Cassipourea ceylanica (Gardn.) Alston (1925) (Rhizophoraceae) in
Karnataka
DivakarK. Mesta 1, Harsha V. Hegde2, Vinayak Upadhya 2, G.R. Rao 3, Ganesh R. Hegde 4 & S.D. Kholkute 2
1,2 Regional Medical Research Centre
(Indian Council of Medical Research), Nehru Nagar, Belgaum, Karnataka, India
3 Centre for Ecological Sciences,
Indian Institute of Science, Bangalore, Karnataka, India.
4 Department of Botany, Karnatak University, Dharwad, Karnataka,
India
1 Present address: Smt. Parvatibai Chowgule College of Arts and Science, Gogol-Margao, Goa, India
Email:
1 divakarmesta@rediffmail.com
Date of publication
(online): 26 October 2009
Date of publication (print): 26
October 2009
ISSN 0974-7907 (online) |
0974-7893 (print)
Editor: K. Ravikumar
Manuscript details:
Ms # o2195
Received 05 May 2009
Final received 15 September 2009
Finally accepted 18 September
2009
Citation: Mesta, D.K.,
H.V. Hegde, V. Upadhya,
G.R. Rao, G.R. Hegde &
S.D. Kholkute (2009). Cassipourea ceylanica (Gardn.) Alston (1925) (Rhizophoraceae) in
Karnataka. Journal of Threatened Taxa1(10): 530-532.
Copyright: © Divakar K. Mesta, Harsha V. Hegde, Vinayak Upadhya, G.R. Rao, Ganesh R. Hegde & S.D. Kholkute 2009. Creative Commons Attribution 3.0 Unported License. JoTT allows
unrestricted use of this article in any medium for non-profit purposes,
reproduction and distribution by providing adequate credit to the authors and
the source of publication.
Acknowledgement: Authors are
thankful to Dr. Gopalkrishna Bhatfor identification of plant specimen; Joint Director, Botanical Survey of
India, Southern Circle, Coimbatore (MH) for permission to compare the specimen
and library facility; Mr. Shankar, RMRC for the help in drawing and NMPB New
Delhi for financial assistance. Thanks are also due to the unknown referee for
critical comments and suggestions.
For Figures & Images –
click here
During a
medicinal plant collection survey tour in September 2008, Cassipourea ceylanica (Gardn.) Alston
belonging to the family Rhizophoraceae was collected
from Uttara Kannada (North Kanara)
District in the central Western Ghats of Karnataka. The voucher specimen of the collection is
deposited at the Herbarium of Regional Medical Research Centre (ICMR),
Belgaum. The identity was confirmed by
comparing with specimens housed at the Madras Herbarium (MH), Botanical Survey
of India, Southern Circle, Coimbatore.
The family Rhizophoraceaeis represented by 17 genera and 120 species (Zhong et
al. 2002). It is pantropical and all members are either trees or shrubs;
many are mangroves, widely distributed along tropical coastlines, while some
species of Carallia, Blepharistemmaand Cassipourea grow both in primary and successional moist inland forests. The genus Cassipoureaincludes 40 species, and C. ceylanica is known
to be distributed only in southern India and Sri Lanka. In India it has been recorded earlier from
Tamil Nadu (Nair & Henry 1983), Kerala (Beddome1872; Nayar et al. 2006), Orissa (Brahmam2001) and Goa (Prabhugaonkar et al. 2007). From Sri Lanka it was reported by William
& Fosberg (1981).
Trimen (1984) mentions
its commonness in low country in the dry districts and rarity elsewhere in most
regions of Sri Lanka. Gamble (1935)
reported it from Western Ghats of Tamil Nadu, in the hills of Tinnevelly, Tamil Nadu and Travancore (presently belong to
Kerala) at low elevations. Haines (1925)
reported it from Chilka lakeof Orissa. The plant was documented
again by Saxena & Brahmam(1995) from the same locality. Recently
it has been reported from northern Western Ghats in Goa, near a water fall,
with a population of only 12 individuals (Prabhugaonkaret al. 2007). The earliest record of
this plant in Karnataka was by Hooker (1878) who reported the distribution
range as “Maisor and Carnatic”
where Maisore is likely to be the Mysore of
Karnataka. Since its first report, this
plant has not been reported by any other subsequent workers in Karnataka. However, Gadgil et
al. (2004) mention that C. ceylanica is a
threatened species in Karnataka, based on the WCMC (UNEP) report without
quoting any voucher specimen. Therefore
the present record of this plant from Karnataka, after a gap of about 130 years
reaffirms its existence in the state.
The plant was sighted along a stream
bank in the evergreen forest patch of Ankola Taluka (Uttara Kannada District)
with a population of around 15 individuals. The detailed description of the plant with figures of different parts
and photographs (Fig. 1; Images 1-3) are provided to enable its easy
identification.
Cassipourea ceylanica (Gardn.)
Alston in Kew Bull. 1925: 251; Nayar et al. in Flower. Plants of Kerala, 2006; Prabhugaonkaret al. in Ind. J. For. 30(1), 81-82, 2007. Weihea zeylanica Baill.,in Adansonia iii, 38, 1862; Hooker in Fl. Brit.
Ind. ii. 441, 1878; Anstrutheria zeylanica Gardn. in Calc. Journ. Nat.
History vi. 344, 1846; Bedd., in Fl. Sylv. t. 194, 1872; Weihea ceylanica Baill., Brandis, Ind. Trees 306, 1906; Bourdillon, For. Trees of
Travancore, 171, 1908; Gamble, Flora Pres. Madras, 1, 460, 1935.
A large shrub or small evergreen tree,
branched from the base; young parts glabrous. Leaves simple, opposite, 4.5-11.5 x 2.5-5.5 cm, broadly ovate, rounded
at base, obtusely acuminate, entire, glabrous, shining above, rather paler
beneath; petioles ca. 6mm long; stipules interpetiolar, lanceolate,
acute, ciliate, ca. 4mm long. Flowers
bisexual, axillary, solitary, or rarely 2 or 3 on
short curved pedicels; buds small, globular, completely enclosed by two thick,
cup-shaped, rounded, ciliate bracts. Calyx-tubes shortly turbinate, adnate to the
ovary; segments 4-5, oblong-lanceolate, 11 x 8 mm,
acute, spreading, valvate, densely silky outside, persistant, accrescent,
ultimately deflexed. Petals 4-5, hypogynous, inserted under the margin of an obscure disk,
clawed, spathulate, 15 x 10 mm, fimbriate, white, cauducous. Stamens 16-30, hypogynous, inserted on the disk; filaments filiform; anthers oblong. Ovary superior, 3-celled
with two pendulous ovules in each cell; styles filiform,
persistent; stigma obscurely 3-lobed. Fruit a fleshy capsule, globose, tipped with
long persistent style, splitting into 3-4-valves, 3-celled, the cells
1-2-seeded. Seeds ovoid, arillate.
Flowering and fruiting:July-September. In the present locality
the plant was observed bearing flower buds almost throughout the year. Hooker
also mentions the prolonged nature (six months) of flower bud existence.
Habitat: Found along the
streams on steep slopes in association with Dimorphocalyx lawianus J. Hooker and Tricalysia sphaerocarpa (Dalz.)
Gamble. The location is close to a Myristica swamp with some endemic species like Gymnacranthera canarica(King) Warb., Dipterocarpus indicus Bedd. and two critically endangered tree species namely Syzygium travancoricumGamble and Madhuca bourdillonii(Gamble) Lam. (Chandran et al. 2008).
Distribution: Southern
peninsula in India and Sri Lanka. In India- along the
Western Ghats in Tamil Nadu, Kerala, Karnataka and Goa; Eastern Ghats in
Orissa.
The present report of C. ceylanica from Karnataka connects the presence between
Kerala and Goa States and there is every likelihood of
its occurrence elsewhere between these gaps along streams of some relic and
evergreen forests. Its rarity in the
Western Ghats and Eastern Ghats indicates its thinner population status and
therefore warrants immediate actions for its conservation and restoration. Occurrence of Gerrardine (Kato et al.
1984) and Sulfur-containing Amides Cassipoureamide -A
and -B in the stem wood (Ichimaru et al. 2000) of its
closely related C. guianensis Aubl. can be a clue for
further study of C. ceylanica for its chemical
composition and to explore its potential medicinal value.
Note: Among the Rhizophoraceaethis is the only genus with superior ovary. Presence of interpetiolar stipule can mislead it as a member of Rubiaceae. Trimen (1984) mentioned that the structure of flower is
completely thalamifloral and stated “hence Gardner
and others have referred it to Tiliaceae (Elaeocarpaceae) and Moon to Elaeocarpusitself to which its petals so much resemble”.
Specimens studied: India, Karnataka,Uttara Kannada District, Ankola,
18.xi.2008, Divakar K. Mesta, Harsha V. Hegde & Vinayak Upadhya, 468 (RMRC - Regional Medical Research Centre);
Tamil Nadu, Kanyakumari District, Inchikuzhi,
5.vii.1964, A.N. Henry & M. Chandrabose, 19275
(MH); Tinavalley, MundanthuraiGhats, 18.vi.1901, C.A. Barber, 19868 (MH); Panagudi,Kannu Pulicadu, 5.ii.1972,
B.D. Sharma, 17955 (MH); Manimuthar Dam, 18.x.1957,
K.M. Sebastine, 8795 & 8796 (MH).
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