OPUNTIA. 63 



25. Opuntia Uoydii Rose, Contr. U. S. Nat. Herb. 12: 292. 1909. 



Much branched, 2 to 3 meters high and nearly as broad; joints terete, 2 cm. in diameter; 

 tubercles prominent, oblong; spines few, on last year's joints 3, reddish, 1.5 cm. long; leaves terete, 

 6 to 8 mm. long; flowers 3 cm. long, opening after midday; petals 15 mm. long, dull purple; fila- 

 ments olive-green below purplish above ; style rose-colored; stigma-lobes white; ovary yellowish, 

 strongly tuberculate, naked; fruit 3 cm. long, yellow to orange, slightly tuberculate. 



Type locality: On foot slopes. Hacienda de Cedros, Zacatecas, Mexico. 



Distribution: Central Mexico. 



According to F. E. Lloyd, for whom this species was named, it is known to the Mexi- 

 cans as tasajo macho. 



We have had this plant in cultivation for several years, but it does not grow well 

 under glass; these specimens have white areoles; no glochids are developed the first 



Fig. 77. — Opuntia lloydii. 



Fig. 78. — Opuntia lloydii. Photograph by F. E. Lloyd. 



year, but on old branches dark-brown bunches of glochids are developed in the upper 

 edges of the areoles, and the several brownish spines are acicular. 



Illustration: Contr. U. S. Nat. Herb. 12: f. 34; pi. 25. 



Figure 77 represents two joints of the type specimen; figure 78 is from a photograph 

 of the type plant. 



26. Opuntia imbricata (Haworth) De Candolle, Prodr. 3: 471. 1828. 



Cereus imbricatus Haworth, Rev. PI. Succ. 70. 1821. 



Cactus .cylindricus 'ia.mes, Q2Lt. i?i2. 1825. Not Lamarck. 1783. 



Cactus bleo Torrey, Ann. Lye. N. Y. 2 : 202. 1828. Not Humboldt, Bonpland, and Kunth. 1823. 



Opuntia rosea De Candolle, Prodr. 3: 471. 1828. 



Opuntia decipiens De Candolle, Mem. Mus. Hist. Nat. Paris 17: 118. 1828. 



Opuntia exuviata De Candolle, Mem. Mus. Hist. Nat. Paris 17: 118. 182S. 



Opuntia exuviata angustior De Candolle, Mem. Mus. Hist. Nat. Paris 17: 118. 1828. 



Opuntia exuviata spinosior De Candolle, Mem. Mus. Hist. Nat. Paris 17: 118. 1828. 



Opuntia exuviata stellata Lemaire, Cact. Gen. Nov. Sp. 67. 1839. 



Opuntia exuviata viridior Salm-Dyck, Cact. Hort. Di'ck..i844. 48. 1845. 



Opuntia arborescens Engelmann in Wislizenus, Mem. Tour North. Mex. 90. 1848. 



Opuntia imbricata crassior Salm-Dyck, Cact. Hort. Dyck. 1849. 249. 1850. 



