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

Flower Spike Photo Photo courtesy of Dale and Deni Borders.

To

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, 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 up to 40, ovate to narrowly ovate, bilobed at apex leaves and blooms in the spring through fall on a short, apical and lateral, 2 to 4 flowered inflorescence carrying 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 beneficial 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 ; Die Orchideen Schlechter 1915 photo good; Die Orchideen 2 Auflage Schlechter 1927 photo good; Flora of Malaya Vol 1 Orchids Holttum 1953; Encyclopedia of Cultivated Orchids Hawkes 1965; The Complete Writings on Philippine Orchids Vol 2 Quisumbing 1981 photo good; The Complete Writings on Philippine Orchids Vol 2 Quisumbing 1981 as D sanderae var milleri; Orchidiana Philipiniana Vol 1 Valmayor 1984; Orchidiana Philippiana Vol 1 Valmayor 1984 as D sanderae var major; Orchidiana Philippiana Vol 1 Valmayor 1984 as D sanderae var milleri; Orchidiana Philippiana Vol 1 Valmayor 1984 as D sanderae var parviflorum; Orchidiana Philippiana Vol 1 Valmayor 1984 as D sanderae var suriagaense; A Guide to Orchids of the World Hodgson, Paine & Anderson 1991 Photo fide; The Manual Of Cultivated Orchid Species Bechtel, Cribb & Laurent 1992 drawing fide; The Illustrated Encyclopedia of Orchids Pridgeon 1992 photo fide; Manual of Orchids Stewart 1995; Orchid Species Culture; Dendrobium Bakers 1996; Orchids Australia Vol 10 No 4 1998 photo; Dendrobium and its Relatives Lavarack, Harris and Stocker 2000 photo fide; Orchids of the Philippines Cootes 2001 photo fide; A to Z of South East Asian Orchid Species Vol 1 O'Byrne 2001 photo fide; Botanica's Orchids 2002 photo fide; Flora Malesiana Orchids of the Philippines Vol I Agoo, Shuiteman and de Vogel 2003; AOS Bulletin Vol 73 No 3 2004; Flora's Orchids Nash & La Croix 2005; The Dendrobiums H. P. Wood 2006 photo fide; The Dendrobiums H. P. Wood 2006 as D schuetzei photo fide; The Dendrobiums H. P. Wood 2006 as D suriagaense photo Australian Orchid Review Vol 72 No 2 2007 photo; Philippine Native Orchid Species Cootes 2009 photo fide; Philippine Native Orchid Species Cootes 2009 as D sanderae var luzonicum photo fide; Philippine Native Orchid Species Cootes 2009 D sanderae var major photo fide; Philippine Native Orchid Species Cootes 2009 D sanderae var parviflorum photo fide; Le Petit Larousse des Orchidees Lecoufle, Barthelemy & Schmidt 2013 photo fide; A Guide to the Dendrobium of the Philippines Cootes and Tiong 2015 photo fide; A Guide to the Dendrobium of the Philippines Cootes and Tiong 2015 as D sanderae var luzonicum photo fide; AOS Bulletin Vol 85 #1 2016 photo fide; AOS Bulletin Vol 88 #3 2019 photo fide;

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

Another Variety

References W3 Tropicos, Kew Monocot list , IPNI ; Orchidiana Philippiana Vol 1 Valmayor 1984; A Guide to Orchids of the World Hodgson, Paine & Anderson 1991 Photo fide; The Dendrobiums H. P. Wood 2006 photo fide; Philippine Native Orchid Species Cootes 2009 photo fide; Orchid Digest Vol 74 #1 2010 photo fide; Le Petit Larousse des Orchidees Lecoufle, Barthelemy & Schmidt 2013 photo fide; A Guide to the Dendrobium of the Philippines Cootes and Tiong 2015 photo fide;

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 ; The Complete Writings on Philippine Orchids Vol 1 Quisumbing 1981; The Complete Writings on Philippine Orchids Vol 2 Quisumbing 1981 drawing fide; 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; Philippine Native Orchid Species Cootes 2009 photo fide; The Dendrobiums H. P. Wood 2006 photo fide; Dendrobium of Borneo Wood 2014 photo fide; A Guide to the Dendrobium of the Philippines Cootes and Tiong 2015 photo fide;

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 more slender 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 ; The Complete Writings on Philippine Orchids Vol 2 Quisumbing 1981; The Complete Writings on Philippine Orchids Vol 2 Quisumbing 1981 drawing /photo fide; 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; Flora's Orchids Nash & La Croix 2005 photo fide; The Dendrobiums H. P. Wood 2006 as D suriagense photo fide; Philippine Native Orchid Species Cootes 2009 as D surigaense photo fide; A Guide to the Dendrobium of the Philippines Cootes and Tiong 2015 as D surigaense photo fide;

----------------------------------------------------------------------------------------------------------