) 
311] Cactaceae 329 
Neomammillaria umbrina (Ehrenb.) Britt. et Rose 1. ec. p. 164 (= Mammil- 
laria umbrina Ehrenb. — Cactus umbrinus Ktze.). — Mexico. 
N. Verhaertiana (Bödeker) Britt. et Rose l. ec. p. 164 (= Mammillaria Ver- 
haertiana Bödeker). — Mexico. 
N. xanthina Britt. et Rose. c. p. 164. Textfig. 184. — Mexico (Reko n. 4401). 
Neoporteria Britt. et Rose gen. nov., The Cactaceae III. (1922) p. 94. 
There are several species along the coast and mountains of Chile 
of which Echinocactus subgibbosus Haworth is selected as the type. In 
Schumann’s keys one would look for these species in his subgenus Noto- 
cactus of Echinocactus but, as a matter of fact, most of them have been 
assigned to the subgenus Aybocactus. The group as treated here is. a 
natural one and deserves separation as a genus. Doubtless, still other 
species will be assigned here when better known. From Malacocarpus, 
to which we have referred most of Schumann’s species grouped by him 
in Notocactus, it differs in its fruit, seeds, and in the shape and color of 
the flowers. 
N. nidus (Söhrens) Britt. et Rose l. ec. p. 94. Textfig. 103 (= Echinocactus 
sessilis Philippi = E. nidus Söhrens). — Chile. 
N. occulta (Philippi) Britt. et Rose 1. c. p. 95. Textfig. 104 (= Echinocactus 
occultus Philippi). — Chile. 
N. niericans (Linke) Britt. et Rose 1. ec. p. 95. Textfig. 105 (= Echinopsis 
nigricans Linke —= Echinocactus nigricans Dietr.). — Chile or Bolivia. 
N. Jussieui (Monville) Britt. et Rose l. ec. p. 96. Textfig. 107 (= Echinocactus 
Jussieui Monville). — Chile. 
N. subgibbosa (Haworth) Britt. et Rose l. e. p. 97. Pl. VIII. Fig. 4 (= Echino- 
cactus subgibbosus Haw. — Cactus Berteri Colla — Echinocactus acutissimus 
Otto et Dietr. = E. exsculptus Orto = Cereus dichrocanthus Mart. — 
Mammillaria atrata Hook.—=M. floribunda Hook. = Echinocactusthrincogonus 
Lemaire = E. thrincogonus var. elatior Lemaire =E. Berteri Remy =E. 
rostratus Jacobi — Cactus atratus Kuntze = C. floribundus Ktze.). 
N. cchilensis (Hildm.) Britt et Rose]. c.p. 99. Textfigur 108. (= Echino- 
cactus chilensis Hildm.). — Chile. 
N. fusca (Mühlenpf.) Britt. et Rose. c. p. 99. Textfig. 106 (= Echinocactus fuscus 
Mühlenpf. = E. ebenacanthus Monville = E. humilis Rümpler). — Chile. 
Nopalxochia Britt. et Rose gen. nov., The Cactaceae IV (1923) p. 204. 
Type species: Cactus phyllantoides DC. 
N. phyllanthoides (DC.) Britt. et Rose l. c. p. 205. Fig. 207 (= Cactus phyllan- 
thoides DC. — Cactus speciosus Bonpl. = Epiphyllum speciosum Haw. 
— Cactus elegans Link = Epiphyllum phyllanthoides Sweet = Cereus 
phyllanthoides DC. = Phyllocactus phyllanthoides Link = Opuntia speciosa 
Steud.). — Mexico. 
Opuntia compressa (Salisb.) Macbr. in Contrib. Gray Herb. Harv. Univ. N.S. 
LXV (1922) p. 41 (= Cactus OpuntiaL. — C. compressus Salisb. = Opuntia 
Opuntia |L.] Karsten). — N. America. 
O. molinensis Speg. in Breves notas cactologicas in Anal. Soe. Cientif. Argen- 
tina XCVI (1923) p. 63 (= O. Schumanni Speg. [non Web.] [Cact. plat. 
tent. n. 106)). 
OÖ. atrovirens Speg. in Nuevas notas cactologicas in Anal. Soc. Cientif. Argen- 
tina XCIX (1925) p. 91. — En los montes de la costa del Uruguay en 
la provincia de Corrientes. 
