144 
THE CACTACEAE. 
Plate xiii, figure 2, is from a photograph taken by Dr. MacDougal at El Riego, Tehua- 
can, Mexico, in 1906; plate xvi, figure 3, shows the flowering top of the plant sent by M. 
de Lautreppe, above alluded to. 
27. Ferocactus crassihamatus (Weber). 
Echinocactus crassihamatus Weber, Diet. Hort. Bois 468. 1896. 
Echinocactus mathssoriU 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. 
Fig. 15 i.- —Ferocactus crassihamatus. Fig. 152.—Ferocactus hamatacanthus. 
Type locality: Queretaro. 
Distribution: Queretaro, 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 
detail. 
Illustrations: Bliihende Kakteen 1: pi. 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* Miihlenpfordt, Allg. Gartenz. 14: 371. 1846. 
Echinocactus flexispinus Engelmann in Wislizenus, Mem. Tour North. Mex. in. 1848. 
Echinocactus longihamatus Galeotti in Pfeiffer, Abbild. Beschr. Cact. 2: pi. 16. 1848. 
Echinocactus sinuatus Dietrich, Allg. Gartenz. 19: 345. 1851. 
Echinocactus setispinus sinuatus Poselger, Allg. Gartenz. 21: 119. 1853. 
Echinocactus setispinus robustus Poselger, Allg. Gartenz. 21: 119. 1853. 
Echinocactus setispinus longihamatus Poselger, Allg. Gartenz. 21: 119. 1853. 
Echinocactus longihamatus hamatacanthus Labouret, Monogr. Cact. 201. 1853. 
Echinocactus treculianus Labouret, Monogr. Cact. 202. 1853. 
Echinocactus longihamatus gracilispinus Engelmann, Proc. Amer. Acad. 3: 273. 1856. 
♦Originally spelled thus by Miihlenpfordt. 
