Sunday, October 23, 2022

[Botany • 2021] Impatiens vaiyapurii (Balsaminaceae) • A New Species from the Eastern Ghats of Tamil Nadu, India


Impatiens vaiyapurii   Karupp. & V. Ravich., 

in Karuppusamy, Ravichandran & Uday Kumar, 2021. 
 
Impatiens vaiyapurii is described as a new species from the Kolli hills of Eastern Ghats in Tamil Nadu, India. The species shares several morphological characters with I. dasysperma Wight, which is endemic to the southern Western Ghats

 Impatiens vaiyapurii sp.nov..
 A: Flowering branch. B: Flower front view. C: Lateral petal. D: Dorsal petal with ovary E: Spur. F: Anther. G: Seeds.
– Drawn by S. Karuppusamy

A-H. Impatiens vaiyapurii sp.nov.. A: Flowering branch. B: Flower front view C: Flower lateral view. D: Lateral petals. E: Pedicel with Ovary. F: Dorsal petal with spur. G: Capsule. H: Seeds.
I-N. I. dasysperma. I: Flowering branch. J-K: Flower. L: Capsule. M: Anther. N: Seeds.
– Photos. S. Karuppusamy

Impatiens vaiyapurii Karupp. & V. Ravich. sp. nov.

 Impatiens flaccida Arn. Sensu Mathew 
in Flora of Tamil Nadu Carnatic. 1.196.1983. Figs. 1 & 2

Impatiens vaiyapurii is morphologically similar to I. dasysperma, which is endemic to the Western Ghats. But it differs by its habitat of deciduous forests below 1000 m, leaves linear-elliptic, crowded on the tip of stem, petiole to 2–5 cm long, flowers white 3–3.5 cm across, dorsal petal broadly obcordate, cuneate at base, slightly divided, apical projection up to 1 cm long; lateral petals slightly lobed, notch without apical projection, lower petals obovate, cuneate at base, not divided at apex, without apical projection, spur to 5 cm long, glabrous, tip curved backward, pedicel up to 6 cm long, glabrous, capsule ovate, finely tomentose; seeds up to 20 per capsule, pale brownish with dome-like hair throughout (Table 1).

Distribution: So far known only from Kolli Hills of Namakkal District and Shevaroy Hills of Salem District in Eastern Ghats of Tamil Nadu, South India. 

Etymology: The new species is named in honour of Dr. M. Vaiyapuri, a renowned botany teacher in P.Velur, Namakkal district and environmentalist in recognition of his valuable contributions to plant taxonomy

 
Karuppusamy S., Ravichandran V. and Uday Kumar M. 2021. A New Species of Impatiens (Balsaminaceae) from the Eastern Ghats of Tamil Nadu, India. Species. 22(70); 342-347.