948 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Echinocactus curvicornis Miquel, Linnaea 12: 5. 1838. 



Echinocactus stellatus Scheidw. Allg. Gartenz. 8: 338. 1840. 



Echinocactus solenacanthus Scheidw. Allg. Gartenz. 9: 50. 1841. 



Eastern Mexico. 



Globular ; ribs 15 ; radial spines straight, widely spreading ; central spine 

 solitary, erect, 7 cm. long, broad and flat, recurved at tip, brownish red ; 

 flowers 2.5 to 4 cm. long ; perianth segments narrow, acute, red with white 

 margins ; ovary covered with ovate imbricate scales ; fruit short, oblong, 2 cm. 

 long, 12 mm. in diameter. 



25. Ferocactus latispinus (Haw.) Britt. & Rose, Cactaceae 3: 143. 1922. 

 Cactus latispinus Haw. Phil. Mag. 63: 41. 1824. 



Echinocactiis cornigerns DC. MSm. Mus. Hist. Nat. 17: 36. 1828. 



Echinocactus latispinus Hemsl. Biol. Centr. Amer. Bot. 1: 533. 1880. 



Widely distributed in Mexico. 



Plant simple, globular or somewhat depressed, 25 to 40 cm. high, 40 cm. 

 in diameter; ribs 15 to 23, but usually 21, prominent; areoles large; radial 

 spines 6 to 10, slender, annulate, white to rose, 2 to 2.5 cm. long ; central 

 spines 4 or more, stouter and more highly colored than the radials, all straight 

 except one, this much flattened and hooked ; flowers campanulate, 2.5 to 8.5 

 cm. long, rose to purple ; perianth segments narrowly oblong, acute ; scales on 

 ovary closely imbricate, thin and papery, ovate, with thin ciliate margins ; 

 scales on flower tube similar to those on ovary but more elongate ; fruit 

 elongate, 4 cm. long; seeds described as reniform, slightly pitted, 1.5 mm. long. 

 " Biznaga de chilitos " (Durango, Oaxaca) ; " biznaga ganchuda " (Zacatecas, 

 Patoni ) . 



26. Ferocactus crassiham^atus (Weber) Britt. & Rose, Cactaceae 3: 144. 1922. 

 Echinocactus crassihamatus Weber, Diet. Hort. Bois 468. 1896. 

 Echinocactxis mathssonii Berger, Monatsschr. Kakteenk. 7: 76. 1897. 

 Quer^taro. 



Simple, globose to short-cylindric, pale green, somewhat glaucous; ribs 13, 

 rather prominent, obtuse, strongly undulate ; areoles large, only a few on 

 each rib; radial spines 8, spreading, the upper ones straight, 2 or 3 of the 

 lower ones hooked ; central spines 5, longer and stouter than the radials, usu- 

 ally red, the stoutest one porrect and hooked ; flowers about 2 cm. long, purple ; 

 inner perianth segments linear-oblong, acute. 



27. Ferocactus hamatacanthus (Miihlenpf.) Britt. & Rose, Cactaceae 3: 144, 

 1922. 



Echinocactus hamatacanthus Miihlenpf. Allg. Gartenz. 14: 371. 1846. 



Echinocactus flexispinus Engelm. in Wisliz. Mem. North. Mex. 111. 1848. 



Echinocactus longihamatus Galeotti ; Pfeiff. Abbild. Beschr. Cact. 2: pi. 16. 

 1848. 



Echinocactus sinuatus Dietr. Allg. Gartenz. 19: 345. 1851. 



Echinocactus treculianus Labour. Monogr. Cact. 202. 1853. 



Echinocactus flavispinns Meinsh. Wochenschr. Giirtn. Pflanz. 1: 28. 1858. 



Echinocactus haematochroanthus Hemsl. Biol. Centr. Amer. Bot. 1: 532. 

 1880. 



Northern Mexico. Texas and New Mexico. 



Solitary, globular to oblong, up to 60 cm. high ; ribs usually 13, sometimes 

 17, strongly tubercled, 2 to 3 cm. high ; areoles large, 1 to 3 cm. apart ; radial 

 spines about 12, acicular, terete, 5 to 7 cm. long; central spines 4, elongate, 

 angled, sometimes 15 cm. long, one of them hooked at apex ; flowers 7 to 8 

 cm. long, yellow, in some forms said to be scarlet within ; fruit oblong, 2 to 



