SHIN 
Echinopsis of columnar type. 
Members of Ec'r.inoeeranae. 
Echinopsis eyriesii 
Upper—Ariocarpus furfuraceus. At right in flower—A. trigonus. 
Lower—Ariocarpus retusus. 
19 
R CACTUS NURSERY 
Ariocarpus trigonus. 
An exceptionally handsome specimen. 
Ariocarpus fissuratus—growing almost flat as in 
Nature. 
Ariocarpus fissuratus taller 
globular in cultivation Aztekium ritteri—a very rare Mexican species. 
Echinopsis—All South American. Some grew very tall, others remain globular. All have 
very beautiful flowers ranging from white to yellow and pink, growing on long, hairy tubes. 
Echinopsis eyriesii—S. Brazil, Uruguay. Globular, simple or clustered. Large white 
flower. 
SUBTRIBE IV. ECHINOCACTANAE of 28 Genera 
Ariocarpus trigonus—Central and Western Tamaulipas. Grows on slate hillsides, almost 
buried. Much trampled by goats. Very rare in collections. Flower yellow. 
Ariocarpus fissuratus—S. W. Texas, N. W. Coahuila, Mexico. Plant flat or somewhat 
rounded; tubercles imbricated with surfaces more or less fissured and irregularly warty. Flowers 
in Fall, pink. Perfectly named the “Living Rock”. 
Ariocarpus furfuraceus—Western Coahuila. Tubercles more rounded, rougher with a 
woolly areole near the tip. Flower white. 
Ariocarpus retusus—San Luis Potosi. Plants globular, very woolly at the center; tuber¬ 
cles horny, 3 angled, flat. Flower white. 
Aztekium ritteri—Nuevo Leon, Mexico. A monotypic. Found as small plant or clusters 
3-5 heads. Seldom over 2 inches in diameter. Flattened depressed center; 8-13 ribs; woolly center; 
areoles very approximate. Flower small, white with pinkish median stripe. Very rare in collec¬ 
tions. 
