GYMNOCALYCIUM. 



155 



Illustrations: Monatsschr. Kakteenk. 21: 133; Bliihende Kakteen 3: pi. 144, as 

 Echinocactus guerkcanus. 



Figure 161 is copied from the last illustration above cited. 



5. Gymnocalycium spegazzinii nom. nov. 



Echinocactus loricatus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 502. 1905. Not Poselger, 1853. 



Depressed, globular, 6 em. high, 14 em. in diameter, grayish green; ribs 13, broad and low, 

 rounded on the margin; areoles elliptic; spines usually 7, subulate, rigid, appressed to the ribs, 

 sometimes recurved, grayish brown, 2 to 2.5 cm. long; flowers 7 cm. long; inner perianth-segments 

 more or less rose-tinted; filaments and style violaceous; stigma-lobes 16, white to rose-colored; 

 scales on the ovary few, broad. 



Type locality: La Vina, province of Salta, Argentina. 

 Distribution: Known only from the type locality. 



As this plant requires a new name it gives us great pleasure to dedicate it to such 

 an enthusiastic cactus student as Dr. Carlos Spegazzini of La Plata, Argentina. 



Figure 162 is from a photograph of the type specimen, contributed by Dr^Sriegazzini. 



Fig. 161. G. guerkeanum. 



Fig. 



-G. spegazzinii. 



6. Gymnocalycium denudatum (Link and Otto) Pfeiffer, Abbild. Beschr. Cact. 2: under pi. 1. 1845. 



Echinocactus denudatus Link and Otto, Icon. PI. Rar. 17. 1828. 



Cereus denudatus Pfeiffer, Enum. Cact. 73. 1837. 



Echinocactus denudatus typicus Schumann in Martius, Fl. Bras. 4 2 : 248. 1890. 



Simple, subglobose or somewhat depressed, 5 to 15 cm. in diameter; ribs 5 to 8, very broad and 

 low, obtuse, hardly tubercled; spines usually only 5, sometimes 8, all radial, appressed, slender, 

 sometimes curved; flowers white or pale rose-colored; perianth-segments oblong, acute; ovary and 

 flower-tube bearing only an occasional acute scale. 



Type locality: Southern Brazil. 



Distribution: Southern part of Brazil and reported from Argentina and Uruguay. 



Echinocactus intermedins (Monatsschr. Kakteenk. 8: 36. 1898) is, according to Dr. 

 Schumann, a hybrid between this species and Echinocactus multiflorus, while Hildmann 

 (Garten-Zeitung 4: 479. f. in. 1885) states that it is a cross between this species and E. 

 monvillei. Numerous varieties have been described, some belonging here, while others 

 have been referred to other species, and some are doubtless mere forms not deserving of a 

 name. The following we do not know and they are therefore left under this species: 

 var. octogonus Schumann (Martius, Fl. Bras. 4 2 : 248. 1890), var. golzianus Mundt (Monats- 

 schr. Kakteenk. 7: 187. 1897), vars. wieditzianus, andersohnianus, heuschkelianus, meikle- 

 johnianus, delaetianus, wagnerianus, scheidelianus (F. Haage jr., Monatsschr. Kakteenk. 



