Deamia testudo Karwinsky

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

Cereuspterogonus Lemaire, Cact. Gen. Nov. Sp. 59. 1839.

Cereuspentapterus Otto in Salm-Dyck, Cact. Hort. Dyck. 1849. 221. 1850.

Cereus miravallensis 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 cm. high; areoles 1 to 2 cm. apart or on juvenile growth much closer together; spines spreading, 10 or more, 1 to 2 cm. long, brownish; flowers 28 cm. long, with a long slender tube 10 cm. long expanding 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 (Blühende Kakteen 3: pl. 150. 1913) doubtfully refers here Cereus pentagonus Vellozo, both described and figured by Vellozo (Fl. Flum. 5: pl. 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 flow-

Deamia Testudo
Fig. 292.—Mediocactus megalanthus. Fig. 293.—Deamia testudo.

Illustrations: Blühende Kakteen 3: pl. 150; Curtis's Bot. Mag. 89: pl. 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 1911.

Fig. 294.—Branches of Deamia testudo. X0.66.

6. WEBEROCEREUS Britton and Rose, Contr. U. S. Nat. Herb. 12: 431. 1909.

Epiphytic cacti, with slender, climbing or hanging stems and branches, these terete, angled or rarely flattened, emitting aerial roots, the areoles bearing a tuft of felt and sometimes several weak acicular bristles or spines; flowers pink, rose-colored or white, nocturnal, short-funnelform or funnelform-campanulate; ovary tuberculate, its areoles bearing weak filiform bristles or stiff hairs, the lower part of the flower-tube with a few similar areoles, the upper part with a few foliaceous scales; outer perianth-segments reflexed-spreading, blunt, linear-oblong, the inner ones narrower; ovary hairy or bristly; areoles of the fruit hairy.

Type species: Cereus tunilla Weber.

Three species are here recognized, two from Costa Rica and one from Panama. They are all rather insignificant plants, growing in trees as does Rhipsalis; the seedlings and juvenile growths are similar to those of species of that genus, but the large flowers and fruits are quite different.

The genus was named for Dr. Albert Weber (1830-1903) of Paris, who gave much attention to the cacti.

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