Journal of Threatened Taxa | www.threatenedtaxa.org | 26 January 2019 | 11(1): 13191–13194

Lectotypifiction of Impatiens duclouxii Hook.f., a new addition to the flora of India from Arunachal Pradesh

Rajib Gogoi¹, Umeshkumar L. Tiwari², Souravjyoti Borah³ & Bladimir Bajur Theodore Tham⁴

¹ Botanical Survey of India, Central National Herbarium, P.O. Botanic Garden, Howrah, West Bengal 711103, India.

^2–4 Botanical Survey of India, Arunachal Pradesh Regional Centre, Senki View, Itanagar, Arunachal Pradesh 791111, India.

¹ rajibbsi@yahoo.co.in, ² tigerumesh11@gmail.com (corresponding author), ³ souravjyotiborah@gmail.com, ⁴ damirtham@gmail.com

doi: https://doi.org/10.11609/jott.4376.11.1.13191-13194

Editor: K. Haridasan, Pallavur, Palakkad, India. Date of publication: 26 January 2019 (online & print)

Manuscript details: #4376 | Received 01 July 2018 | Final received 04 January 2019 | Finally accepted 09 January 2019

Citation: Gogoi, R., U.L. Tiwari, S. Borah & B.B.T. Tham (2019). Lectotypifiction of Impatiens duclouxii Hook.f., a new addition to the flora of India from Arunachal Pradesh. Journal of Threatened Taxa 11(1): 13191–13194; https://doi.org/10.11609/jott.4376.11.1.13191-13194

Copyright: Gogoi et al. 2019. Creative Commons Attribution 4.0 International License. JoTT allows unrestricted use, reproduction, and distribution of this article in any medium by adequate credit to the author(s) and the source of publication.

Funding: Botanical Survey of India.

Competing interests: The authors declare no competing interests.

Acknowledgements: The authors are grateful to Dr. Paramjit Singh, director (retired), and Er. A.K. Pathak, director I/c, of the Botanical Survey of India (BSI) and Dr. Prasanna, head of office, Central National Herbarium (CNH), BSI, Howrah, and Head of Office, BSI APRC, Itanagar, for the facilities provided and their encouragement. The authors thank Dr. Wojciech Adamowski, University of Warsaw, Poland, for his valuable comments on the determination of the species.

The floristic diversity of the northeastern region of India is not well-documented due to its inaccessibility and difficult terrain. Impatiens is one such floristic genus that is not well-documented from the state of Arunachal Pradesh, a part of the eastern Himalaya. The genus is represented in India by more than 210 species (Bhaskar 2012), of which 137 are endemic (Vivekananthan et al. 1997; Swaminathan et al. 2001). In the recent past, however, many new species of Impatiens were discovered (Gogoi & Borah 2013a, 2014, 2015a,b,c,d,e, 2017a,b; Gogoi et al. 2017a,b; Hareesh et al. 2016a,b, 2017a,b; Hareesh & Sabu 2017; Liden & Bharali 2017), rediscovered (Gogoi et al. 2013b), and extended in range (Gogoi & Borah 2013b; Borah et al. 2015; Gogoi et al. 2015a,b, 2016; Tiwari et al. 2018) in the region.

During two expeditions to the West and East Kameng districts of Arunachal Pradesh in 2014 and 2017, respectively, one specimen of Impatiens with red-spotted yellow-coloured flowers was collected. After critical examination of the specimen and of the detailed literature dealing with Impatiens of the Indian subcontinent and adjacent areas (Hooker 1875, 1908a,b, 1910; Toppin 1920; Grey-Wilson 1989, 1991; Vivekananthan et al. 1997; Swaminathan et al. 2001; Huang et al. 2003; Huang 2006; Chen et al. 2008, 2012; Pusalkar & Singh 2010; Dessai & Janarthanam 2011; Bhaskar 2012; Gogoi & Borah 2013a,b, 2014, 2015a,b,c,d,e; Gogoi et al. 2013, 2015; Ruchisansakun et al. 2014; Borah et al. 2015), the species was identified to be Impatiens duclouxii Hook.f. (Balsaminaceae). A perusal of literature revealed that the species was not reported from India so far. Hence, it is reported here for the first time with descriptions and colour illustrations for easy identification in the field.

Impatiens duclouxii Hook.f.

Nouv. Arch. Mus. Hist. Nat., sér. 4, 10: 245 1908; Chen et al., Fl. China, 12: 64. 2007.

Lectotype (designated here): China, Yunnan, 5,000ft, 1900, A. Henry 12559 K (K000694008), image!; isolectotype: China, Yunnan, 5,000ft, 1900, A. Henry 12559 E (E00313630) (Images 1 & 2).

Perennial, sparsely branched, up to 100cm tall. Stem terete, slightly ridged, hairy. Leaves confined to the upper part of the stem, alternate, petiole up to 5.5cm long, with glands, stipule absent; lamina elliptic to ovate, 8.5–13.5 x 4–5 cm, ventrally pubescent along nerves, dorsally glabrous, base cuneate to obtuse, apex acute to acuminate, margin serrate, setose between teeth, lateral veins to 11 pairs, subopposite. Inflorescence axillary, 3–5 flowered, peduncle up to 2.5cm long, glabrous, bud yellowish-green with red spots, pedicel to 1.5cm long, green, bracts at the base, triangular, persistent, apex acute, mid-vein indistinct, glabrous. Lateral sepals two, obovate to orbicular, greenish-white, sometimes with red spots, to 1.3 x 1.5 cm, apex minutely mucronate, margins entire. Lower sepal bucciniform, pale yellow, up to 2.5cm long, spur coiled, up to 1.2cm long, yellow. Upper petal obovate, pale yellow with red spots, to 2 x 1.7 cm, apex emarginated, dorsally with a prominent horn, horn pale green. Lateral united petals pale yellow with red spots in basal lobe, bilobed, subequal, up to 3cm long (whole), basal lobe obovate, apex slightly emarginate, up to 1.5cm long, 1cm wide, clawed, distal lobe dolabriform, apex obtuse, 2cm long, 1.3cm wide, basal auricle orange, triangular, 2mm long. Stamens five, united, upright, 8mm long, anther lobes acute. Capsule not seen.

Flowering & fruiting: July–November

Habitat: The species was found growing in a moist habitat at 30–45 ⁰C in a gentle slope along a small stream in Jamiri area in West Kameng District. It was later collected from Richikurung of East Kameng District, where the area is dominated by Terminalia myriocarpa, Ficus semicordata, Bauhinia purpurea, Saurauia roxburghii, Kydia calycina; the associated shrubs were Melastoma normale, Alpinia nigra, Musa acuminata, Trevesia palmata, Bambusa pallida, and Strobilanthes paniculata.

Distribution: China and India (West Kameng District in Jamiri, Arunachal Pradesh).

Conservation status: Chen et al. 2008 mentioned neither the distribution of the species in Yunnan in China nor its population. Herbarium records show that this species is represented by ca. 120-year-old collections. Therefore, it could have an extended distribution and new species record in India. Based on the distribution records, the authors would like to assess the species as Indeterminate (I) due to insufficient information on its distribution. Intensive explorations are required in similar habitats in adjacent areas for the possible location of the species. During the present survey, only 12 mature individuals were located, which were growing as undergrowth in a semi-evergreen forest along a stream.

Lectotypification: While describing this species, Hooker (1908) referred to three herbarium sheets of I. duclouxii as held at P, E & K (P - Herbarium,Muséum National d’Histoire Naturelle, Paris France; E - Herbarium, Royal Botanic Gardens, Edinburgh, EH3 5LR,. Scotland, UK; K - Herbarium, Royal Botanic Gardens, Kew, Richmond Surrey. TW9 3AE, England. UK. LWG). Among these, one sheet, A. Henry 12559 (K000694008) (Image 2), was selected as the lectotype. This sheet was examined by Hooker and found to closely match the protologue. Since the other sheets with the same collection number by A. Henry 12559 (E00313630) are regarded as part of the original gathering and match the protologue, it is here designated as an isolectotype.

Other specimens examined: 21969 (CAL), 27.x.2014, India, Arunachal Pradesh, West Kameng District, Jamiri, 1,200m, coll. R. Gogoi & B.B.T. Tham; 47947 (ARUN), 08.x.2017, East Kameng District, Palejee (Sube) on the way to Richikurung, 27.353⁰N & 92.770⁰E, 1,103m, coll. U.K. Tiwari.

For images / figures click here

Reference

Bhaskar, V. (2012). Taxonomic Monograph on Impatiens L. (Balsaminaceae) of Western Ghats, south India: The Key Genus for Endemism. Centre for Plant Taxonomic Study, Bangalore, 283pp.

Borah, S., R. Gogoi, P. Satyanarayana & S.-X. Yu (2015). Lectotypification of the name Impatiens toppinii Dunn, a new addition of the species for flora of India. Telopea 18: 33–37; https://doi.org/10.7751/telopea8324

Chen, Y.L., C.S. Akiyama & H. Ohba (2008). Impatiens, pp43–113. In: Wu, Z.Y., P.H. Raven & D.Y. Hong (eds.). Flora of China, Vol. 12. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, USA.

Dessai, J.R.N. & M.K. Janarthanam (2011). The genus Impatiens (Balsaminaceae) in the northern and parts of central Western Ghats. Rheedea 21(1): 23–80.

Gogoi, R. & S. Borah (2013a). Impatiens lohitensis, a new species of Impatiens (Balsaminaceae) from Arunachal Pradesh, India. Taiwania 58(1): 15–19; https://doi.org/10.6165/tai.2013.58.15

Gogoi, R. & S. Borah (2013b). Impatiens siculifer Hook.f. (Balsaminaceae) and Tricarpelema chinense D.Y. Hong (Commelinaceae), two additions to the flora of India from Lohit Valley of Arunachal Pradesh, India. Taiwania 58(2): 146–150; https://doi.org/10.6165/tai.2013.58.146

Gogoi, R. & S. Borah (2014). Impatiens paramjitiana, a new species of Balsaminaceae from Arunachal Pradesh, India. Phytotaxa 175(3): 171–175; https://doi.org/10.11646/phytotaxa.175.3.8

Gogoi, R. & S. Borah (2015a). Impatiens ashihoi, a new species of Balsaminaceae from Dibang Valley of Arunachal Pradesh, India. Phytotaxa 238(3): 278–282; https://doi.org/10.11646/phytotaxa.238.3.7

Gogoi, R. & S. Borah (2015b). Impatiens siangensis (Balsaminaceae), a new species from Arunachal Pradesh, India. Phytotaxa 192(2): 117–120; https://doi.org/10.11646/phytotaxa.192.2.5

Gogoi, R. & S. Borah (2015c). Impatiens adamowskiana sp. nov. (Balsaminaceae) from Arunachal Pradesh, northeast India. Nordic Journal of Botany 33(5): 586–590; https://doi.org/10.1111/njb.00798

Gogoi, R. & S. Borah (2015d). Impatiens dalaiensis (Balsaminaceae) a new species from Arunachal Pradesh, India. Phytotaxa 207(3): 286–290; https://doi.org/10.11646/phytotaxa.207.3.7

Gogoi, R. & S. Borah (2015e). Impatiens pathakiana (Balsaminaceae), a new species from Arunachal Pradesh, northeastern India. Telopea 18: 121–125; https://doi.org/10.7751/telopea8484

Gogoi, R. & S. Borah (2017a). Impatiens rugosipetala sp. nov. (Balsaminaceae) from Arunachal Pradesh, northeast India. Phytotaxa 35: 365–367; https://doi.org/10.1111/njb.01351

Gogoi, R. & S. Borah (2017b). Two new species of Impatiens L. (Balsaminaceae) from Arunachal Pradesh, northeast India. Webbia: Journal of Plant Taxonomy and Geography 72(1): 87–92; https://doi.org/10.1080/00837792.2016.1253913

Gogoi, R., W. Adamowski, N. Sherpa & G. Chhetri (2016). On the taxonomic identity and lectotypification of Impatiens uncipetala C.B.Clarke ex Hook.f. Phytotaxa 273(3): 207–211; https://doi.org/10.11646/phytotaxa.273.3.8

Gogoi, R., H.A. Barbhuiya & S. Borah (2013). Rediscovery of Impatiens laevigata var. grandifolia (Balsaminaceae) from NE India. Taiwania 58(4): 311–315; https://doi.org/10.6165/tai.2013.58.311

Gogoi, R., S. Borah & P. Satyanarayana (2015a). Impatiens fugongensis, I. yui and I. xanthina (Balsaminaceae), three new additions to flora of India. Journal of Japanese Botany 90: 270–275.

Gogoi, R., V.S. Hareesh & W. Adamowski (2017a). Impatiens zironiana (Balsaminaceae), a new species from Arunachal Pradesh, northeastern India. Webbia: Journal of Plant Taxonomy and Geography 72(1): 83–86; https://doi.org/10.1080/00837792.2017.1286773

Gogoi, R., N. Odyuo & R. Daimary (2015b). Impatiens parkinsonii C.E.C. Fisch. (Balsaminaceae), a new addition to flora of India and notes on its typification. Telopea 18: 383–387.

Gogoi, R., B.B.T. Tham, M. Lidén & S. Borah (2017b). Impatiens pseudolaevigata sp. nov. (Balsaminaceae): a new species from western Arunachal Pradesh, India. Phytotaxa 313(2): 227–230; https://doi.org/10.11646/phytotaxa.313.2.10

Grey-Wilson, C. (1989). Impatiens bicornuta and its allies: studies in Balsaminaceae: VII. Kew Bulletin 44(1): 61–66; https://doi.org/10.2307/4114645

Grey-Wilson, C. (1991). Impatiens L., pp82–104. In: Grierson, A.J.C. & D.G. Long (eds.). Flora of Bhutan, Vol. 2. Royal Botanic Garden, Edinburgh, UK.

Hareesh, V.S. & M. Sabu (2017). Impatiens nilalohitae (Balsaminaceae): a new species from northeastern India. Phytotaxa 323(2): 189–193; https://doi.org/10.11646/phytotaxa.323.2.7

Hareesh, V.S., S. Borah & M. Sabu (2017b). Impatiens walongensis (Balsaminaceae) - a new species from northeast India. Nordic Journal of Botany 317(3): 226–230; https://doi.org/10.11646/phytotaxa.317.3.7

Hareesh, V.S., R. Gogoi & M. Sabu (2016a). Impatiens pseudocitrina (Balsaminaceae), a new species from Arunachal Pradesh, northeast India. Phytotaxa 282(3): 231–234; http://doi.org/10.11646/phytotaxa.282.3.8

Hareesh, V.S., A. Joe, P. Prashob & M. Sabu (2016b). Impatiens roingensis (Balsaminaceae): a new species from northeast India. Webbia: Journal of Plant Taxonomy and Geography 71(2): 187–190; https://doi.org/10.1080/00837792.2016.1190503

Hareesh, V.S., A. Joe, R. Gogoi & M. Sabu (2017a). Impatiens arunachalensis (Balsaminaceae), a new species from northeastern India. Phytotaxa 305(1): 47–51; https://doi.org/10.11646/phytotaxa.305.1.7

Hooker, J.D. (ed.) (1875). Impatiens L. In: Flora of British India, Vol. 1. L. Reeve & Co., London, UK, 740pp.

Hooker, J.D. (ed.) (1908a). Impatiens, pp. 1851–1857. In: Hooker’s Icones Plantarum, Series 4(9). Dulau & Co., London.

Hooker, J.D. (1908b). Les espèces du genre Impatiens dans l’herbier du Muséum de Paris. Nouvelles annales du Muséum d’histoire naturelle, Paris, Series 4(10): 232–272.

Hooker, J.D. (1910). Indian species of Impatiens. Genesis Impatiens species Indicae novae et minus rite cognitae a Cl. A. Meebolddetectae. Bull Misc Inform Kew. 1910: 291–300.

Huang, S.H. (2006). Balsaminaceae, pp. 66–156. In: Yu, C.Y. (ed.). Flora Yunnanica, Vol. 16. Science Press, Beijing.

Huang, S.H., Y.M. Shui & W.H. Chen (2003). New taxa of Impatiens from Yunnan. Acta Botanica Yunnanica 25: 261–280.

Lidén, M. & P. Bharali (2017). Impatiens pyrorhiza sp. nov. (Balsaminaceae), a new species from east Himalaya. Nordic Journal of Botany 35(4): 411–416; https://doi.org/10.1111/njb.01547

Pusalkar, P.K. & D.K. Singh (2010). Three new species of Impatiens (Balsaminaceae) from western Himalaya, India. Taiwania 55(1): 13–23; https://doi.org/10.6165/tai.2010.55(1).13

Ruchisansakun, S., P. Triboun & T. Jenjittikul (2014). A new species of Impatiens (Balsaminaceae) from southwestern Thailand. Phytotaxa 174(4): 237–240; https://doi.org/10.11646/phytotaxa.174.4.5

Swaminathan, M.S., K. Vivekananthan & V.J. Nair (2001). Impatiens, pp. 2139–2157. In: Singh, N.P. & D.K. Singh (eds.). Florist Diversity and Conservation Strategy of India, Vol. 4. Botanical Survey of India, Kolkata, 478pp.

Tiwari, U.L., K. Chowlu & S. Borah (2018). Impatiens cyclosepala Hook. f. ex W.W. Sm. - a new species record for the flora of India from Arunachal Pradesh. Biodiversity Research and Conservation 49(1): 1–6.

Toppin, S.M. (1920). Notes on the Balsams of Chitral and the Kachin Hills. Bulletin of Miscellaneous Information (Royal Botanical Gardens, Kew) 1920(10): 345–367; https://doi.org/10.2307/4118598

Vivekananthan, K., N.C. Rathakrishnan, M.S. Swaminathan & L.K. Ghara (1997). Balsaminaceae, pp. 95–229. In: Hajra, P.K., V.J. Nair & P. Daniel (eds.). Flora of India. Botanical Survey of India, Kolkata.

Yilin, C.Y., S. Akiyama & H. Ohba (2012). Balsaminaceae of China, Vol. 12. Peking University Press, Beijing.