Papilionanthe biswasiana is a species of epiphytic orchid native to Laos,LIMESTONE, R. PAPHIOPEDILUM CANHII IN LAOS PHOU PHACHAO MOUNTAIN–MOUNTAIN OF PAPHIOPEDILUM CANHII. China, Myanmar, and Thailand. It is closely related to Papilionanthe vandarum.
Description It is erect or pendulous, slender, long, wide, usually unbranched stems with internodes of in length. It bears distichously arranged, terete leaves. They are long and 3 to 4 mm wide and fleshy. Stomata are presented on the entire leaf surface. Most stoma were brachyparacytic and laterocytic, but some were stephanocytic.Fan, J., He, R., Zhang, Y., & Jin, X. (2014). Systematic significance of leaf epidermal features in Holcoglossum (Orchidaceae). PLoS One, 9(7), e101557. The inflorescences, which usually do not exceed the length of the leaves, produce 1 to 3 widely opening, creamy white or slightly pink, large and thinly textured flowers in spring.Hong, D. (2010). FLORA OF CHINA V25. MISSOURI BOTANICAL GARDEN PR.
Conservation This species is included in the CITES appendix II.
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