158 THE CACTACEAE. 



9. Gymnocalycium mostii (Giirke) Britton and Rose, Addisonia 3: 5. 1918. 



Echinocactus mostii Giirke, Monatsschr. Kakteenk. 16: 11. 1906. 



Plant depressed-globose, 6 to 7 cm. high, 13 cm. in diameter, dark green; ribs 11 to 14, broad and 

 obtuse, more or less tubercled, often strongly; spines subulate, brownish; radial spines 7 to 9, unequal, 

 6 to 22 mm. long; central spine solitary, 18 to 20 mm. long; flower campanulate, pale red, 6 to 8 cm. 

 broad; perianth-segments spreading, oblong; scales on the ovary 8 to 10, broad. 



Type locality: Cordoba, Argentina. 



Distribution: Province of Cordoba. 



Illustrations: Bluhende Kakteen 2 : pi. 93, as Echinocactus mostii; Addisonia 3 : pi. 83, B. 



Plate xvii, figure 2, shows the top of a plant in bloom, brought by Dr. Rose from 

 Cassafousth, Cordoba, Argentina, to the New York Botanical Garden, in 1915; figure 3 

 shows a flower. 



10. Gymnocalycium gibbosum (Haworth) Pfeiffer, Abbild. Beschr. Cact. 2: under pi. 1. 1845. 



Cactus gibbosits Haworth, Syn. P!. Succ. 173. 1812. 



Cactus nobilis Haworth, Syn. PI. Succ. 174. 1812. Not Linnaeus, 1767. 



Cactus reductus Link, Emim. 2: 21. 1822. 



Echinocactus gibbosits De Candolle, Prodr. 3: 461. 1828. 



Cereus reductus De Candolle, Prodr. 3: 463. 1828. 



Echinocactus nobilis Haworth, Phil. Mag. 7: 115. 1830. 



Cereus gibbosits Pfeiffer, Enum. Cact. 74. 1837. 



Echinocactus mackieanus Hooker in Curtis's Bot. Mag. 64: pi. 3561. 1837. 



Echinocactus gibbosits nobilis Monville in Lcmaire, Cact. Gen. Nov. Sp. 91. 1839. 



Gymnocalycium reductum Pfeiffer, Abbild. Beschr. Cact. 2: pi. 12. 1847. 



Echinocactus reductus Schumann, Monatsschr. Kakteenk. 5: 107. 1895. 



Echinocactus gibbosits chubutensis Spegazzini, Anal. Mus. Nac. Buenos Aires II. 4: 285. 1902. 



Echinocactus gibbosits ventanicola Spegazzini, Anal. Mus. Nac. Buenos Aires III. 2: 7. 1903. 



Echinocactus spegazzinii Weber in Spegazzini, Anal. Mus. Nac. Buenos Aires III. 2: 7. 1903. 



Echinocactus gibbosits typicus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 503. 1905. 



Plants simple, sometimes depressed, but usually taller than thick, sometimes 20 cm. high; ribs 

 12 to 14, broad, strongly tubercled; spines 7 to 12, all radial, straight or somewhat curved, usually 

 light brown; flowers white to pinkish, 6 to 6.5 cm. long; inner perianth-segments oblong; ovary-scales 

 ovate, acutish. 



Type locality: Not cited. 



Distribution: Argentina. 



Numerous varieties have been described under this species, among which are the 

 following: celsianus Labouret (Forster, Handb. Cact. ed. 2. 583. 1885), cerebriformis 

 Spegazzini (Anal. Soc. Cient. Argentina 48: 50. 1899), jennellii F. A. Haage jr. (Monats- 

 schr. Kakteenk. 9: 115. 1899; Echinocactus fenncllii'B. A. Haage jr. in vSchumann, Gesamtb. 

 Kakteen 409. 1898), jerox Labouret (Forster, Handb. Cact. ed. 2. 583. 1885; Echinocactus 

 ferox, Monatsschr. Kakteenk. 4: 193. 1894), leonensis Hildmann (and Echinocactus leonensis 

 Cels in Schumann, Gesamtb. Kakteen 409. 1898), leucacanthus Riimpler (Forster, Handb. 

 Cact. ed. 2. 583. 1885), leucodictyus Salm-Dyck (Cact. Hort. Dyck. 1849. 34. 1850; 

 Echinocactus leucodictyus Salm-Dyck, Cact. Hort. Dyck. 1849. 34. 1850), pluricostatus 

 (Forster, Handb. Cact. ed. 2. 584. 1885), polygonus Schumann (Gesamtb. Kakteen 409. 

 1898), and schlumbergeri Riimpler (Forster, Handb. Cact. ed. 2. 584. 1885; Echinocactus 

 schlumbergeri Cels in Schumann, Gesamtb. Kakteen 409. 1898). 



Echinocactus towensis Cels (Schumann, Gesamtb. Kakteen 409) which comes from Towa, 

 an island off the coast of Argentina, we do not know. It may be of this relationship. 



Schumann (Gesamtb. Kakteen 409. 1898) uses the binomial Echinocactus celsianus 

 Labouret, but says it is a variety of this species. Echinocactus globosus cristatus is only 

 a gardener's name for a monstrosity. Echinopsis gibbosa Pfeiffer (Forster, Handb. Cact. 

 291. 1846) was given as a synonym of this species. 



Illustrations: Bluhende Kakteen 1: pi. 55; Schumann, Gesamtb. Kakteen f. 71; 

 Lemaire, Icon. Cact. pi. 13 (?) ; Gartenwelt 15: 536; Mollers Deutsche Gart. Zeit. 25: 474. f. 

 6, No. 28; Monatsschr. Kakteenk. 26: 21, as Echinocactus gibbosus; Edwards's Bot. Reg. 2: 



