Dendrobium rigidifolium Rolfe 1899 SECTION Latouria

What is known as D alpinum?

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, 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 that blooms at most any time of the year with up to 10 per stem, 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 ; Orchidaceae Monandre-Dendrobiinae Fr. Kraenzlin 1910; 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 drawing ok; AOS Bulletin Vol 51 No 4 1982 drawing; Orchid Species Culture, Dendrobium Bakers 1996 as D rhomboglossum; Orchid Species Culture Dendrobium Bakers 1996; Orchids of Papua New Guinea Millar 1999 photo ok; Dendrobium and its Relatives Lavarack, Harris and Stocker 2000 photo good; Australian Orchid Review Vol 71 No 1 2006 photo; The Dendrobiums H. P. Wood 2006 photo fide for the first photo

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