38 



THE CACTACEAE. 



14; centrals 4 to 6, nearly porreet; flowers large, 8 em. long, reddish purple; areoles on the ovary 

 bearing clusters of reddish spines; stigma-lobes numerous; perianth-segments narrowly obovate, 

 obtuse or obtusish. 



Collected near Tuna Springs, Texas, in 1909, by F. E. Lloyd, for whom it is named. 



Plate iv, figure 4, shows the top of one of the type plants in flower at the New York 

 Botanical Garden. Figure 46 is from a photograph of one of the type plants taken in 

 Washington. 



52. Echinocereus engelmannii (Parry) Riimpler in Forster, Handb. Cact. ed. 2. 805. 1885. 



Cereus engelmannii Parry in Engelmann, Amer. Jour. Sci. II. 14: 338. 1852. 

 Cereus engelmannii variegalus Engelmann and Bigelow, Proc. Amer. Acad. 3: 283. 1856. 

 Cereus engelmannii chrysocenlrus Engelmann and Bigelow, Proc. Amer. Acad. 3: 283. 1856. 

 Echinocereus engelmannii chrysocentrus Riimpler in Forster, Handb. Cact. ed. 2. 806. 1885. 

 Echinocereus engelmannii variegalus Riimpler in Forster, Handb. Cact. ed. 2. 806. 1885. 



Cespitose, forming large clumps; joints erect or ascending, cylindric, 1 to 3 dm. long, 5 to 6 cm. 

 in diameter; ribs n to 14, low, obtuse; areoles large, nearly circular; radial spines about 10, ap- 

 pressed, stiff, about 1 cm. long; central spines 5 or 6, very stout, more or less curved and twisted, 

 terete or somewhat flattened, sometimes 7 cm. long, yellowish to brown, more or less variegated; 

 flowers somewhat variable in size, 5 to 8 cm. long, and even broader when fully expanded, purple ; 

 perianth-segments oblong, 3 to 4 cm. long, acuminate; scales on ovary 3 to 5 mm. long, acuminate; 

 areoles felted and bearing stout bristles; fruit ovoid to oblong, spiny, about 3 cm. long; seeds black, 

 nearly globular, or a little oblique, 1.5 mm. in diameter or less, tuberculate. 



Type locality: Mountains about San 

 Felipe, southern California. 



Distribution: California, Nevada, Utah, 

 Arizona, Sonora, and Lower California. 



The three varieties, albispinus Cels, 

 fulvispinus Cels, and pfersdorffii Heyder, 

 mentioned by Schumann (Gesamtb. Kakteen 

 276. 1898) are simply forms named from 

 color differences in the spines. 



Two other varieties have been mentioned 

 but are unimportant : robustior Hildmann and 

 versicolor (Monatsschr. Kakteenk. 4: 194. 

 1894). 



Some Arizona and Sonora specimens have 

 more slender and lighter-colored spines than 

 is typical, and on these the variety chrysocentrus was based. Additional field observations 

 may show this to be a distinct species; the spines closely resemble those of E. stramineus. 



Illustrations: Journ. N. Y. Bot. Gard. 6: 93, as Echinocereus; Cact. Mex. Bound, pi. 

 57; Gartenflora 33: pi. 1174a, as Cereus engelmannii; Pac. R. Rep. 4: pi. 5, f. 8 to 10, as 

 Cereus engelmannii chrysocentrus; Pac. R. Rep. 4: pi. 5, f. 4 to 7, as Cereus engelmannii 

 variegatus; Cact. Journ. 2: 132, as Echinocactus engelmannii ; Cact. Journ. 1: pi. for Septem- 

 ber; 2: 146; Monatsschr. Kakteenk. 16: 151; Schelle, Handb. Kakteenk. 134. f. 65; Journ. 

 N. Y. Bot. Gard. 6: f. 23; Contr. U. S. Nat. Herb. 16: pi. 8, 9. 



Plate v, figure 1 , shows the top of a plant, which flowered at the New York Botanical 

 Garden, sent by S. B. Parish from southern California in 191 5. 



53. Echinocereus sarissophorus sp. nov. 



Cespitose ; stems short, thick, pale green, about 10 cm. thick ; ribs 9 ; radial spines 7 to 10, slender; 

 centrals several, 5 to 8 cm. long, often bluish, somewhat angled; flowers purplish, 7 to 8 cm. long; 

 inner perianth-segments broad ; areoles on ovary and flower-tube bearing short, white wool and 3 to 5 

 long pale bristle-like spines; fruit globular, 2 to 3 cm. in diameter, covered with clusters of deciduous 

 spines; seeds black. 



Fig. 47. Kchinocereus sarissophorus. 



