144 THE CACTACEAE. 
Plate x11, figure 2, is from a photograph taken by Dr. MacDougal at El Riego, Tehua- 
cin, Mexico, in 1906; plate xvi, figure 3, shows the flowering top of the plant sent by M. 
de Lautreppe, above alluded to. 
D 27. Ferocactus crassihamatus (Weber). 
Echinocactus crassihamatus Weber, Dict. Hort. Bois 468. 1896. 
7 Echinocactus mathssonii Berge, Monatsschr. Kakteenk. 7: 76. 1897. 
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, 
usually red, the stoutest one porrect and hooked; flowers small, about 2 cm. long, purple; inner 
perianth-segments linear-oblong, acute. 
Fic. 151.—Ferocactus crassihamatus. Fic. 152.—Ferocactus hamatacanthus. 
Type locality: Querétaro. 
Distribution: Querétaro, Mexico. 
We know this plant only from descriptions and illustrations; its size is not recorded. 
The original place of publication of Echinocactus mathssonii, as given by Schumann 
(Monatsschr. Kakteenk. 3: 45. 1893), is without description and must be rejected. In 
the place we cite above there is only a phrase of description, but he later described it in 
Illustrations: Blithende Kakteen 1: pl. 8; Schumann, Gesamtb. Kakteen f. 61, as 
Echinocactus mathssonii. 
| Figure 151 is copied from the first illustration above cited. 
= 28. Ferocactus hamatacanthus (Miihlenpfordt). 
Echinocactus hamatocanthus* Mihlenpfordt, Allg. Gart : 
Echinocactus flexispinus Engelmann in Wislizenus, Mem. Tour North, ven TII. 1848 
7 Echinocactus longihamatus Galeotti in Pfeiffer, Abbild. Beschr. Cact 2: 1.16. 18 3. 
>Echinocactus sinuatus Dietrich, Allg. Gartenz. 19: 345. 1851 * apes 
Echinocactus selispinus sinuatus Poselger, Allg. Gartenz 21: 11 18 
Echinocactus setispinus robustus Poselger, Allg. Gartenz. 21: Ie, 1803, 
Echinocactus setispinus longihamatus Poselger, Allg. Gartenz at: II 358 
Echinocactus longihamatus hamatacanthus Labouret Monogr. Cact 20 18: 
Echinocactus treculianus Labouret, Monogr. Cact. 202 1853 ROR SS: 
Echinocactus longihamatus gracilis pinus Engelmann, Proc. Amer. Acad. 3: 273. 1856 
*Originally spelled thus by Miihlenpfordt. 
