Epiphyllum laui Kimnach 1990
Plants vigorous, rampant vines, both epiphytes and litho-phytes. Stems branching basally or laterally, narrow and cylindrical basally to 1-2 cm (0.4-0.8 in) in diameter, the rest flattened, soft, linear, shiny green, the tips tinged reddish or brownish when young, 5-7 cm (2—2.8 in) wide, with prominent midribs, marginally lobed and undulate. Spines 1-5, hairlike, brownish yellow, 3-5 mm long. Flowers open in the evening, remaining open for at least 2 days, funnelform, 15-16 cm (5.9-6.3 in) long, 14-16 cm (5.5-6.3 in) in diameter; outer perianth parts reddish orange to yellow, inner white with yellowish tint. Fruits oblong, carmine red, 4-8 cm (1.6-3.1 in) long. Distribution: Chiapas, Mexico.
Continue reading here: Epiphyllum lepidocarpum f a c Weber Britton Rose 1913
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