Killi
   
curve

Aponogeton nateshii
Aponogeton nateshii

Aponogeton nateshii S.R. Yadav, Rheedea 25(1): 9–13, 2015.
Perennial, tuberous, freshwater, aquatic herbs. Tubers 1.2–1.5 × 0.9–1 cm, globose-ovoid, elongated roots fibrous. Leaves totally submerged; petioles 9–10.5 cm long, channelled above, glabrous; lamina 17.5–30 × 4–6.8 cm, ovate-lanceolate, pale green, attenuate-rounded at base, undulate along margins, acute-obtuse at apex. Inflorescence a simple spatheate spike; spathes membranous, caducous, occasionally retained at the tip of the spike, acute-acuminate, enclosing young inflorescences. Peduncles up to 80cm long, cylindrical; spike simple. Tepals 2, 0.8–1.5 × 0.7–1.4 mm obovate, obtuse, concave, 1-nerved, fleshy, whitish, unequal. Stamens 6, in two whorls; anthers pale yellow, basifixed, dehiscing longitudinally; pollen yellow. Carpels 3, free; stigma decurrent; ovules usually 1 or rarely 2 per carpel. Follicles 3, beaked, ovoid, beak 2–6 mm long, curved. Embryo globular, with spirally arranged 10–12 ovate, green appendages (Image 1).
Specimens Examined: 372 (BSI, SUK and Herbarium of Department of Botany, Goa University, Goa (Image 2)), 17.x.2015, Surla, Khanapur Tehsil, Belgaum District, Karnataka, India, coll. S.S. Kambale & R.R. Kolte. Flowering & fruiting: August–October.
Distribution: India: Maharashtra and now also in Karnataka (Fig. 1).
Notes: Aponogeton nateshii is a recently described species, which was known only from its type locality. Its unique embryo bears 15–20 ovate-lanceolate, spirally arranged appendages (Yadav et al. 2015). The species grows in seasonal ponds along coastal plains of Konkan region of Maharashtra at an altitude of 68m. However, the population now located at Surla plateau (Karnataka part) is at an altitude of 828m. This indicates that the species is adapted to elevations ranging from 68–828 m. Certain variations have been noted in the population at Surla plateau: (1) the peduncle is up to 200cm long in the population at Konkan region while it is up to 80cm in the population located at Surla plateau. This variation seems to be because of the depth of water in the respective ponds; (2) there is reduction in the number of appendages of embryo, 10–12 in Surla plants as compared to 15–20 in Konkan plants. Hence it is found that this species is variable. Its occurrence on elevated plateaus in Karnataka indicates that the extensive surveys are necessary to locate this unique species at other places.

References:
Cook, C.D.K. (1996). Aquatic and Wetland Plants of India. Oxford University Press, London, 46–50pp.
The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 29th March 2016).
Kambale, S.S., R.R. Kolte & M.K. Janarthanam (2016). An extended distribution of recently described Natesh’s Cape-pondweed (Aponogetonaceae: Aponogeton nateshii ) to the state of Karnataka, India. Journal of Threatened Taxa 8(4): 8742–8744; http://doi.org/10.11609/jott.2395.8.4.8742-8744
Manawaduge, C.G., D. Yakandawala & D.H. Les (2016). Morphometric analysis reveals a new species of Aponogeton (Aponogetonaceae) in Sri Lanka. Phytotaxa 275(3): 243–262; http://doi.org/10.11646/phytotaxa.00.0.0
van Bruggen, H.W. (1985). Monograph of the genus Aponogeton (Aponogetonaceae). Bibliotheca Botanica Heft 137. Stuttgart: E. Schweizerbart’sche Verlagsbuchhandlung (Nägele u. Obermiller), 97pp.
Yadav, S.R. & S.P. Gaikwad (2003). A Revision of the Indian Aponogetonaceae. Bulletin of Botanical Survey of India 45: 39–76.
Yadav, S.R., V.S. Patil, A.R. Gholave, A.N. Chandore, U.S. Yadav & S.S. Kambale (2015). Aponogeton nateshii (Aponogetonaceae): a new species from India. Rheedea 25(1): 9–13.

nateshii-allt.jpg
nateshii-all.jpg
xs sm med lg
fruitt.jpg
fruit.jpg
xs sm lg
00-0-Copr_2018-Shrirang_Radavt.jpg
00-0-Copr_2018-Shrirang_Radav.jpg
xs sm med lg
01-0-Copr_2018-Shrirang_Radavt.jpg
01-0-Copr_2018-Shrirang_Radav.jpg
xs sm lg
02-0-Copr_2018-Shrirang_Radav.jpg
02-0-Copr_2018-Shrirang_Radav.jpg
legendt.jpg
legend.jpg
xs lg
mapt.jpg
map.jpg
xs sm lg
morpht.jpg
morph.jpg
xs sm lg
nateshiit.jpg
nateshii.jpg
xs sm med lg
newmapt.jpg
newmap.jpg
xs sm lg
newpondt.jpg
newpond.jpg
xs sm med lg
ovatet.jpg
ovate.jpg
xs sm med lg
pondt.jpg
pond.jpg
xs sm lg






 encycloquaria.com