Grammatophyllum Blume, Bijdr. (1825) 377
Synonyms:
Often very large sympodial epiphytes with very short rhizomes. Pseudobulbs large, consisting of more than one internode, few- to many-leaved. Leaves sheathing, glabrous, deciduous, duplicate, leathery. Inflorescence arising from the base of the plant, a many-flowered raceme. Flowers large, resupinate, usually greenish or yellowish with brown to purple spots. Sepals free. Petals similar to or fairly different from the sepals. Lip without spur, not mobile. Column-foot absent. Pollinia 2, solid, cleft, caudicles absent, stipe present, U-shaped, viscidium present.
Southeast Asia, Malaysia, Indonesia, the Philippines, Papua New Guinea, east to Fiji. About 5 species; in New Guinea 4 species.
Epiphytes in lowland forest.
Grammatophyllum pantherinum and Grammatophyllum speciosum are certainly the largest orchids in New Guinea in terms of biomass - huge clumps of several meters across may be seen. At the base of the inflorescence there are always a few abnormal flowers that have only 2 sepals and 2 petals, the lip is absent, and the column is reduced and non-functional . Grammatophyllum scriptum has also abnormal flowers at the base of the inflorescence, but the fourth species known from New Guinea, Grammatophyllum stapeliiflorum, has all flowers normally developed.
Genus Grammatophyllum in New Guinea contains 3 sections:
Grammatophyllum section Gabertia
Grammatophyllum section Grammatophyllum
Grammatophyllum section Stichorchis
Genus Grammatophyllum in New Guinea contains 4 species with 2 carieties:
Grammatophyllum pantherinum
Grammatophyllum scriptum var. boweri
Grammatophyllum scriptum var. scriptum
Grammatophyllum speciosum
Grammatophyllum stapeliiflorum
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