''Goniothalamus griffithii'' is a species of

plant Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclud ...

in the family Annonaceae. It is native to

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 ...

. Joseph Dalton Hooker and Thomas Thomson the British botanists who first formally described the species, named it in honor of William Griffith, another British botanist who collected the specimen they examined.

Description

Its rough branches are dark gray. It has oblong, hairless, leathery leaves are 16.2 - 21.6 by 6.75 - 8.1 centimeters. The leaves are covered in minute translucent impressions. The undersides of the leaves are paler than the upper surfaces. Its petioles are 1.3 centimeters long. Its bent peduncles are the same length as its petioles and are scaly at their base. Its 1.8 centimeter long, rounded

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...

s are united at their base, covered in minute, fine hairs. Its flowers have 6 petals in two rows of 3. Its smooth, linear-oblong outer petals are thick and leathery and tapered at their base. The upper 1.3 centimeters of its inner petals are joined at their margins. Its

stamen The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filame ...

are linear-oblong with a fleshy tip that extends above the anthers. Its

gynoecium Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ''pistils'' ...

have ovaries that are covered in short rigid hairs and styles that have fluted ends.

Reproductive Biology

Pollen is shed as permanent tetrads.

Uses

Bioactive molecules isolated from its roots have been reported to have cytotoxic activity in tests with cultured human cancer cells.

References

griffithii Flora of Myanmar Flora of Thailand Taxa named by Joseph Dalton Hooker Taxa named by Thomas Thomson (botanist) Plants described in 1855 {{Annonaceae-stub