The Cactaceae : descriptions and illustrations of plants of the cactus family . Piece of branch of S. macdonalilkic. 10. Selenicereus macdonaldiae (Hooker) Britton and Rose, Contr. U. S. Nat. Herb. 12: 430. macdonaldiae Hooker in Curtiss Bot. Mag. 79: pi. 4707. oldstems always terete, ioto 15 mm. in diameter; younger stems somewhat 5-angled, givingoff aerial roots, with rather prominent, flattened tubercles 1 to 5 cm. apart, 2 to 3 mm. high; spines BRITTON AND ROSE, VOL. -M E. Eaton <iel Flower on branch of Selenicereus coniflorus.(Natural size.) SELENICEREUS. 203
The Cactaceae : descriptions and illustrations of plants of the cactus family . Piece of branch of S. macdonalilkic. 10. Selenicereus macdonaldiae (Hooker) Britton and Rose, Contr. U. S. Nat. Herb. 12: 430. macdonaldiae Hooker in Curtiss Bot. Mag. 79: pi. 4707. oldstems always terete, ioto 15 mm. in diameter; younger stems somewhat 5-angled, givingoff aerial roots, with rather prominent, flattened tubercles 1 to 5 cm. apart, 2 to 3 mm. high; spines BRITTON AND ROSE, VOL. -M E. Eaton <iel Flower on branch of Selenicereus coniflorus.(Natural size.) SELENICEREUS. 203 several, 2 mm. long or less; flowers 30 to 34 cm. long; outer perianth-segments and upper scales linear,yellow, the outermost scales red or brownish; inner perianth-segments pure white, 10 mm. long,oblanceolate, 2 to 3 cm. broad at widest point, acute; tube proper 12 cm. long, clothed with smallscales bearing brown hairs and spines in their axils; fruit oblong, about 8 cm. long.
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Keywords: ., bookauthorbrittonn, bookcentury1900, bookdecade1910, bookyear1919
