Dendrobium rigidifolium Rolfe 1899 SECTION Ceratobium
What is known as D alpinum? Photos by © Bandisch and PNG Orchid News website
Common Name The Rigid Leafed Dendrobium
Flower Size 1 to 2” [2.5 to 5 cm]
Found in New Guinea in montane rain forests on trees or on the ground at elevations of 2300 to 3800 meters as a medium to large sized, cool to cold growing epiphyte or terrestrial with ribbed, 12 to 18 noded canes carrying in the apical half, 3 to 9 well spaced, flat, ovate to oblong, leathery leaves with irregular, wavy and transparent margins and bloom with up to 10 per stem, at most any time of the year on several, 4 to 9” [10 to 23 cm] long, laterally, erect to spreading, 4 to 15 flowered inflorescence arsiing from the nodes towards the apex of the cane.
CAUTION Not sure of this determination I await further references.
Synonyms Dendrobium alpinum P.Royen 1979; Dendrobium giluwense P.Royen 1979; Dendrobium guttatum J.J.Sm. 1911; Dendrobium helenae Chadim 1966; Dendrobium rhomboglossum J.J.Sm. 1911; Sayeria rhomboglossa (J.J.Sm.) Rauschert 1983; Sayeria rigidifolia (Rolfe) Rauschert 1983
References W3 Tropicos, Kew Monocot list , IPNI ; The Orchids of The High Mountains of New Guinea P Van Royen 1979 as D alpinum drawing ok; The Orchids of The High Mountains of New Guinea P Van Royen 1979 drawing ok; The Orchids of The High Mountains of New Guinea P Van Royen 1979 as D giluwense drawing ok; The Orchids of The High Mountains of New Guinea P Van Royen 1979 as D guttatum drawing ok; The Orchids of The High Mountains of New Guinea P Van Royen 1979 as D rhomboglossum AOS Bulletin Vol 51 No 4 1982 drawing; Orchid Species Culture Dendrobium Bakers 1996; Australian Orchid Review Vol 71 No 1 2006 photo;
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