174 



THE CACTACEAE. 



1. Cleistocactus baumannii Lemaire, Illustr. Hort. 8: Misc. 35. 1861. 



Cereus baumannii Lemaire, Hort. Univ. 5: 126. 1844. 



Cereus colubrinus Otto in Forster, Handb. Cact. 409. 1846. 



Cereus tweediei Hooker in Curtis's Bot. Mag. 76: pi. 4498. 1850. 



Aporocactus baumannii Lemaire, Illustr. Hort. 7: Misc. 68. i860. 



Aporocactus colubrinus Lemaire, Illustr. Hort. 7: Misc. 68. i860. 



Cleistocactus colubrinus Lemaire, Illustr. Hort. 8: Misc. 35. 1861. 



Cereus baumannii colubrinus Schumann, Gesamtb. Kakteen 133. 1897. 



Cereus baumannii flavispinus Schumann, Gesamtb. Kakteen 133. 1897. 



Cleistocactus baumannii colubrinus Riccobono, Boll. R. Ort. Bot. Palermo 8: 266. 1909. 



Cleistocactus baumannii flavispinus Riccobono, Boll. R. Ort. Bot. Palermo 8: 266. 1909. 



Somewhat branching at base, 2 meters high or more, 2.5 to 3.5 cm. in diameter, dark green; 

 ribs 12 to 16, low; areoles approximate, brown or black-felted ; spines acicular, 15 to 20, white, yellow, 

 or brown, 4 cm. long or less; flower orange to scarlet, 5 to 7 cm. long, narrow, 1 cm. in diameter, 

 curved, with oblique limb; scales on ovary and flower-tube ovate, acute; perianth-segments short 

 and broad, acute; stamens numerous, shortly exserted, appressed against the upper part of the 

 flower-tube; fruit 1 to 1.5 cm. in diameter, red with white pulp. 



Type locality: Not cited. 



Distribution: Argentina; reported also from Paraguay and Uruguay. 



Cereus subtortuosus Hortus (Forster, Handb. Cact. 409. 1846) was given as a synonym 

 of Cereus colubrinus. Cereus colubrinus flavispinus Salm-Dyck (Cact. Hort. Dyck. 1844. 32. 

 1845) seems never to have been described though Schumann takes it up under C. baumannii 

 and attributes it to Salm-Dyck. Forster in his 

 Handbuch refers it as a synonym of C. colubrinus. 



According to Weingart, C. grossei (Monatsschr. 

 Kakteenk. 18: 8. 1908) is only a variety of this 

 species, while C. anguinijormis (Monatsschr. Kak- 

 teenk. 18: 6. 1908) is true C. baumannii. 



Illustrations: Bluhende Kakteen 1: pi. 57; Mo- 

 natsschr. Kakteenk. 13: 139; Rep. Mo. Bot. Gard. 

 16: pi. 9, f. 2 to 5; pi. 12, f. 2, all as Cereus bau- 

 mannii; Curtis's Bot. Mag. 76: pi. 4498; Fl. Serr. 6: 

 pi. 559; Loudon, Encycl. PI. ed. 3. f. 19394, a ^ as 

 Cereus tweediei. 



Plate xxvii, figure 2 , shows a flowering top of a 

 plant in the New York Botanical Garden. 



2. Cleistocactus smaragdiflorus (Weber). 



Cereus smaragdiflorus'Weber , Diet. Hort. Bois 281. 1894. 

 Cereus baumannii smaragdiflorus Weber in Schumann, 

 Gesamtb. Kakteen 134. 1897. 



Stems slender, 2 to 2.5 cm. in diameter; ribs low, 

 12 to 14; radial spines numerous, acicular; central spines 

 porrect, several, stouter, the longer ones 2 cm. long, 

 yellowish to dark brown; flowers small, 4 to 5 cm. long, 

 straight, a little constricted above the ovary, the tube 

 and ovary red; upper scales on flower-tube and outer 

 perianth-segments with a long mucro; perianth-segments 

 small, green, acute to mucronate; filaments included; 

 style slightly exserted; stigma-lobes 5 to 8; fruit globose, 

 1.5 cm. in diameter; seeds small, black. 



Type locality: Not cited. 



Distribution: Provinces of Jujuy, Salta, Cata- 

 marca, and La Rioja, Argentina. 



We have known little of this species until quite recently. In 191 7 Dr. Shafer collected 

 on a dry sandy bank at Caliligua, Jujuy, a plant (No. 69) which was sent to the New York 

 Botanical Garden, where it flowered while this volume was going through the press. 



