24 
the; cactaceiae:. 
Cereus pectinatus armatus Poselger, Allg. Gartenz. 21: 134. 1853. 
Cereus pectinatus spinosus Coulter, Contr. U. S. Nat. Herb. 3: 387. 1896. 
Cereus adustus radians Coulter, Contr. U. S. Nat. Herb. 3: 387. 1896. 
Echinocereus pectinatus adustus Schumann, Gesamtb. Kakteen 271. 1898. 
Echinocereus pectinatus armatus Schumann, Gesamtb. Kakteen 271. 1898. 
Echinocereus pectinatus rufispinus Schumann, Gesamtb. Kakteen 272. 1898. 
Simple, short-cylindric, often only 4 to 6 cm. high; ribs 13 to 15; areoles closely set, elliptic; 
radial spines 16 to 20, appressed-pectinate, pale; the central spines wanting or solitary, sometimes 
elongated and porrect; flowers purplish, 3 to 4 cm. long; inner perianth-segments narrow; ovary and 
calyx-tube covered with clusters of short brown spines and long wool. 
Type locality: Cosihuiriachi, Chihauhua. 
Distribution: Mountains near type locality. 
Figure 22 is from a photograph of a plant collected by Dr. Rose at the type locality 
in 1908. 
Fig. 22. —Echinocereus adustus. Fig. 23. —Echinocereus standleyi. 
31. Echinocereus standleyi sp. nov. 
Nearly globular or short-cylindric, 4 to 5 cm. in diameter; ribs 12 ; areoles elongated, closely set; 
radial spines about 16, stoutish, whitish but yellow at base; central spine one, similar to but much 
larger and stouter than the radials, 2 to 2.5 cm. long, porrect. 
Collected by Mrs. S. L. Pattison in the Sacramento Mountains, New Mexico, and 
obtained from her by Mr. Paul C. Standley in 1906. 
It is a little known species, resembling Echinocereus adustus and E. viridiflorus, but 
with different spines; neither flower nor fruit has been obtained. 
Figure 23 is from a photograph of the type specimen, preserved in the U. S. National 
Herbarium. 
32 . Echinocereus perbellus sp. nov. 
Stem either simple or clustered, 5 to 10 cm. high; ribs 15, low and broad; distance between the 
areoles about equal to the length of the areoles themselves; areoles elongated; spines all radials, 
12 to 15, spreading but not widely, 5 to 7 mm. long, pale brown to reddish or nearly white below; 
flowers purple, 4 to 6 cm. long; perianth-segments broad, oblong to oblanceolate, acuminate, nearly 
4 cm. long; areoles on flower-tube very woolly as well as spiny. 
