64 THE CACTACEAE. 
_ 6. Echinopsis multiplex (Pfeiffer) Zuccarini in Pfeiffer and Otto, Abbild. Beschr.Cact. 1: pl.4. 1839. 
Cereus multiplex Pfeiffer, Enum. Cact. 70. 1837. 
Echinonyctanthus multiplex Lemaire, Cact. Gen. Nov. Sp. 85. 1839. 
Plants simple or very proliferous, globular to somewhat clavate, rounded at apex, 1.5 dm. high; 
ribs 13 to 15, broad at base, acute, slightly undulate; areoles large, filled with short white wool; 
spines brown, subulate; radial spines 5 to 15, ascending, 2 cm. long; central spines 2 to 5, 4 cm. long; 
flower 15 to 20 cm. long, its tube distinctly enlarged above, its scales large, distinct; inner perianth- 
segments broad, rose-colored, acuminate; stamens and style much shorter than perianth-segments, 
but exserted beyond the throat; stigma-lobes white, slender, 6 or 7. 
Type locality: Southern Brazil. 
Distribution: Southern Brazil. 
This species may not be distinct from the following one. In collections of cacti, 
plants apparently intermediate in character are frequently found, as well as many hybrids. 
Pfeiffer (Enum. Cact. 70. 1837) gives Echinocactus multiplex as a synonym of Cereus 
multiplex, while the name was in use in the Botanical Garden in Berlin in 1829 (Verh. Ver. 
Beford. Gartenb. 6: 431. 1830). On the following page he describes the variety monstrosus. 
Other forms have been described as var. cossa, picta, and cristata under Echinopsis multiplex. 
This plant is common in cultivation. Some of the illustrations cited for this and 
the two following species may represent hybrid plants with one of these species as one 
of the parents. 
Illustrations: Watson, Cact. Cult. 80. f. 25; Dict. Gard. Nicholson 4: 512. f. 11, as 
Cereus multiplex cristatus; Dict. Gard. Nicholson Suppl. f. 365; Forster, Handb. Cact. 
ed. 2. f. 9; Grassner, Haupt-Verz Kakteen 1912: 16; Gard. Chron. III. 29: f. 80; Schelle, 
Handb. Kakteenk. f. 48; Méllers Deutsche Gart. Zeit. 25: 475. f.7, No. 12, as Echinopsts 
multiplex cristata; Dict. Gard. Nicholson 4: 512. f. 10; Curtis’s Bot. Mag. 66: pl. 3789; 
Watson, Cact. Cult. 79. f. 24, as Cereus multiplex; Monatsschr. Kakteenk. 16: 89, as 
Echinopsis multiplex monstrosa; Monatsschr. Kakteenk. 6: 103; Pfeiffer and Otto, Abbild. 
Beschr. Cact. 1: pl. 4; Forster, Handb. Cact. ed. 2. 139. f. 8; Dict. Gard. Nicholson 
Suppl. f. 364; Riimpler, Sukkulenten 168. f. 92; Garden 84: 133; Méllers Deutsche Gart. 
Zeit. 25: 475. {. 7, No. 6. 
Plate vi, figure 2, shows a flowering plant in the collection of the New York Botanical 
Garden, received from the Missouri Botanical Garden. 
7. Echinopsis oxygona (Link) Zuccarini in Pfeiffer and Otto, Abbild. Beschr. Cact. 1: under pl. 4. 
1839. 
Echinocactus oxygonus Link in Link and Otto, Verh. Ver. Beférd. Gartenb. 6: 419. 1830. 
Cereus oxygonus Pfeiffer, Enum. Cact. 70. 1837. 
Echinocactus octogonus G. Don in Sweet, Hort. Brit. ed. 3. 283. 1839. 
Echinonyctanthus oxygonus Lemaire, Cact. Gen. Nov. Sp. 85. 1839. 
Plants subglobose, simple or somewhat clustered, about 25 cm. in diameter, somewhat glaucous; 
ribs 14, broad at base, rounded on back; spines about 14, short and stout, 2 to 4 cm. long; flowers 
usually from areoles halfway up the side of the plant, sometimes nearly 3 dm. long, the tube slender, 
nearly cylindric, its scales numerous and small; inner perianth-segments pale red, acute or acuminate. 
Type locality: Southern Brazil. 
Distribution: Southern Brazil, Uruguay, and northeastern Argentina. 
Pfeiffer (Enum. Cact. 70. 1837) and also Steudel referred ‘“Echinocactus sulcatus as a 
synonym of this species. £. sulcatus Link and Otto (Steudel, Nom. ed. 2. 1: 537. 1840) is 
supposed to be different from the last, but in any case it is only a name. 
; one sulcata occurs as a name in a paper by Wercklé (Monatsschr. Kakteenk. 15: 
180. 1905). 
Echinopsis wilkensii (E. eyriesii wilkensii Linke), E. rohlandii, and E. lagemannit 
Dietrich (E. eyriesii lagemannii Dietrich) are all mentioned by Schumann (Gesamtb. 
Kakteen 235. 1897) as hybrids of which E. oxygona is one of the parents. Schelle (Handb. 
