14 THE CACTACEAE. 
Illustrations: Pac. R. Rep. 4: pl. 4, f. 4, 5, as Cereus conoideus; N. Mex. Agr. Exp. 
Sta. Bull. 78: pl. [17]; Bull. Torr. Club 35: 85. f. 2. 
Figure 11 is copied from the first illustration above cited. 
~>15. Echinocereus coccineus Engelmann in Wislizenus, Mem. Tour North. Mex. 94. 1848. 
Cereus roemeri Mithlenpfordt, Allg. Gartenz. 16: 19. 1848. 
“Cereus coccineus Engelmann in Gray, Pl. Fendl. 50, 51. 1849. Not Salm-Dyck, 1828. 
? Echinopsis valida densa Regel, Gartenflora I: 295. 1852. 
Cereus mojavensis zuniensis Engelmann, Proc. Amer. Acad. 3: 281. 1856. 
Cereus phoeniceus Engelmann, Proc. Amer. Acad. 3: 284. 1856. 
Echinocereus phoeniceus Riimpler in Férster, Handb. Cact. ed. 2.788. 1885. 
Echinocereus phoeniceus albispinus Riimpler in Forster, Handb. Cact. ed. 2. 789. 1885. 
Echinocereus phoeniceus longispinus Riimpler in Férster, Handb. Cact. ed. 2. 789. 1885. 
Echinocereus phoeniceus rufispinus Riimpler in Férster, Handb. Cact. ed. 2. 789. 1885. 
Echinocereus krausei De Smet in Forster, Handb. Cact. ed. 2. 789. 1885. | 
Echinocereus mojavensis zuniensis Riimpler in Forster, Handb. Cact. ed. 2. 803. 1885. i 
Echinocereus phoeniceus inermis Schumann, Monatsschr. Kakteenk. 6: 150. 1896. / 
Echinocereus roemeri Rydberg, Bull. Torr. Club 33: 146. 1906. Not Riimpler, 1885. 
Usually densely cespitose, often forming large mounds a meter in diameter, containing some- 
times 200 simple stems, these 2 dm. high or less, 3 to 5 cm. in diameter; ribs 8 to 11, somewhat 
tubercled; radial spines acicular, 8 to 12, 1 to 2 cm. long, usually white; central spines several, 
longer and stouter than the radials, usually yellowish or whitish but in some specimens reddish or 
blackish; flowers crimson, 5 to 7 cm. long; perianth-segments broad, obtuse or retuse; areoles on 
flower and ovary felted and bearing short white bristly spines. : 
Type locality: About Santa Fé, New Mexico. 
Distribution: New Mexico and Arizona to Utah and Colorado. 
Schumann describes and figures a plant entirely without spines, but whether it is 
common or not we do not know. This was published as a variety, E. phoeniceus inermts 
(Monatsschr. Kakteenk. 6: 150. 1896), but it often passes as E. inermis, although never 
described as such. Some years ago such a plant was sent to Washington from Utah by 
Mr. M. E. Jones and is still growing in the Cactus House, but it has not since flowered. 
Coulter has combined this species with Mammillaria aggregata Engelmann (Emory, 
Mil. Reconn. 157. f. 1.1848) taking both up as Cereus aggregatus Coulter (Contr. U.S. 
Nat. Herb. 3: 396. 1896), but we do not believe that they are the same; Rydberg has used 
the name Echinocereus aggregatus (Bull. Torr. Club 33:146. 1906) for this plant. 
Echinopsis valida densa Regel (Gartenflora 1: pl. 29. 1852; also Férster, Handb. 
Cact. ed. 2. f. 85) is referred by Schumann to both Echinocereus acifer and E. phoeniceus 
(Gesamtb. Kakteen 239, 283). To us it suggests EF. fendleri, although it has differently 
colored flowers. 
Illustrations: ? Gartenflora 1: pl. 29, as Echinopsis valida densa; Gartenwelt 1: 85, 89; 
4: 159, as Cereus phoeniceus; Gartenwelt 1: 89, as Cereus phoeniceus inermis; Gartenwelt 4: 
159, as Echinocereus phoeniceus inermis; Curtis’s Bot. Mag. r10: pl. 6774, as Cereus pauct- 
spinus (fide Schumann) ; Pac. R. Rep. 4: pl. 4, f. 9, as Cereus bigelovii zuniensis; Gartenwelt 
42157, as Echinocereus phoeniceus; Monatsschr. Kakteenk. 6:1 51, as Echinocactus phoeniceus 
inermis (through typographical error); N. Mex. Agr. Exp. Sta. Bull. 78: pl. [18]. 
Plate 1, figure 1, shows a flowering plant collected b : . . 
figure 2 shows an open flower. &P ected by E. A. Goldman in Anzona; 
. 16. Echinocereus rosei Wooton and Standley, Contr. U. S. Nat. Herb. 19: 457. 1915. 
coment forming small compact clumps, the stems 1 to 2 dm. long, 5 to 8 cm. in diameter, 
many as 40; ribs 8 to 11, obtuse; areoles rather closely set; spines pinkish to brownish 
inner perianthceemets broall obtue: centrals 4, 4 to 6 cm. long; flowers 4 to 6 cm. long, scarlet; 
: : . ad, obtuse; s i _ -~ , ° 
intermixed with short hairs: fruit spiny, pines on ovary and flower-tube brownish or yellowish, 
Type locality: Agricultural College, New Mexico. 
Noe : In mountains and dry hills and sometimes on the mesas of southern 
exico, western Texas, and adjacent parts of northern Mexico. 
