GYMNOCALYCIUM. 
163 
18. Gymnocalycium kurtzianum (Giirke). 
Echinocactus kurtzianus Giirke, Monatsschr. Kakteenk. 16: 55. 1906. 
Simple, globose but depressed, 10 to 15 cm. in diameter, naked at apex; ribs 10 to 18, divided 
into tubercles; radial spines 8, spreading, brownish, with recurved tips, 2.5 to 4 cm. long; central 
spine solitary, 3 cm. long; flowers large, white, reddish at base; scales on ovary large; inner perianth- 
segments obtuse. 
Type locality: Probably Cordoba, Argentina. 
Distribution: Argentina. 
The plant is known to us only from descriptions and illustrations. 
This species was named for Dr. Fritz Kurtz (1854-1920) who lived for many years in 
Argentina. 
Illustrations: Monatsschr. Kakteenk. 17; 126; Bliihende Kakteen 2: pi. 97, as Echino¬ 
cactus kurtzianus. 
Figure 174 is copied from the second illustra¬ 
tion above cited. 
19. Gymnocalycium damsii (Schumann). 
Echinocactus denudatus bruennowianus Haage jr., 
Monatsschr. Kakteenk. 8: 37. 1898. 
Echinocactus damsii Schumann, Gesamtb. Kakteen 
Nachtr. 119. 1903. 
Simple, globular or somewhat depressed; ribs 10, 
green, tuberculate; spines all radial, straight, short, the 
longest 12 mm. long; flowers narrow, funnelform, 6 cm. 
long; inner perianth-segments oblong, white to light 
pinkish, spreading; scales on the ovary and flower-tube 
small, scattered; fruit oblong, 2.5 cm. long, 6 mm. in 
diameter, red. 
Type locality: Northern part of Paraguay. 
Distribution: Paraguay. 
The plant is known to us only from descrip¬ 
tions and illustrations. 
Illustrations: Bliihende Kakteen 2: pi. 83; 
Schumann, Gesamtb. Kakteen Nachtr. f. 27; 
Monatsschr. Kakteenk. 14: 76, as Echinocactus damsii; Cact. Journ. 1: 53, as Echinocactus 
denudatus brunnowianus. 
Figure 175 is copied from the first illustration above cited. 
20. Gymnocalycium platense (Spegazzini). 
Echinocactus platensis Spegazzini, Contr. FI. Vent. 28. 1896. 
Echinocactus quehlianus F. Haage jr. in Quehl, Monatsschr. Kakteenk. 9: 43. 1899. 
Echinocactus stenocarpus Schumann, Monatsschr. Kakteenk. 10: 181. 1900. 
Echinocactus gibbosus platensis Spegazzini, Anal. Mus. Nac. Buenos Aires III. 2: 8. 1902. 
Echinocactus platensis typicus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 504. 1905. 
Echinocactus platensis leptanthus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 504. 1905. 
Echinocactus platensis quehlianus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 504. 1905. 
Echinocactus platensis parvulus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 505. 1905. 
Echinocactus stellatus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 505. 1905. Not Scheidweiler, 
1840. 
Echinocactus baldianus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 505. 1905. 
Plants small, depressed, half-hidden in the earth, 4 to 9 cm. broad, dull bluish green or purple or 
bronzed; ribs 8 to 12, broad and low, divided by cross lines into tubercles; tubercles with a hori¬ 
zontal or ascending chin-like projection; areoles when young white-felted; spines 3 to 6, 1 cm. long or 
less, brown with white tips, acicular, more or less appressed; flower inodorous, 6 cm. long, dull 
bluish green; tube and ovary bearing a few 7 broad, short, rounded scales, these more or less purplish 
on the edge; outer perianth-segments white with a broad green stripe down the center; inner perianth- 
segments pure white; throat broad, purple within; filaments numerous, scattered over the throat: 
style short and thick, 2 cm. long; stigma-lobes cream-colored; ovary oblong. 
