GYMNOCALYCIUM. 155 
Illustrations: Monatsschr. Kakteenk. 21: 133; Bliihende Kakteen 3: pl. 144, as 
Echinocactus guerkeanus. 
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 cm. high, 14 cm. 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 Vifia, 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. Spegazzini. 
Fic. 161.—G. guerkeanum. Fic. 162.—G. spegazzinii. 
_> 6. Gymnocalycium denudatum (Link and Otto) Pfeiffer, Abbild. Beschr. Cact. 2: under pl. 1. 1845. 
> Echinocactus denudatus Link and cue Icon. ae 17. 1828. 
Cereus denudatus Pfeiffer, Enum. Cact. 73. 1937. 2. 
Echinocactus denudatus typicus Schumann 1n Martius, Fl. Bras. 47: 248. 1890. 
Simple, subglobose or somewhat depressed, 5 to 15 cm in diameter nibs x tos, very broad ane 
low, obtuse, hardly tubercled; spines usually only 5, sometimes 8, a ohio PP ute: ovar and 
sometimes curved; flowers white or pale rose-colored; perianth-segments oblong, acu'' y 
flower-tube bearing only an occasional acute scale. 
Type locality: Southern Brazil. ; 
Distribution: Southern part of Brazil and reported from Argentina and Uruguay. 
Echinocactus intermedius (Monatsschr. Kakteenk. 8: 36. 1898) is, sre da ur 
Schumann, a hybrid between this species and Echinocactus multifiorus, ile - 7 i 
(Garten-Zeitung 4: 479. f. 411. 1885) states that it is a cross between is sper a ere 
monvillei. Numerous varieties have been described, some belonging ot ‘tes rving of a 
have been referred to other species, and some are doubtless mere forms not een " a See 
name. The following we do not know and they are therefore T° t under Ne ie 
var. octogonus Schumann (Martius, Fl. Bras. 4°: 248. 1890 oes voeuschik slianus, metkle- 
schr. Kakteenk. 7: 187. 1897), vars. wieditzianus, andersohnian ts, ese hat Kakteenk 
johnianus, delaetianus, wagnertanus, scheidelianus (F. Haage jr., Mon . 
