Bhesa indica

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Bhesa indica
Bhesa indica Govindoo.jpg
Bhesa indica
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Centroplacaceae
Genus: Bhesa
Species:
B. indica
Binomial name
Bhesa indica
(Bedd.) Ding Hou

Bhesa indica is a flowering plant tree species in the Centroplacaceae family. It is distributed along the tropical wet evergreen forests of the Western Ghats of India. [1] It is considered synonymous with Bhesa paniculata by some authors.

Contents

Taxonomy

Bhesa indica has been considered as synonymous with Trochisandra indica, Kurrimia bipartita, Kurrimia indica, and Kurrimia paniculata. [2] [3] Other authors have distinguished Indian from Malayan species. Brandis noted that Trochisandra indica Bedd., reported from 3–6,000 feet in the Anamalai hills of the Western Ghats, should be referred to the southern Indian species, Kurrimia bipartita Lawson, instead of the Malayan species, K. paniculata Wall., as quoted by Lawson. [4] The two species were also distinguished by Ding Hou on the basis of flower and fruit characters. [1] The flowers of the two species differ in that Bhesa paniculata has solitary, paniculate inflorescence with deeply 5-lobed disk, extrorse anthers, and ovary with a tuft of hairs on top. B. indica has disk entire, anthers introrse, and glabrous ovary. In fruits, both species are characterized by paniculate infructescence and 2-lobed fruits with distinct pedicels, but the fruits are obovoid or cordate, 1-1.75 (up to 2) cm long and acute to attenuate at the base in B. paniculata, and oblong, 2.5–3 cm long and obtuse at the base in B. indica. [1]

Distribution

Considered together Bhesa indica and Bhesa paniculata are distributed in parts of southern India, Thailand, Malay peninsula, Indonesia, Borneo, and the Philippines. Bhesa indica is known from southern India, mainly from the Western Ghats, while B. paniculata extends also into parts of south-east Asia. Bhesa indica occurs along the Western Ghats from the Agasthyamalai hills in the south to the Anaimalai hills in the states of Tamil Nadu and Kerala, mainly in the evergreen forests from around 900 m to 1800 m. [5]

Characteristics

Evergreen trees of mature forest growing up to 30 m tall, with smooth, grey-brown bark. The branchlets are stout and cylindrical and carry scars of fallen leaves and stipules. The leaves are simple, alternate and clustered at twig ends, with large stipules up to 2.5 cm long that are caducous (lost through dehiscence). The petiole is 2.5 cm to 4.5 cm long, swollen at the base and tip and attached to a leaf that is 10–18 cm long and 4.5-8.5 cm wide, elliptic-oblong to narrow-ovate in shape. The leaf apex is obtusely acute or short acuminate and the leaf base is rounded. The leaves are leathery, shining above and below, darker green above and paler below, and hairless. The leaves have 11 to 20 pairs of distinct secondary nerves (raised beneath, parallel, and oblique to midrib), with fine parallel and percurrent tertiary nerves. The inflorescence is at the ends of branches formed as panicled racemes. The flowers are small and white. The fruit is a capsule, red, and prominently 2-lobed. The fruit contains a single seed per lobe. [6] [7]

Ecology

The tree is mostly restricted to mature evergreen forests in the Western Ghats, more common at elevations above 1000 m and less abundant in forest fragments. [8] It is considered a species of relatively narrow ecological amplitude and a characteristic species of an identified high elevation (1400 – 1800 m) wet evergreen forest type called the Bhesa indica – Gomphandra coriacea – Litsea spp. Type in the southern Western Ghats. [9] The fruits of Bhesa indica are dispersed by fruit bats and possibly other mammals such as macaques as in the case of other Bhesa species in south-east Asia [10] and Sri Lanka. [11] The seeds are recalcitrant, losing viability rapidly on drying (seed germination decreasing from 77% to 13% in a month). [12]

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References

  1. 1 2 3 Ding Hou, 1958. A conspectus of the genus Bhesa (Celastraceae). Blumea 4: 149–153.
  2. ↑ Nayar, T. S.; Beegam, A. Rasiya; Sibi, M. (2014). Flowering plants of the Western Ghats, India. Vol. 1 Dicots. Thiruvananthapuram, India: Jawaharlal Nehru Tropical Botanic Garden and Research Institute. p. 261. ISBN   978-81-920098-2-7.
  3. ↑ GBIF. "Bhesa indica (Bedd.) Ding Hou - Checklist View". www.gbif.org. Retrieved 2016-11-27.
  4. ↑ Brandis, Dietrich (1906). Indian trees: an account of trees, shrubs, woody climbers, bamboos and palms indigenous or commonly cultivated in the British Indian empire. London: Archibald Constable and Co. Ltd. (1990 reprint Bishen Singh Mahendra Pal Singh). p. 164. doi:10.5962/bhl.title.50463. hdl:2027/njp.32101048471120. ISBN   978-81-211-0051-9.
  5. ↑ Gamble, J. S., and C. E. C. Fischer (1915–1935). Flora of the Presidency of Madras, Parts I to XI. (3 volumes). Adlard and Son Limited, London.
  6. ↑ "Bhesa indica - CELASTRACEAE". www.biotik.org. Retrieved 2016-11-30.
  7. ↑ Bhesa indica (Bedd.) Ding Hou. [online] India Biodiversity Portal, Species Page. Available at: http://indiabiodiversity.org/biodiv/species/show/8309 [Accessed date Nov 30, 2016].
  8. ↑ Muthuramkumar, S.; Ayyappan, N.; Parthasarathy, N.; Mudappa, Divya; Raman, T. R. Shankar; Selwyn, M. Arthur; Pragasan, L. Arul (2006-03-01). "Plant Community Structure in Tropical Rain Forest Fragments of the Western Ghats, India1". Biotropica. 38 (2): 143–160. doi:10.1111/j.1744-7429.2006.00118.x. ISSN   1744-7429.
  9. ↑ Pascal JP, Ramesh BR, De Franceschi, D. 2004. Wet evergreen forest types of the southern Western Ghats, India. Tropical Ecology 45: 281–292.
  10. ↑ Lucas, Peter W.; Corlett, Richard T. (1998-01-01). "Seed dispersal by long-tailed macaques". American Journal of Primatology. 45 (1): 29–44. doi:10.1002/(SICI)1098-2345(1998)45:1<29::AID-AJP4>3.0.CO;2-Y. ISSN   1098-2345. PMID   9573441.
  11. ↑ Ashton, Mark S; Gunatilleke, C. V. S; Singhakumara, B. M. P; Gunatilleke, I. A. U. N (2001-12-01). "Restoration pathways for rain forest in southwest Sri Lanka: a review of concepts and models". Forest Ecology and Management. New Directions in Tropical Forest Research. 154 (3): 409–430. doi:10.1016/S0378-1127(01)00512-6.
  12. ↑ Kumar, K. Kishore; Chacko, K. C. (1999-02-01). "Seed Characteristics and Germination of a 'Shola' Forest Tree : Bhesa indica (Bedd.) Ding Hou". Indian Forester. 125 (2): 206–211. ISSN   2321-094X.
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