12 THE CACTACEAE. 
lacking in the other species. The distribution of this species is much more restricted than 
has usually been given for it; it has been reported from Texas to California and as far 
south as La Paz, Lower California. The plant illustrated on plate 66 of Blithende Kak- 
teen as this species must be referred elsewhere. 
Illustrations: Tribune Hort. 4: pl. 139, as Echinocereus polyacanthus var.; Forster, 
Handb. Cact. ed. 2. f. 101; (?) Monatsschr. Kakteenk. 15: 41; (?) 17: 169; Schelle, Handb. 
Kakteenk. 139. f. 67; Shreve, Veg. Des. Mt. Range pl. 24; Bull. Torr. Club 35: 83. f. 1; 
Cact. Journ. 1: 89. 
Figure 8 shows a flower of an herbarium specimen collected by Dr. Palmer near Madera, 
Chihuahua, in 1908; figure 12 is from a photograph of a plant collected by Professor Lloyd 
in the Santa Catalina Mountains, Arizona. 
10. Echinocereus pacificus (Engelmann). 
Cereus phoeniceus pacificus Engelmann, West Amer. Sci. 2: 46. 1886. 
Cereus pacificus Coulter, Contr. U. S. Nat. Herb. 3: 397. 1896. ‘ 
Cespitose, growing in clumps 30 to 60 cm. in diameter, sometimes containing 100 stems, 
these 15 to 25 cm. long, 5 to 6 cm. in diameter; ribs 10 to 12, obtuse; spines gray, with a reddish 
tinge; radial spines 10 to 12, 5 to 10 mm. long; central spines 4 or 5, the longest sometimes 25 mm. 
long; flowers deep red, rather small, about 3 cm. long; areoles on ovary and flower-tube bearing long 
tawny wool and reddish-brown bristly spines; fruit spiny. 
Type locality: Todos Santos Bay, Lower California. 
Distribution: Northern Lower California, recorded, apparently erroneously, from farther 
south. 
Although the type is from the coastal hills we are inclined to refer here Mr. Brande- 
gee’s plant from the San Pedro Martir, collected May 5, 1893; the specimen shows flowers 
and a spine-cluster. 
Mr. Brandegee’s plant from Comondu Cliffs, also referred here by Coulter, may belong 
elsewhere; it is without flowers, however, aiid we are uncertain of its relationship. The 
spines are long and acicular and Mr. Brandegee’s notes state that the stems are not dense 
but sometimes hang from the rocks. 
Figure 9 shows a small flowering branch of an herbarium specimen collected by C. R. 
Orcutt in northern Lower California in 1883. 
11. Echinocereus acifer (Otto) Lemaire in Férster, Handb. Cact. ed. 2. 798. 1885. 
Cereus acifer Otto in Salm-Dyck, Cact. Hort. Dyck. 1849. 189. 1850. 
? Echinopsis valida densa Regel, Gartenflora 1: 205. 18 a ° . 
Echinocereus acifer tenuispinus Jacobi in Férster, Handb. Cact. ed. 2. 798. 1885. 
Echinocereus acifer brevispinulus Jacobi in Forster, Handb. Cact. ed. 2. 798. 1885. 
Echinocereus durangensis Riimpler in Férster, Handb. Cact. ed. 2. 799. 1885. 
Echinocereus durangensis nigrispinus Riimpler in Férster, Handb. Cact. ed. 2. 800. 1885. 
Echinocereus durangensis rufispinus Riimpler in Férster, Handb. Cact. ed. 2. 800. 1885. 
Echinocereus acifer trichacanthus Hildmann, Monatsschr. Kakteenk. 1: 44. 1891. 
Echinocereus acifer durangensis Schumann, Gesamtb. Kakteen 287. 1898. 
Echinocereus acifer diversispinus Schumann, Gesamtb. Kakteen 287. 18098. 
Cespitose, gloss 
long, pale brow 
brown, the thre 
Ossy green, erect; ribs 10, strongly tubercled; radial spines 5 to 10, 10 to 16 mm. 
nish, bulbose and purplish at base; centrals 4 (Schumann says 1), stout, purplish 
€ upper erect, the lower and stouter one subdeflexed; flowers scarlet. 
Type locality: Not cited. 
Distribution: Durango and Coahuila, according to Professor Schumann. 
Professor Schumann recognized three varieties, based chiefly on the differences in 
the spines. 
We have studied a small plant secured from the Berlin Botanical Garden. 
« The illustration in Blithende Kakteen cited below shows a plant with almost con- 
inuous ribs and one stout central spine. It presumably represents a different species. 
