GYMNOCALYCIUM. 
153 
KEY TO SPECIES—continued. 
BB. Ribs with prominent tubercles. 
C. Flowers with a very short tube. 
Spines brown to black. 
Central spines one or more. 
Tubercles without a distinct chin... ..... 0... ccc ee ee ce eee 
Tubercles with a large chin..... 0.0... cc cece ee eee eens 
Central spines wanting......... 2... ccc eee cee ce teeta tee nee 
Spines yellow. 
Ribs 10 to 15..........-0-- 
Ribs 22... 0. cee ccc ce ee ee ee ee eee ee tenes 
CC. Flowers with more or less elongated tube. 
Spines yellow, at least when young, or white. 
Spines 5 to 7, tortuous, up to 6 cm. long 
Spines a little curved, 1 to 4 cm. long. 
Spines 10 to 13. 
Spines slender, not appressed. ......... 0. eee ener ee ee ee eee eee ees 
Spines stout, appressed. .... 2.6... ce cece ee ee eee ee tne eens 
Spines 3, rarely more. ........ 0.0 ese eee ee ee ee eee tte teenies 
Spines brown. 
Central spines present. 
Ribs acute. .... cc ce ec ce ee ee ee eee teen ee nee ete e nen ne eens 
Ribs obtuse 
Central spines none. 
' Spines slender, acicular. 
Plant dark green............. 
Plant reddish or bronze...........-.-- 
Spines stout, subulate. 
Flower-tube as long as limb; flowers sublateral.. . 
Flower-tube much shorter than limb; flowers central. ......-.---++--++ 
AAA. Species not grouped 
ee er 
. saglione 
. mostii 
. gibbosum 
. multiflorum 
. brachyanthum 
AA AAD 
. anisitsit 
. monvillet 
. melanocarpum 
. uruguayense 
megalothelos 
. kurtzianum 
G. damsii 
G. platense 
eee ee . G. schickendantzii 
G. stuckertit 
G. joossensianum 
Fic. 159.—Gymnocalycium mihanovichii. 
1. Gymnocalycium mihanovichii (Fri¢ and Giirke). 
. . - bis Brie ¢ iirke, Monatsschr. 
Echinocactus mihanovichii Fri¢ and Giirke, Mo 
Plant somewhat depressed, 5 cm. in diameter or less, 
areoles small, 12 mm. apart; spines 5 Or 6, spreading, y 
perianth-segments brownish green, inner Pera ova 
tinged with red; scales on the slender flower-tube and ova 
e 
nts green to yellowi 
Fic. 160.—G ymnocal ycium netrelianum. 
Kakteenk. 15: 142. 1905- 
en; ribs 8, prominent, acute, 
bout 3 cm. long; outer 
ish green, sometimes 
grayish gre 
llowish; flowers a 
ry broad. 
