Dendrobium sanderae Rolfe var major 1909 SECTION Formosae Photo by Wikipedia.

Flower Spike Photo Photo courtesy of Dale and Deni Borders.

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Common Name Mrs. Sander's Dendrobium [English Nurseryman's wife and compiler of hybrid names late 1800's]

Flower Size to 4" [to 10 cm]

Found only in the mountains of Central Luzon in the Philippines at altitudes of 1000 to 1650 meters where it grows as a medium to large sized, hot to cool growing epiphyte on trunks of pine trees with erect, slightly thickened below the middle, longitudinally striate stem covered with leaf-sheaths that have black hairs and carrying to 40, ovate to narrowly ovate, bilobed at apex leaves and blooms in the spring through fall on a short, apical and lateral, raceme with 2 to 4, longlived flowers that arise from the nodes near the apex of the cane.

Plants should be allowed to dry out somewhat through the winter months and a reduction in fertilizer is beneficioal as well. Resume regular water and fertilizer after the initiation of new growth in the spring.

Synonyms Dendrobium sanderae var major Hort 1954; Dendrobium sanderae var. milleri Quisumb. 1958; Dendrobium sanderae var. parviflorum Anschutz ex Quisumb. 1949; Dendrobium sanderae var. surigaense Quisumb. 1951

References W3 Tropicos, Kew Monocot list , IPNI ; Encyclopedia of Cultivated Orchids Hawkes 1965; Orchidiana Philipiniana Vol 1 Valmayor 1984;; Orchid Species Culture; Dendrobium Bakers 1996; Orchids Australia Vol 10 No 4 1998 photo; Orchids of the Philippines Cootes 2001 photo fide; A to Z of South East Asian Orchid Species Vol 1 O'Byrne 2001 photo fide; Flora Malesiana Orchids of the Philippines Vol I Agoo, Shuiteman and de Vogel 2003; AOS Bulletin Vol 73 No 3 2004; The Dendrobiums H. P. Wood 2006; Australian Orchid Review Vol 72 No 2 2007 photo

Dendrobium sanderae var. major auct. 1954 Photo by Jay Pfahl Copyright Control ©

Another Variety

Dendrobium sanderae var. parviflorum Anschutz ex Quisumb. 1949 Photo courtesy of J. Cootes, Dr. E.F. de Vogel and Jaap Vermeulen and Their Netherlands National Herbarium Website. and Flora Malesiana Vol III

Flower Size 1.6 to 2" [4 to 5 cm]

With more slender stems, lanceolate leaves and much smaller flowers

References W3 Tropicos, Kew Monocot list , IPNI ; Orchidiana Philipiniana Vol 1 Valmayor 1984;; Orchid Species Culture; Dendrobium Bakers 1996; Orchids Australia Vol 10 No 4 1998 photo; Orchids of the Philippines Cootes 2001 photo fide; Flora Malesiana Orchids of the Philippines Vol I Agoo, Shuiteman and de Vogel 2003; The Dendrobiums H. P. Wood 2006

Dendrobium sanderae var. surigaense Quisumb. 1951 Photo courtesy of J. Cootes, Dr. E.F. de Vogel and Jaap Vermeulen and Their Netherlands National Herbarium Website. and Flora Malesiana Vol III

Differs from the norm by being a smaller plant, with slendere stems, narrower leaves and has flowers with relatively narrow oval petals with revolute margins and a much broader lip with revolute margins.

References W3 Tropicos, Kew Monocot list , IPNI ; Orchidiana Philipiniana Vol 1 Valmayor 1984;; Orchid Species Culture; Dendrobium Bakers 1996; Orchids Australia Vol 10 No 4 1998 photo; Orchids of the Philippines Cootes 2001 photo fide; Flora Malesiana Orchids of the Philippines Vol I Agoo, Shuiteman and de Vogel 2003; The Dendrobiums H. P. Wood 2006

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