Duhaldea eupatorioides (Wall. ex DC.) Anderb., Pl. Syst. Evol.

S., Shekhar, A. K., Pandey & Anderberg, A. A., 2020, The genus Duhaldea (Asteraceae) in India, Rheedea 30 (2), pp. 257-269 : 264

Duhaldea eupatorioides (Wall. ex DC.) Anderb., Pl. Syst. Evol. 176: 104. 1991. Conyza eupatorioides Wall., Numer. List no. 2993. 1831, nom. nud. Inula eupatorioides Wall. ex DC., Prodr. 5: 469. 1836; Hook.f., Fl. Brit. India 3: 295. 1881; C.E.C.Fisch., Rec. Bot. Surv. India 12: 105. 1938; Kumar in Hajra et al., Fl. India 13: 17. 1995. Type: NEPAL, s.loc., s.d., Wallich 2993 (K [K001118365 digital image!])

Fig. 4

Stout shrubs, 1–3 m tall. Stem pubescent, terete; branches brownish-purple. Leaves spirally arranged, rigid, leathery, shortly petioled; lamina elliptic-oblong or lanceolate-acuminate, 5–25 × 1.5–7.5 cm, coriaceous, irregularly toothed, cuneate or rounded at base, dark green above, scabrid, pale green below, pubescent, dense towards nerves, sometimes glandular, lateral nerves prominent, shorter, with much-reticulated nervation beneath. Corymbs polycephalous. Heads terminal or in upper axillary panicles; capitula crowned with short peduncles, 0.5–1.0 cm in diam. Involucral bracts 2–4 × 0.5–1.0 mm long, 4-seriate, lax, imbricate, lanceolate to linear-lanceolate, brownish, villous to velutinous, sometimes glandular at tip. Ray florets a few, shortly radiate. Disc florets tubular, 5- toothed. Cypselae narrowly obovate–oblong, 1.5– 2.0 × 0.25–0.5 mm, yellowish brown, sparsely white pubescent, 8–10-ribbed. Pappus uniseriate, bristles 22–24, 4–5 mm long, cream-golden.

Flowering & fruiting: Flowering and fruiting from August to February.

Chromosome number: 2n = 20 (Kumar & Subramaniam, 1987).

Habitat: Grows on rocky slopes, between 1700– 1800 m elevations.

Distribution: Bhutan, China, India, Laos, Myanmar, Nepal, Pakistan, Thailand and Vietnam.

Specimens examined: INDIA, Arunachal Pradesh, Anjaw district, Hayuliang , 25.11.1957, R . S . Rao 10807 ( CAL); Western side of Kalaktang, on hill slope in open places, 26.10.1973, 54550 (ASSAM) . Assam, Notring forest , 10.11.1838, K . Biswas 3849 ( CAL) ; Himachal Pradesh, Shimla district , s.d., s.coll. 237089 ( CAL); Shimla, 15.10.1877, Tara Devi 5647 ( CAL) . Jharkhand, Ranchi district, Kachapahar , 17.12.1957, G . Panigrahi 11936 (ASSAM). Manipur, West Imphal district, Khongal , on the frontier, 12.881, George Watt 6610 ( CAL) . Meghalaya, East Khasi Hills district, Khasia hills, 5.04.1894, G . A . Gammie 373 ( CAL); Khasia hills, 23.10.1913, Upendranath Kanjilal 2836 ( CAL); Khasia & Jaintia Hills, 9.11.1915, Upendranath Kanjilal 6169 ( CAL); Khasia, 1816, s.coll., 275 ( CAL); Khasi hills, 22.10.1871, C . B . Clarke 15582 ( CAL); Khasi hills, 28.10.1871, C . B . Clarke 16434 ( CAL); Khasi hills, 02.11.1872, Sohan Rai 17785 ( CAL); 30 mile from Cherrapunji road, 20.10.1914, Upendranath Kanjilal 4639 ( CAL); Near I . B . of Jowai, Khasi & Jaintia Hills , 28.10.1956, G . Panigrahi 4038 ( CAL); Between Sorarim and Mawphlong at north facing slope on rocky soils, 17.10.1967, A . S . Rao 45058, 45059 (ASSAM); Khasi hills, s.d., Upendranath Kanjilal 19775 ( DD); Khasi hills, 23.10.1913, Upendranath Kanjilal 13342 ( DD), 15625 (ASSAM); Khasi hills, 20.10.1914, Upendranath Kanjilal 4639 ( DD); Gorge Laithynkot, 09.11.1915, Upendranath Kanjilal 6169 (ASSAM); near Jowai, Khasi & Jaintia Hills, 28.10.1956, G . Panigrahi 4038 (ASSAM); Khasi & Jaintia Hills, 30 miles from Cherrapunji, 20.10.1914, Upendranath Kanjilal 4639 (ASSAM); Khasi & Jaintia Hills near Mynkrem forest , 05.11.1938, G . K . Deka 17175 (ASSAM); Khasi & Jaintia Hills , Heyhliang to Barapani , 25.11.1957, Rolla Sheshagiri Rao 10807, 15621, 15623, 15624 (ASSAM); Umdingpoh , 31 km from Shillong , 03.03.2009, S . Shekhar & A . K . Pandey 10041, 10043, 10127, 10130, 10131 ( DUH), East Jaintia Hills district, towards Jaintea , 19.10.1867, s.coll. 5992 ( CAL); West Jaintia Hills district , Jowai , 10.1892, King’s Collectors ( CAL); Jowai, 28.10.1956, G . Panigrahi 4038 ( CAL); s.loc., s.d., S . N . Bal 771 ( CAL); s.loc., s.d., A . B . Royle 237088 ( CAL); s.loc., s.d., V . Narayanaswami 136 ( CAL) . Mizoram, Lawngtlai , Blue mountain, 10.11.1999, A . A . Mao 61972 (ASSAM); Ibid. , 14.11.1999, A . A. Mao 63611 (ASSAM) ; Nagaland, Naga Hills district, Kegwinia, Naga hills, 02.10.1885, C . B . Clarke 41144 ( CAL); Naga hills, 1886, D. Prain 237068 ( CAL); Towards north Naga hills, 12.1907, A . Meebold 6920 ( CAL); Naga hills, Dalhousie valley , 1939, N . L . Bhor 90610 ( DD); Banrew forest , 06.02.1999, A . A. Mao 106305 (ASSAM) . Sikkim, s.loc., 02.1882, J . S . Gamble 10249 ( CAL); Near Jowai, 28.10.1956, G . Panigrahi 25515. Uttarakhand, Dehradun district, Sahasradhara , 04.10.1963, S . K . Malhotra 33827 ( BSD); on the way to Ghat, Chamoli district , 09.1993, Bipin Balodi 77755 ( BSD) . West Bengal, Darjeeling district, Mirick lake , 24.10.1841, K . Biswas 5899 ( CAL); Kurseong, on the way to Darjeeling , 15.11.1870, C . B . Clarke 13862 ( CAL); growing at top of the hills in Kuhi near Mahananda Wildlife Sanctuary, Darjeeling , 10.03.1995, S . Chandra & K . L . Maity 21594 ( CAL). Notes: This species is similar to D. cuspidata , but differs in much stouter habit, shorter and stouterpetioles, more rigid leaves with much reticulated nervation beneath and narrower ligules .

Figures

Fig. 4. Duhaldea eupatorioides (DC.) Anderberg: a. Habit; b-b3. Phyllaries (from outer to inner); c. Ray floret; d. Disc floret; e & e1. Anthers; f & f1. Style & stigma (a from D. Prain 237068 [CAL],b, c & d fromS. Shekhar 10041 [DUH],e & f from S.Shekhar 10041 [DUH]; drawn by S. Shekhar; scale bars: a 1 cm; b–f1 1 mm).