ECHINOFOSSUEOCACTUS. 



117 



Echinocactus stenogonus, first mentioned by Schumann (Monatsschr. Kakteenk. 5: 

 107. 1895), who credits the name to Weber, seems to have been only a garden name for 

 Echinocactus crispatus. 



Watson (Cact. Cult. 99) states that "it is apparently closely allied to E. longiha- 

 matus," but this is hardly warranted. 



The specimen figured in the Dictionary of Gardening, referred to below, may belong 

 elsewhere. It is described as having about 20 ribs; radial spines 8 or 9, spreading, setaceous, 

 white with brown tips; central spines 4, reddish and much larger than the radials. The 

 plant came from the collections of F. A. Haage jr., of Erfurt. It may belong to E. 

 heter acanthus. E. crispatus cristatus Giirke (Monatsschr. Kakteenk. 16: 188. 1906) is 

 also different. 



E. flexispinus Salm-Dyck (Cact. Hort. Dyck. 1849. 159. 1850. Not Engelmann, 

 1848) is referred here by Schumann. It is described, however, as follows: 



Globose or obovate, light green; ribs numerous, 30 or 31, strongly compressed, undulate, in- 

 terrupted; areoles remote, when young bearing yellow wool; 3 upper spines recurved, ascending, 

 somewhat flattened, a central one porrect and subulate, the 4 lower spines elongated, subulate, but 

 flexible, white when young, pale brown when old; flowers unknown. 



E. undulatus Dietrich (Allg. Gartenz. 12: 187. 1844) is referred here also by Schumann, 

 but Salm-Dyck thought it was unlike his E. flexispinus for the 3 upper spines are large and 

 flat and the 4 lower ones are rigid. 



Illustrations: Mem. Mus. Hist. Nat. Paris 17: pi. 8; (?)Dict. Gard. Nicholson 1: f. 688; 

 Schelle, Handb. Kakteenk. 172. f. 102; Watson, Cact. Cult. 99. f. 3$, as Echinocactus 

 crispatus; Monatsschr. Kakteenk. 16: 189, as Echinocactus crispatus cristatus. 



Figure 123 is copied from the first illustration above cited. 



16. Echinofossulocactus dichroacanthus (Martius). 



Echinocactus dichroacanthus Martius in Pfeiffer, Enum. Cact. 62. 1837. 



Echinocactus dichroacanthus spinosior Monville in Labouret, Monogr. Cact. 213. 1853. 



Plant obovoid, dull green, 15 cm. high, 10 cm. in diameter, somewhat umbilicate at apex; 

 ribs 32, thin, acute, undulate, somewhat wavy; areoles only a few on each rib, white-tomentose ; 

 upper spines 3, erect, flattened, purplish; radial spines 4 to 6, white; flowers and fruit unknown. 



Type locality: Mexico. 

 Distribution: Hidalgo, Mexico. 



Schumann's description differs somewhat from the original, but the only plant he 

 refers to is that of Karwinsky, which is probably the type. 



17. Echinofossulocactus anfractuosus (Martius) Lawrence in Loudon, Gard. Mag. 17:317. 1841. 



Echinocactus anfractuosus Martius in Pfeiffer, Enum. Cact. 63. 1837. 

 Echinocactus anfractuosus spinosior Lemaire, Cact. Gen. Nov. Sp. 89. 1839. 

 Echinocactus anfractuosus orlhogonus Monville in Labouret, Monogr. Cact. 220. 1853. 



Plant simple, somewhat longer than broad, 12.5 cm. long, 6 cm. in diameter, dull green; ribs 

 many (about 30, according to Schumann), compressed, wavy, each bearing only a few areoles; spines 

 somewhat curved, straw-colored with brown tips; radial spines 7, stout, the 3 upper radials much 

 larger, about 3 cm. long, the 4 lower radials slender; central spine solitary, 2.5 cm. long, brownish; 

 perianth-segments purple with white margins. 



Type locality: Mexico. 



Distribution: Mexico, in Hidalgo at Pachuca and Ixmiquilpan. 



18. Echinofossulocactus tricuspidatus (Scheidweiler) . 



Echinocactus tricuspidatus Scheidweiler, Allg. Gartenz. 9: 51. 1841 

 Echinocactus mehnsianus Wegener, Allg. Gartenz. 12: 65. 1844. 

 Echinocactus phyllacanthus tricuspidatus Forster, Handb. Cact. 311. 



1846. 



Globose to short-cylindric, 5 to 8 cm. broad; ribs numerous, 30 to 55, thin, wavy; areoles at 

 first lanate, afterwards naked; spines 5 (Schumann says 9 to 11), the upper one thin, compressed, 



