Rhipsalis neves-armondii forma megalantha (Lofgren) Barthlott and N P Taylor in Bradleya 13 (1995)

Plants - stout, up to 1 cm. thick, at first erect but in time spreading or with pendent branches, dull green, often spotted with purple.
Areoles - rather prominent, especially after flowering.
Flowers - large, 4 cm. broad.
Petals - 8 to 12, oblong, often shortly acuminate or obtuse, white.
Filaments - erect, orange at base, rose-colored above.
Style - thick, longer than the stamens; stigma-lobes 6 to 8.
Fruit - surrounded with white hairs, rather small, 6 mm. in diameter, white or tinged with red.
Seeds - nearly black.
Type locality - Island of Sao Sebastiao, Brazil.

What is probably the original and only clone of the true R. megalantha is still in cultivation (e.g. at Univ. Bonn) and has exceptionally thick stem-segments and yellowish flowers to at least 4 cm in diameter. A form with somewhat smaller, silvery flowers and conspicuously pink stamens is also widely distributed in cultivation as R. megalantha and this is intermediate between Lofgren's extreme giant clone (which appears never to have been recollected) and the more typical, somewhat smaller-flowered type of the species. NB. The plant illustrated by Britton and Rose is referable to R. floccosa.

R. neves-armondii

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