fig. 1. — Mexico. 
Austrocaetus Britton et Rose gen. nov., The Cactaceae III (1922) p. 44. 
Type Species Cereus Bertinii Cels. 
A. Bertinii (Cels.) Britt. et Rose 1. c. p. 44. Textfig. 56 (= Cereus Bertinii 
Cels.). — Argentina. 
Aylostera Speg. nov. gen., Breves notas cactologieas in Anal. Soc. Cientif. 
Argentina XCVI (1923) p. 75. | 
A. pseudominuscula Speg. 1. e. p. 75 (= Echinocactus pseudominusculus Speg. 
in litt. et adumbr. = Echinopsis pseudominuscula Speg., Cact. plat. tent., 
n.45 — Rebutia pseudominuscula Britt. et Rose). 
Bartschella Britt. et Rose gen. nov., The Cactaceae IV (1923) p. 57. 
Type species: Mamillaria Schumannii Hildm. 
B. Schumannii (Hildm.) Britt. et Rose l. ce. p. 58. Pl. VII. Fig. 6. Textfig. 55. 
(= Mammillaria Schumannii Hildm. = M. venusta Brandegee). — Lower 
California. 
Binghamia multangularis (Willd.) Britt. et Rose, The Cactaceae IV. App. 
(1923) p. 279. Textfig. 255 (= Cactus multangularis Willd. — Cereus 
multangularis Haw. — Echinocereus multangularis Rumpl. = Cephalo- 
cereus melanostele Vaupel = Binghamia melanostele Britt. et Rose). 
Borzicactus Fieldianus Britt. et Rose, The Caetaceae IV. App. (1923) 
p-. 278. Textfig. 250—254. — Peru (Macbride et Featherstone n. 2519). 
