Journal of
Threatened Taxa | www.threatenedtaxa.org | 26 May 2018 | 10(6):
11827–11829
Clarke’s Morning Glory Ipomoea clarkei Hook.f. (Convolvulaceae):
addition to the flora of Eastern Ghats
L. Rasingam1, J. Swamy2 & M. Sankara Rao3
1,2,3 Botanical Survey of India, Deccan Regional
Centre, Sai Hills Colony, Attapur,
Hyderabad, Telangana 500030, India
1 rasingam@gmail.com (corresponding author),2 swamy.2706@gmail.com, 3 mudadlas@gmail.com
doi: http://doi.org/10.11609/jott.3553.10.6.11827-11829
Editor: B. Ravi
Prasad Rao, Sri KrishnadevarayaUniversity, Anantapuramu, India. Date
of publication: 26 May 2018 (online & print)
Manuscript
details: Ms # 3553 | Received 07 June 2017 | Final received 09 May 2018 |
Finally accepted 15 May 2018
Citation: Rasingam., J. Swamy &
M.S. Rao (2018). Clarke’s Morning Glory Ipomoea clarkei Hook.f. (Convolvulaceae):
addition to the flora of Eastern Ghats. Journal of
Threatened Taxa 10(6): 11827–11829; http://doi.org/10.11609/jott.3553.10.6.11827-11829
Copyright: © Rasingam et al. 2018. Creative Commons
Attribution 4.0 International License. JoTTallows unrestricted use of this article in any medium, reproduction and
distribution by providing adequate credit to the authors and the source of
publication.
Funding: Botanical Survey of
India, Kolkata (Project title: Flora of Nagarjunasagar – SrisailamWildlife Sanctuary (Tiger Reserve).
Competing interests: The authors declare
no competing interests.
Acknowledgements: The authors are grateful to Dr. ParamjitSingh, Director, Botanical Survey of India, Kolkata
for facilities and Dr. P. Lakshminarasimhan,
Scientist E and Dr. J. Jeyanthi, Scientist D for
sending the herbarium images.
IpomoeaL. one of
the largest genus of the family Convolvulaceae, is represented by c. 650 species and mainly distributed in
tropical and warm temperate regions of the world (Mabberley2008). In India, the genus is
represented by c. 65 species (Santapau & Henry
1973; Biju et al. 1998; Biju2002; Shimpale et al. 2012; Shimpaleet al. 2014; Sarvalingam et al. 2014), of which three
species and one variety, viz. Ipomoea clarkei Hook.
f. (Maharashtra), Ipomoea laxiflora H.J. Chowdhery & Debta (western
Himalaya, Uttarakhand), Ipomoea salsettensis Santapau &
Patel (Maharashtra), and Ipomoea deccanaAustin var. lobata (C.B. Clarke) Johari (Karnataka, Kerala and Maharashtra) are endemic to
India (Singh et al. 2015).
While
exploring the floristic wealth of Nagarjunasagar-SrisailamTiger Reserve, the authors have collected specimens of Ipomoea in
flowering and fruiting, which was later identified as Ipomoea clarkei Hook. f. Scrutiny of literature and
consultations of major herbaria revealed that this species has been so far
reported from Western Ghats of Maharashtra (Clarke 1885; Cooke 1908; Singh et
al. 2015). Hence, it is reported
here as a new addition to the flora of Eastern Ghats. A detailed description, notes, distributional map and colour photographs are provided to
facilitate identification.
Taxonomic treatment
Ipomoea clarkei
Hook.f., Fl.
Brit. India 4: 734 1885; Cooke, Fl. Bombay 2: 245.1908; P. Lakshiminaras.& Sharma, Fl. Nasik Dist. 327. 1991; Almeida, Fl.
Maharashtra 3B: 323. 2001; Venkanna & Das, Fl.
Maharashtra (Dicot.) 2: 460. 2001. Image 1 & 2
Specimen
examined: 10138 (BSID), 7.xii.2012, 16.0676310N 78.8378580E,Neelganga, Srisailam, Nagarjunasagar-Srisailam Tiger Reserve, Andhra Pradesh,
coll. L. Rasingam & M. Sankara Rao; 8005 (BSID), 23.x.2016, Saleswaram,
16.166630N & 78.636370E, Nagarjunasagar-SrisailamTiger Reserve, Telangana, 710m, coll. L. Rasingam & J. Swamy.
Annual slender twining herb. Stem slender, hairy, c. 1.2mm
in diam. Leaves 2.5–6 x 1.2–4 cm, ovate, deeply cordatewith rounded 0.8–1 cm lobes at base, entire along margins, long acuminate
at apex; acumen c. 1cm long, bulbous based hairy on both surfaces, 5-nerved at
base; petioles up to 3cm long, slender, sparsely hairy. Inflorescence axillary
solitary, 1-flowered cyme. Peduncle slender 7–12 mm long, sparsely hairy; bract c. 2mm long, subulate; bracteole 1-2, c. 1mm
long. Pedicel 8-15 mm long,
slender, hairy, slightly thickned towards the apex in
fruiting stage. Flowers yellow,
3–4 cm long. Calyx 7–8 mm long, 5 lobed; lobes slightly connate at
base, unequal, ovate-lanceolate, entire along margin,
acute-acuminate at apex, bulbous based hairy on upper surface, glabrous on inner surface. Corolla 3–4 cm
long, infundibuliform, tube 2.5–3.2 cm long,
limb c. 1.5cm in diam., glabrous. Stamens 5, unequal,1.2–1.5
cm long, epipetalous; filaments 0.9–1.2 cm long, slightly dilated and
hairy at base, glabrous and narrow towards apex;
anthers ovate c. 3 x 0.5 mm long. Gynoecium up to 2.2cm long, inserted; ovary ovate, c. 1.8 x 1.1 mm
long; style c. 2cm long; stigma globose, 0.5mm in
diam. Capsule globose or sub orbicular, c. 1 x 0.9 cm, beaked, glabrous, 4-seeded; seeds c. 5 x 4 mm long, oblong, puberulous, dark brown.
Flowering
and Fruiting: September–December.
Distribution:
Endemic to western peninsular India (Maharashtra: Nasik, Pune and Thane
districts); now from Eastern Ghats.
Habitat: Rare in mixed dry deciduous
forests and open rocky grasslands in association with Asparagus racemosus Willd., Heteropogon contortus (L.) P.Beauv.ex Roem. & Schult. and Pentanema indicum (L.) Ling. It is a very rare species collected from
only two locations in the Tiger Reserve, in Srisailamand Saleswaram, and found a few individuals in each
location.
Additional
specimens examined: s.n. (Kew Barcode No.
K001081777!), Malabar-Concan, coll. J.S. Law; s.n., (Kew Barcode No. K000830819!),
Malabar-Concan, coll. J.E. Stocks.
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