ECHINOCEREUS. 
13 
Echinocereus acifer was mentioned by Lemaire in 1868 (Les Cactees 57), but the 
name was not published at that place. 
Illustrations : Monatsschr. Kakteenk. 1: opp. 44, as Echinocereus acifer trichacanthus; 
Forster, Handb. Cact. ed. 2. 637. f. 85; (?) Gartenflora 1: pi. 29, as Echinopsis valida 
densa; (?) Bliihende Kakteen 2: pi. 106; Gartenwelt 9: 410; Gard. Chron. III. 36: 245. 
f. 100. 
12 . Echinocereus octacanthus (Miihlenpfordt). 
Echinopsis octacantha Miihlenpfordt, Allg. Gartenz. 16: 19. 1848. 
Cereus roemeri Engelmann in Gray, PI. Fendl. 50. 1849. Not Miihlenpfordt, 1848. 
Echinocereus roemeri Riimpler in Forster, Handb. Cact. ed. 2. 792. 1885. 
Cereus octacanthus Coulter, Contr. U. S. Nat. Herb. 3: 395. 1896. 
Cespitose, with many simple joints; joints ovoid, yellowish green, 7 to 10 cm. long, 5 to 7 cm. in 
diameter; ribs 7 to 9, obtuse, somewhat tubercled; areoles when young white-woolly, in age naked, 
8 to 16 mm. apart; spines rigid, grayish brown; radial spines 7 or 8, 10 to 24 mm. long; central spine 
solitary, stouter than the radials, porrect, 2 to 3 cm. long; flowers red, 5 cm. long, remaining open for 
several days; fruit unknown. 
Type locality: Northern Texas. 
Distribution: Known to us definitely only from northwestern Texas, but reported by 
Coulter from New Mexico and Utah. 
M. Cary in 1907 collected at Dolores, Colorado, a plant which comes nearer this 
species than anything which we have seen, except a plant from Marathon, Texas, which 
has the armament and flowers called for by the original description. The plant referred 
to in the following illustration in the Garden is said to have come from northern Califor¬ 
nia but this is undoubtedly an error. 
Illustrations: Hort. Franc. II. 7: pi. 22; Garden 13: 291, as Cereus roemeri. 
13 . Echinocereus neo-mexicanus Standley, Bull. Torr. Club 35: 87. 1908. 
Cespitose, but with only a few stout simple joints, 18 to 25 cm. long, 7 cm. in diameter, obtuse, 
glaucous-green; ribs 11 or 12, obtuse, low, somewhat tuberculate; areoles 1 to 1.5 cm. apart; spines 
slender, subulate, somewhat spreading; radial spines 13 to 16, the longest only 1.5 cm. long, white 
or nearly so; central spines 6, the lowest one yellowish to almost white, the others reddish, sometimes 
4 cm. long; flowers abundant, appearing near the top or along the sides of the plant, 5 cm. long, 
narrow and not spreading at the mouth, bright scarlet; perianth-segments acute, firm in texture, 
2 cm. long, 6 mm. broad; stamens about half as long as the style; stigma-lobes 7; ovary and flower- 
tube bearing clusters of bristly spines; fruit not known. 
Type locality: Mesa west of the Organ Mountains, New Mexico. 
Distribution: Known only from the type locality. 
Illustrations: Bull. Torr. Club 35: f. 3, 4, 5. 
Figure 10 is copied from the illustration above cited. 
14 . Echinocereus conoideus (Engelmann and Bigelow) Riimpler in Forster, Handb. Cact. ed. 2. 
807. 1885. 
Cereus conoideus Engelmann and Bigelow, Proc. Amer. Acad. 3: 284. 1856. 
Echinocereus phoeniceus conoideus Schumann, Gesamtb. Kakteen 283. 1898. 
Plants cespitose; joints somewhat conic at apex; ribs 9 to n; radial spines 10 to 12, slender, 
rigid; central spines 2.5 to 8 cm. long, generally 5 cm. long; flowers 6 cm. long, scarlet, slender; 
ovary and flower-tube spiny. 
Type locality: On the Upper Pecos, New Mexico. 
Distribution: Southeastern New Mexico and western Texas. 
The species is closely related to Echinocereus coccineus, perhaps not specifically dis¬ 
tinct from it. 
Coulter takes for this species the name Cereus roemeri Miihlenpfordt (Allg. Gartenz. 
16: 19. 1848), which we refer to E. coccineus. 
