ECHINOCEREUS. 



29 



36. Echinocereus weinbergii Weingart, Monatsschr. Kakteenk. 22:83. 1912. 



Very stout, usually simple, at first globose, becoming conical, at least in cultivation, 13 cm. in 

 diameter; ribs 15, acute, more or less undulate; areoles elliptic, approximate; radial spines 9 to 12, 

 pectinate, 3 to 12 mm. long, at first white or rose but in age yellowish; central spines none; flowers 

 diurnal, 3.6 cm. broad, rose-colored; inner perianth-segments in several series, 1.5 to 3 cm. long, 

 4 to 5 mm. broad, lanceolate, acuminate; fruit not known. 



Figs. 30 and 31. Echinocereus rigidissimus. 



Type locality: Not cited. 



Distribution: Doubtless Mexico, but known only from 

 garden plants. 



This is one of the stoutest plants of the genus known 

 to us. It was named in honor of Frank Weinberg, a cactus 

 dealer. 



Illustration: Monatsschr. Kakteenk. 24: 105. 



Figure 32 is from a photograph contributed by Mr. 

 Frank Weinberg. 



37. Echinocereus pectinatus (Scheidweiler) Engelmann in Wisli- 

 zenus, Mem. Tour North. Mex. 109. 1848. 



Echinocactus pectinatus Scheidweiler, Bull. Acad. Sci. Brux. 5: 



492. 1838. 

 Echinocactus pectiniferus Lemairc, Cact. Gen. Nov. Sp. 25. 1839. 

 Echinocactus pectiniferus laevior Monville in Lemaire, Cact. 



Gen. Nov. Sp. 26. 1839. 

 Echinopsis pectinata Fennel, Allg. Gartenz. 11: 282. 1843. 

 Cereus pectinatus Engelmann in Gray, PI. Fendl. 50. 1849. 

 Cereus pectiniferus Labouret, Monogr. Cact. 320. 1853. 

 Echinocereus pectinatus chrysacanthus Schumann, Gesamtb. Kakteen 272. 189S. 



Plants simple, erect, cylindric, 1 to 1.5 dm. long, 3 to 6 cm. in diameter, almost hidden by the 

 many short interlocking spines; ribs 20 to 22, usually straight; areoles approximate but not touching 

 one another, elliptic, 3 mm. long; radial spines about 30, pectinate, usually much less than 10 mm. 

 long, white or rose-colored, the colors more or less in bands about the plant; central spines several, 

 more or less porrect; flowers purplish, 6 to 8 cm. long; areoles on ovary and flower-tube felted, very 

 spiny; fruit spiny, becoming naked, 2 to 3 cm. in diameter. 



Type locality: Near Villa del Pennasco, central Mexico. 



Distribution: Central Mexico. 



This species was first collected by Galeotti who sent a collection to Belgium from the 

 states of San Luis Potosi and Guanajuato, Mexico. The type station, Villa del Pennasco, 

 we have not located. It was soon after figured by Lemaire (Icon. Cact. pi. 14 or 15) and 



Fig. 32. Echinocereus weinbergii. 



