GYMNOCALYCIUM. 



157 



fore, that the yellow-flowered species (G. leeanum), referred here by Schumann, should 

 be excluded. 



Illustrations: Schumann, Gesamtb. Kakteen f. 70; Bluhende Kakteen 3: pi. 164, as 



Echinocactus hyptiacanthus. 



8. Gymnocalycium saglione (Cels). 



Echinocactus saglionis Cels, Portef. Hort. 180. 1847. 



Echinocactus hybogonus Salm-Dyck, Cact. Hort. Dyck. 1849. 167. 1850. 



Echinocactus hybogonus saglionis Labouret, Monogr. Cact. 257. 1853. 



Plants simple, globular, often very large, sometimes 3 dm. in diameter, dull green; ribs 13 to 32 

 according to the size of the plant, low, very broad, sometimes 4 cm. long, separated by wavy inter- 

 vals, divided into large, low, rounded tubercles; areoles 2 to 4 cm. apart, large, felted when young; 

 spines dark brown to black, at first ascending, afterwards more or less curved outward, 8 to 10 on 

 small plants but on old plants often 15 or more, 3 to 4 cm. long; central spines 1 to several; flowers 

 white or slightly tinged with pink, 3.5 cm. long, the tube short and broadly funnelform; inner 

 perianth-segments spatulate, acute ; scales of the ovary nearly orbicular, rounded, with a scarious 

 margin. 



/Qo 





LIB 





Fig. 165. Gymnocalycium saglione. 



Fig. 166. Gymnocalycium gibbosum. 



Type locality: Catamarca, Tucuman, Argentina. 



Distribution: Northern Argentina and perhaps southern Bolivia. 



Our Bolivian reference is based on a living specimen and flowers collected by P. L. 

 Porte at Lagunillas, southeastern Bolivia, July 1920, and delivered to us in good condition 

 March 10, 1921 ; this may or may not belong here; it flowered May 7 and again on June 

 21, 1 92 1. It may be described as follows: 



Ribs 8, obtuse; flower 3 to 3.5 cm. long; flower-tube proper very short, only 1 to 2 mm. long; 

 throat of flower broad, funnelform, 15 mm. long, bearing many stamens; inner surface of throat and 

 tube deep reddish purple; filaments short, purple; style and stigma-lobes purple; inner perianth- 

 segments short-oblong, obtuse, ochre-yellow, but drying pinkish. 



According to Labouret, Echinocactus hybogonus which we refer here as a synonym is 

 a native of Chile, but probably came from Argentina. 



Illustrations: De Laet, Cat. Gen. f. 14, 17; Gartenwelt 7: 279; Bluhende Kakteen 1: 

 pi. 58; Monatsschr. Kakteenk. 12:27; Schumann, Gesamtb. Kakteen Nachtr. f. 30; Schelle, 

 Handb. Kakteenk. f. 125, as Echinocactus saglionis. 



Plate xvii, figure 1, shows a plant brought by Dr. Shafer from near Tapia, Argentina, 

 in 1917 (No. 94), which flowered in the New York Botanical Garden in May 1919. Figure 

 1 65 is from a photograph of an Argentine specimen contributed by Dr. Spegazzini. 



