156 



THE CACTACEAE. 



8: 36, 37. 1898), var. roseiflorus Hildmann (Schumann, Gesamtb. Kakteen 414. 1898), and 

 bruennowii and flavispinus (Schelle, Handb. Kakteenk. 189. 1907). 



Echinocactus denudatus paraguayensis, sometimes credited to Mundt and sometimes to 

 Haage jr., has not been formally published, but has been illustrated as follows: Schelle, 

 Handb. Kakteenk. 190. f. 123; Tribune Hort. 4: pi. 140; Gartenwelt 9: 266; De Laet, Cat. 

 Gen. f. 3. This plant has been referred to by Schumann (Monatsschr. Kakteenk. 13: 50, 

 51, 109) as Echinocactus paraguayensis. 



Fig. 163. Gymnocalycium denudatum. 



Fig. 164. Gymnocalycium leeanum. 



Illustrations: Martius, PI. Bras. 4 2 : pi. 50, f. 1; Mollers Deutsche Gart. Zeit. 25: 474. 

 f. 6, No. 3; Bliihende Kakteen 1: pi. 59; Schumann, Gesamtb. Kakteen f. 72; Monatsschr 

 Kakteenk. 3: 158. f. I; 14: 41 ; 29: 141 ; Link and Otto, Icon. PI. Rar. pi. 9; Schelle, Handb 

 Kakteenk. 188. f. 119, as Echinocactus denudatus; De Laet, Cat. Gen. f. 10; Tribune Hort. 

 4: pi. 139, as E. denudatus var.; Schelle, Handb. Kakteenk. 189. f. 120, as E. denudatus 

 bruennowii; Schelle, Handb. Kakteenk. 189. f. 121, as E. denudatus delaetii; Schelle, Handb. 

 Kakteenk. 189. f. 122, as. denudatus heuschkehlii; De Laet, Cat. Gen. f. 18, as Echinocactus 

 denudatus paraguayensis; Garten-Zeitung 4: 479. f. m, as E. denudatus intermedins. 



Figure 163 is copied from the third illustration above cited. 



7. Gymnocalycium hyptiacanthum (Lemaire). 



Echinocactus hyptiacanthus Lemaire, Cact. Gen. Nov. Sp. 21. 1839. 



Cactus hyptiacanthus Lemaire in Steudel, Nom. ed. 2. 1: 246. 1840. 



Echinocactus hyptiacanthus eleutheracanthus Monville in Labourer., Monogr. Cact. 249. 



Echinocactus hyptiacanthus megalotelus Monville in Labourer., Monogr. Cact. 249. 1853. 



Echinocactus hyptiacanthus nitidus Monville in Labouret, Monogr. Cact. 249. 1853. 



853- 



Simple, globose or sometimes depressed, 5 to 7 cm. in diameter, dull green, the apex somewhat 

 umbilieate; ribs 9 to 12, broad, obtuse, somewhat tuberculate; radial spines 5 to 9, spreading or 

 appressed, 10 to 12 mm. long, flexible, sometimes pubescent; central spine solitary or wanting; 

 flowers white, 4.5 to 5 em. long. 



Type locality: Not cited. 



Distribution: Uruguay. 



This plant is sometimes distributed as Echinocactus multiflorus, but it is very different 

 from that species. It was first described from barren plants, but afterwards Labouret 

 described the flowers as white as did also Arechavaleta and Giirke. We believe, there- 



