GYMNOCALYCIUM. 



163 



18. Gymnocalycium kurtzianum (Giirke). 



Echinocactus kurtzianus Giirke, Monatsschr. Kakteenk. 16: 55. 1906. 



vSimple, globose but depressed, 10 to 15 em. 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; Bluhende 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: Bluhende Kakteen 2: pi. 83; 

 vSchumann, Gesamtb. Kakteen Nachtr. f. 27; 

 Monatsschr. Kakteenk. 14: 76, as Echinocactus damsii; Cact. Journ. 1: 53, as Echinocactus 

 denudatus brunnoivianus. 



Figure 175 is copied from the first illustration above cited. 



20. Gymnocalycium platense (Spegazzini). 



Echinocactus platensis Spegazzini, Contr. Fl. 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 parvidta 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 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. 



Fig. 175. Gymnocalycium damsii. 



