. Annual report of the Board of Regents of the Smithsonian Institution . lp surrounding the numerous smallblack seeds. Hylocereus trigonus is characterized by salient pointson the ribs, which bear the areolae. In H. triangularis the areolae aresituated in the notches of crenations. Closely allied to the latterspecies is a triangular cereus growing on the garden walls of the cityof Guadalajara, recently described by M. Robert Roland Gosselinunder the name Cereus tricostatus (pi. 6, fig. 1). This plant is char-acterized by its sharp, thin ribs, which are prominently gibbous be-tween the areoles.
. Annual report of the Board of Regents of the Smithsonian Institution . lp surrounding the numerous smallblack seeds. Hylocereus trigonus is characterized by salient pointson the ribs, which bear the areolae. In H. triangularis the areolae aresituated in the notches of crenations. Closely allied to the latterspecies is a triangular cereus growing on the garden walls of the cityof Guadalajara, recently described by M. Robert Roland Gosselinunder the name Cereus tricostatus (pi. 6, fig. 1). This plant is char-acterized by its sharp, thin ribs, which are prominently gibbous be-tween the areoles. The spines are quite small and few in ninnber,sometimes only two, or even solitary. The fruit is sold in the marketof Guadalajara, both fresh and dried, under the name pitahaya. o Oviedo. Hist. Gen. y Nat. de las Indias, lib. 8, Cap. 26, pi. 3, fig. 9. of Jose Amador de los Rios, p. 311. 1851. * See Cook and Collins. The Economic Plants of Porto Rico, Contr. U, Herbarium, vol. 7, p. 112, pi, 25, 1903, Smithsonian Rpport, 1908.—Safford. Plate Hylocereus trigonus (Haw.) n. com. Smithsonian Report, 1908.—Safford, Plate 13.
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
