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2 13 



1. Deamia testudo (Karwinsky). 



Cereus testudo Karwinsky in Zuccarini, Abh. Bayer, Akad. Wiss. Munchcn 2: 682. 1837. 



Cereus pterogonus Lemaiie, Cact. Gen. Nov. Sp. 59. 1839. 



Cereus penlapterus Otto in Sahn-Dyek, Cact. Hort. Dyck. 1849. 221. 1850. 



Cereus miravullensis Weber, Bull. Mus. Hist. Nat. Paris 8: 459. 1902. 



Selenicereus miravallensis Britton and Rose, Contr. U. S. Nat. Herb. 12:431. 1909. 



Stems and joints various, 3 to 10 cm. broad, or perhaps even more; ribs thin, wing-like, 1 to 

 3 em. high; areoles 1 to 2 em. apart or on juvenile growth milch closer together; spines spreading, 

 10 or more, 1 to 2 em. long, brownish; flowers 28 cm. long, with a long slender tube 10 cm. long ex- 

 panding into a broad throat nearly as long as the tube; inner perianth-segments linear-oblong, 

 acuminate, 8 to 10 cm. long; stamens numerous; style slender, long, 24 to 25 cm. long; stigma-lobes 

 linear, numerous; scales on ovary 1 mm. long or less; hairs on ovary and flower-tube brown, 1 to 3 

 cm. long. 



Type locality: Mexico. 



Distribution: Southern Mexico to Colombia. 



Vaupel (Bliihende Kakteen 3: pi. 150. 1913) doubtfully refers here Cereus pentagonus 

 Vellozo, both described and figured by Vellozo (Fl. Flum. 5: pi. 22. text. ed. Netto 195). 

 Vellozo's plate, however, represents Cereus pernambucensis. 



This species, although described as Cereus testudo in 1837, has long been passing in 

 collections as Cereus pterogonus, a later name. It has a rather wide range and there is 

 considerable variation in stems and 

 flowers. It needs more detailed observa- 

 tion than it has yet received. 



Fig. 292. — Mediocactus megalanthus. 



Fig. 293. — Deamia testudo. 



Illustrations: Bliihende Kakteen 3: pi. 150; Curtis's Bot. Mag. 89: pi. 5360, both as 

 Cereus pterogonus. 



Figure 293 is from a photograph taken by E. A. Goldman near Carrizal, Vera Cruz, 

 Mexico, in 1901 ; figure 294 shows branches from a plant sent from Costa Rica in 191 1 . 



