''Papilionanthe biswasiana'' is a species of epiphytic orchid native to

Laos Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...

, and

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...

. Is is closely related to ''

Papilionanthe vandarum ''Papilionanthe vandarum'' is a species of epiphytic orchid native to India, China, Myanmar, and Nepal. Is is closely related to ''Papilionanthe biswasiana''. Description This species is adapted to drought and can grow in full sun. Flexible, lon ...

''.

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 In botany, a stoma (from Greek ''στόμα'', "mouth", plural "stomata"), also called a stomate (plural "stomates"), is a pore found in the epidermis of leaves, stems, and other organs, that controls the rate of gas exchange. The pore is bor ...

are presented on the entire leaf surface. Most stoma were brachyparacytic and laterocytic, but some were stephanocytic. 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.

Conservation

This species is included in the

CITES CITES (shorter name for the Convention on International Trade in Endangered Species of Wild Fauna and Flora, also known as the Washington Convention) is a multilateral treaty to protect endangered plants and animals from the threats of interna ...

appendix II.

References

biswasiana Orchids of Myanmar Orchids of China Orchids of Laos Orchids of Thailand {{Vandeae-stub