Goniothalamus tavoyensis

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Goniothalamus tavoyensis
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Magnoliids
Order: Magnoliales
Family: Annonaceae
Genus: Goniothalamus
Species:
G. tavoyensis
Binomial name
Goniothalamus tavoyensis

Goniothalamus tavoyensis is a species of plant in the family Annonaceae. It is native to Myanmar and Thailand. [1] Debabarta Chatterjee, who first formally described the species, named it after a town in Myanmar that at the time was called Tavoy, but has since be renamed Dawei. [2]

Contents

Description

It is a small tree. Its wrinkled, hairless, dark brown branches are circular in cross-section and have lenticels. Its petioles are 5-10 millimeters long. Its leathery, elliptical, hairless leaves are 10–25.5 by 3.5-6.5 centimeters with tapering tips and wedge-shaped bases. It leaves have 10-12 pairs secondary veins emanating from their midribs and their smaller veins give the leaves a granular appearance. Its solitary flowers are born on 5 millimeter-long pedicels in axillary to supra-axillary positions. The pedicels have minute lance-shaped bracts. Its 3 hairless, triangular to oval sepals are 4 millimeters long with edges that touch but are not fused. Its flowers have 6 petals in two rows of three. The thick, rust-colored, oval to lance-shaped outer petals are 8 by 4 millimeters with tapering tips. The thick inner petals have edges that are fused at their apex to form a cone. Its flowers have numerous short stamen that lack filaments. The stamen's anthers are 1.5 millimeters long and the connective tissue between the anther lobes extends up to form a 1.5 millimeters-long tapering cap. Its flowers have 7-10 hairless, narrow cylindrical carpels and rounded stigmas. Its hairless, elliptical fruit are 1.4-1.8 by 0.7-1 centimeters and occur in groups of 4–8. The fruit have hard pointed tips, tapering bases with persistent calyx. The fruit are born on 9-15 millimeters-long pedicels. The fruit are attached to the pedicels by 2-3 millimeters-long stipes. [2] [3]

Reproductive biology

The pollen of G. tavoyensis is shed as permanent tetrads. [3]

Habitat and distribution

It has been observed growing in evergreen forests at elevation of 0 to 1000 meters. [3]

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References

  1. "Goniothalamus tavoyensis Chatterjee". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved February 1, 2019.
  2. 1 2 Chatterjee, D.; Mukerjee, S.K. (1940). "Some New Plants From India and Burma". The Journal of the Indian Botanical Society (in English and Latin). 19 (1–3): 77–89.
  3. 1 2 3 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.