EUPHORBIACEZ. 99 
74. Huphorbia preslii, Guss. Fl, Sic. Prodr. i. p. 539; DC. Prodr. xv. 2, p. 23. 
CanaDa to Trexas.—NortH Mexico, region of San Luis Potosi, 6000 to 8000 feet 
(Parry & Palmer, 814), Chihuahua (Potts) ; Soura Mexico, Orizaba (Botteri, 590, 591), 
valley of Mexico (Bourgeau, 185), Zacatecas (Hartweg).—Ecuapor. Hb. Kew. 
8. glaberrima, Boiss. in DC. Prodr. xv. 2, p. 23. 
SourH Mexico, near Jalapa, and on the Rio Blanco (Karwinski). 
This species occurs as an introduced plant in Sicily and elsewhere in the Old World. 
75. Kuphorbia prostrata, Ait. Hort. Kew. ii. p. 139; DC. Prodr. xv. 2, p. 47; 
Boiss. Ic. Euphorb. t. 17. 
Euphorbia callitrichoides et E. tenella, H. B. K. Nov. Gen, et Sp. ii. pp. 52, 58. 
Euphorbia trichogona, Bertol. Misc. Bot. iii. p. 20, t. 6. fig. 3. 
Euphorbia perforata, Guss. Fl. Sic. Prodr. i. p. 540. 
Lovistana to Texas.—NortH Mexico, region of San Luis Potosi, 6000 to 8000 feet 
(Parry & Palmer, 818); Sours Mexico, Jalapa (Coulter, 1446), without locality 
(Karwinski); Guatemata (Bernoulli)—And widely dispersed in Sourh AMERICA and 
the West InpiEs; also in Tropical Arrica, BourBon and Mauritius. Hb. Kew. 
Naturalized in Sicily and elsewhere. 
76. Kuphorbia pulcherrima, Willd., ex Boiss. in DC. Prodr. xv. 2, p. 71. 
Euphorbia erythrophylla, Bertol. Fl. Guat. p.19, t.6. 
Poinsettia pulcherrima, Grah. Edinb. Phil. Journ. 1836; Bot. Mag. t. 3493. 
Norta Mexico, Sierra Madre (Seemann); Sour Muxico, Papantla (Schiede), valley 
of Cordova (Bourgeau, 1674); Guatemata (Friedrichsthal); Costa Rica (¢Grsted). 
Hb. Kew. 
77. Euphorbia pycnanthema, Engelm. in Torr. Bot. U.S. & Mex. Bound. 
Surv. p. 188; DC. Prodr. xv. 2, p. 22. 
Nortu Mexico, Lake Santa Maria, Chihuahua (Wright). “Ab. Kew. 
78. Euphorbia radians, Benth. Pl. Hartw. pp. 8 et 20; DC. Prodr. xv. 2, p. 74. 
Poinsettia radians, K\. et Garcke, Tricocce. p. 104. 
SoutH Mexico, Guanajuato (Hartweg), Oaxaca (Galeotti, 3750). - Hb. Kew. 
79. Euphorbia radioloides, Boiss. in DC. Prodr. xv. 2, p. 45. 
Nortu Mexico, Cerro de Pinal (Seemann, 1522). Hb. Kew. | 
80. Euphorbia restiacea, Benth. Bot. Voy. ‘Sulphur,’ p. 162; DC. Prodr. xv. 
2, p. 74. 
South Mexico, between San Blas and Tepic (Sinclair). Hb. Kew. 
81. Euphorbia revoluta, Engelm. in Torr. Bot. U.S. & Mex. Bound. Surv. 
p. 186; DC. Prodr. xv. 2, p. 46; Boiss. Ic. Euphorb. t. 13. 
New Mexico.—Nortu Mexico, valley of the Rio Grande (Wright). Hb. Kew. 
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