Sub-Tribe u. HYLOCEHEANAE HYLOCEREUS

These can be described as forest climbing cacti. They have long snake-like branches studded with beautiful blossoms with red, purplish or greenish sepals, and with white petals. There are about 18 species. They prefer half shade and warmth and in summer-time liberal watering. The flowers are nocturnal.

Hylocereus undatus. West Indies. Famous for its very large blooms, it is commonly met with in cultivation. The stems are deep green, much branched and triangular; the spines very short and thick. Frequently used as grafting stock for Zygocactus, Epi-phyllum, and Rhipsalis. Of easy cultivation in a mixture of 1 part loam, 1 part leaf-mould, and 1 part sand.

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