Goniothalamus rotundisepalus is a species of plant in the family Annonaceae. It is native to Peninsular Malaysia and Thailand.[1] Murray Ross Henderson, the Scottish botanist who first formally described the species, named it after its sepals which are rounded like the arc of a circle (rotundatus in Latin).[2][3]
| Goniothalamus rotundisepalus | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Magnoliids |
| Order: | Magnoliales |
| Family: | Annonaceae |
| Genus: | Goniothalamus |
| Species: | G. rotundisepalus
|
| Binomial name | |
| Goniothalamus rotundisepalus | |
Description
editIt is a bush reaching 1 to 2 meters in height. Its dark, young branches initially have fine red hairs, but become hairless when mature. Its papery, hairless, oblong to elliptical leaves are 10.5-23.5 by 3.5-8.5 centimeters with tips that taper to a point. Its leaves have 7-9 pairs of secondary veins that emanate from their midribs. Smaller veins create a fine network that gives the leaves a granular texture. Its solitary, pale green flowers are in supra-axillary positions. Its pedicels are 4-5 millimeters long and covered in sparse red hairs. Its sepals are rounded like the arc of a circle. The outer surface of the sepals are hairless or have fine sparse hairs and their inner surface is hairless. Its 6 leathery petals are arranged in two rows of 3. The lance-shaped outer petals are 2.5 by 1 centimeter and have sparse red hairs. The oval inner petals are 4-9 by 2.5-5.5 millimeters and have sparse red hairs on their outer surface and dense, coarse, brown hairs inside. Its flowers have 24-80 stamen. Its carpels have linear oblong ovaries covered in red hairs, thick style and two thick stigma surfaces. Its fruit are born on pedicels that are 4-8 millimeters long. The fruit are connect to the pedicels by 2-3 millimeter stipes.[3][4][5]
Reproductive biology
editThe pollen of G. rotundisepalus is shed as permanent tetrads.[4]
Habitat and distribution
editIt has been observed growing in lowland forests at elevations of 60 to 370 meters.[4]
References
edit- ^ "Goniothalamus rotundisepalus M.R.Hend". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved January 27, 2019.
- ^ Stearn, William (2004). Botanical Latin. Portland, Ore. Newton Abbot: Timber Press David & Charles. ISBN 9780881926279.
- ^ a b Henderson, M.R. (1927). "Additions to the Flora of the Malay Peninsula". The Gardens' Bulletin; Straits Settlements (in Latin and English). 4 (2&3): 48–56.
- ^ a b c Saunders, Richard M. K.; Chalermglin, Piya (2008). "A synopsis of Goniothalamus species (Annonaceae) in Thailand, with descriptions of three new species". Botanical Journal of the Linnean Society. 156 (3): 355–384. doi:10.1111/j.1095-8339.2007.00762.x. ISSN 0024-4074.
- ^ Saunders, Richard M. K. (2003). "A synopsis of Goniothalamus species (Annonaceae) in Peninsular Malaysia, with a description of a new species". Botanical Journal of the Linnean Society. 142 (3): 321–339. doi:10.1046/j.1095-8339.2003.00177.x. ISSN 1095-8339.
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