Duhaldea rubricaulis (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 : 266-267

Duhaldea rubricaulis (Wall. ex DC.) Anderb., Pl. Syst. Evol. 176 (1–2): 104 1991. Amphiraphis rubricaulis DC., Prodr. 5: 343. 1836. Inula rubricaulis (DC.) C.B.Clarke, Compos. Ind. 126. 1876; Hook.f., Fl. Brit. India 3: 296. 1881; C.E.C. Fisch., Rec. Bot. Surv. India 12: 105. 1938; Babu, Herbac. Fl. Dehra Dun 271. 1977; Naithani, Fl. Chamoli 1: 330. 1984; Kumar in Hajra et al., Fl. India 13: 25. 1995. Type: NEPAL, s.loc., s.d., Wallich 3223 (K [K001118848 digital image!]). Fig. 6

Erect shrubs, 1–2 m tall. Stems with long, slender, flexuous branches. Leaves sessile, elliptic–lanceolate, 10–15 × 2.5–4 cm, acuminate at apex, serrulate at margins, membranous, glabrous, nerves parallel to margins. Heads yellow, heterogamous, 0.5–2.0 cm in diam., 3–5 together in very short axillary racemes, forming a lax panicled raceme; peduncle stout, tomentose. Involucral bracts 4-seriate, imbricate, in whorls of unequal length, elliptic-lanceolate to linear-lanceolate, membranous, golden-yellow, densely pubescent with glandular tip. Ray florets radiate, 11–12 mm long, 3-lobed. Disc florets tubular, 7–8 mm long, 5-toothed, campanulate. Cypselae oblanceolate-elliptic, 1–1.5 × 0.25–0.5 cm, golden–yellow, pubescent, 10–12-ribbed. Pappus uniseriate, bristles 25–30, 5–7 mm long, goldenbrown, hairs not thickened at tips.

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

Habitat: On shady ravines or rocky slopes, rare in sheltered places, ascending up to 1500–2500 m elevation.

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

Distribution: Bhutan, China, India, Myanmar and Nepal

Specimens examined: INDIA, Arunachal Pradesh, West Kameng district, on way to Thungri village, 07.04.1957, G. Panigrahi 6589 (CAL); Thungri village to Rupa, 07.04.1957, G. Panigrahi, 13997, 13998 (ASSAM); Sela pass, along the road side, 21.09.1964, J. Joseph 40228 (CAL). Assam, Sibsagar district, Dullang, 06.04.1895, s.coll. 10492 (CAL). Manipur, s.loc., 1869, G. King 237104 (CAL). Meghalaya, East Khasi Hills district, Bishop’s fall, Shillong, 30.12.1885, C.B. Clarke 42625 (CAL); Khasia, 1873, C.B. Clarke 21894 (CAL); Shillong, 07.04.1886, C.B. Clarke 43346 (CAL); Shillong, Namdu to Sigri, 0 2.04.1958, Rolla Sheshagiri Rao 29955 (ASSAM); 6 km to Seha, 21.09.1964, J. Joseph 39836, 39837, 40228 (ASSAM). Nagaland, Naga Hills district, s.d., F. Kingdom Ward 11121 (CAL). Sikkim, 12.02.1885, G.A. Gammie 1205 (CAL); North Sikkim district, Punkabaree, 23.02.1871, Wallich 13903 (CAL); s.loc., 03.02.1876, G. King 237111 (CAL); s.loc., 04.1878, J.L. Lister 237112 (CAL); s.loc., 1879, G. King 237114 (CAL). Uttarakhand, Dehradun district, Mussoorie, 20.04.1897, P.W. Mackinnon 237101 (CAL); Ravine below Govt. Botanical Garden, Arnigarh, Mussoorie, 11.03.1904, Banwari Lal 33641 (DD); near Dhobhi ghat stream, Mussoorie, 10.04.1948, Robert L. Fleming 100835 (DD); near Kamptee fall, 19.04.1961, Hari Om Saxena 137229 (DD); Mussoorie, 22.04.1961, Hari Om Saxena 137904 (DD); Pauri Garhwal district, Ragsi reserve, North Garhwal, 09.04.1919, A.E. Osmaston 1039 (DD); Garhwal, 20.01.1920, C.F.C. Anon 1039 (CAL); Pithoragarh district, near Lilan, Pithoragarh, 23.04.1965, N.C. Nair 38705, 38706 (BSD); near Garjia, along the road side, Pithoragarh, 14.04.1984, Bipin Balodi 75528 (BSD); s.loc., 23.09.1998, B.P. Uniyal 93532 (BSD).

Figures

Fig. 6. Duhaldea rubricaulis(Wall.ex 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 Clarke 10492 [CAL], b, c & d from Panigrahi 6589 [CAL], e & f from Balodi 75528 [BSD]; drawn by S. Shekhar; scale bars: a 1 cm; b-f1 1 mm).