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: Cérdoba, Argentina. 
Distribution: Province of Cérdoba. 
Illustrations: Blithende Kakteen 2: pl. 93, as Echinocactus mosti1; Addisonia 3: pl. 83, B. 
Plate xvi, figure 2, shows the top of a plant in bloom, brought by Dr. Rose from 
Cassafousth, Cérdoba, Argentina, to the New York Botanical Garden, in 1915; figure 3 
shows a flower. 
10. Gymnocalycium gibbosum (Haworth) Pfeiffer, Abbild. Beschr. Cact. 2: under pl. 1. 1845. 
Cactus gibbosus Haworth, Syn. Pl. Succ. 173. 1812. 
Cactus nobilis Haworth, Syn. Pl. Succ. 174. 1812. Not Linnaeus, 1767. 
Cactus reductus Link, Enum. 2: 21. 1822. 
Echinocactus gibbosus De Candolle, Prodr. 3: 461. 1828. 
Cereus reductus De Candolle, Prodr. 3: 463. 1828. 
Echinocactus nobilis Haworth, Phil. Mag. 7: 115. 1830. 
‘> Cereus gibbosus Pfeiffer, Enum. Cact. 74. 1837. 
Echinocactus mackieanus Hooker in Curtis’s Bot. Mag. 64: pl. 3561. 1837. 
Echinocactus gibbosus nobilis Monville in Lemaire, Cact. Gen. Nov. Sp. 91. 1839. 
Gymnocalycium reductum Pfeiffer, Abbild. Beschr. Cact. 2: pl. 12. 1847. 
“chinocactus reductus Schumann, Monatsschr. Kakteenk. 5: 107. 1895. 
Echinocactus gibbosus chubutensis Spegazzini, Anal. Mus. Nac. Buenos Aires II. 4: 285. 1902. 
Echinocactus gibbosus 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 gibbosus typicus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 42503. 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 (Foérster, Handb. Cact. ed. 2. 583. 1885), cerebriformis 
Spegazzini (Anal. Soc. Cient. Argentina 48: 50. 1899), fennellii F. A. Haage jr. (Monats- 
schr. Kakteenk. 9:115. 1899; Echinocactus fennellii F. A. Haage jr. in Schumann, Gesamtb. 
Kakteen 409. 1898), ferox 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 Rimpler (Férster, Handb. Cact. ed. 2. 584. 1885; Echinocactus 
schlumbergert 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 1s a variety of this species. Echinocactus globosus cristatus is only 
a gardeneér’s name for a monstrosity. Echinopsis gibbosa Pfeiffer (Forster, Handb. Cact. 
291. 1846) was given as a synonym of this species. 
I Hustrations: Blihende Kakteen 1: pl. 55; Schumann, Gesamtb. Kakteen f. 71; 
Lemaire, Icon. Cact. pl. 13 (2); 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: 
