''Goniothalamus tenuifolius'' is a species of plant in the family Annonaceae. It is native to Peninsular Malaysia, Thailand and Vietnam.

George King George King may refer to: Politics * George King (Australian politician) (1814–1894), New South Wales and Queensland politician * George King, 3rd Earl of Kingston (1771–1839), Irish nobleman and MP for County Roscommon * George Clift King (184 ...

, the British botanist who first formally described the species, named it after its slender ( in Latin) leaved ( in Latin) foliage.

Description

It is a bush reaching 1.8-2.4 meters in height. Its young branches are hairless and dark colored. Its petioles are 5.1 millimeter long. Its slender, membranous, oblong to lance-shaped leaves are 11.4-17.8 by 2.5-4.4 centimeters with short tapering tips and pointed bases. Its leaves have 8-11 pairs of secondary veins emanating from their midribs. Its drooping, solitary flowers are born on

pedicels In botany, a pedicel is a stem that attaches a single flower to the inflorescence. Such inflorescences are described as ''pedicellate''. Description Pedicel refers to a structure connecting a single flower to its inflorescence. In the absenc ...

in axillary positions. The pedicels are 0.9-1.1 centimeters long with 2 basal

bract In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of ...

s. Its membranous, hairless, oval, green sepal are 0.7–1.9 by 0.5–1.5 centimeters with pointed to tapering tips. Its flowers have 6 petals in two rows of three. The white, lance-shaped, thin, leathery outer petals are 1.0–4.0 by 0.4–1.5 centimeters with tapering tips. The outer petals are covered in fine hairs. The oval inner petals are 5–14 by 3–8 millimeters with tapering tips. The outer petals are covered in fine hairs. Its flowers have few narrow, short ovaries, each with 1-2 ovules. Its long styles are thicker toward their apex. Its funnel-shaped stigma have a toothed edge. Its fruiting pedicel are 3-18 millimeters long. Its oval fruit 0.7 1-1.3 centimeters long and have persistent

calyx Calyx or calyce (plural "calyces"), from the Latin ''calix'' which itself comes from the Ancient Greek ''κάλυξ'' (''kálux'') meaning "husk" or "pod", may refer to: Biology * Calyx (anatomy), collective name for several cup-like structures ...

. Its fruit have 1-2 seeds.

Reproductive biology

The pollen of ''G. tenuifolius'' is shed as permanent tetrads.

Habitat and distribution

It has been observed growing in lowland forests at elevations of 50 to 900 meters.

Uses

Extracts from the leaves have been reported to have free radical scavenging activity using in vitro tests.

References

{{Taxonbar, from=Q15359188 tenuifolius Flora of Peninsular Malaysia Flora of Thailand Flora of Vietnam Plants described in 1892 Taxa named by George King (botanist)