e-Flora of Thailand

Volume 13 > Part 2 > Year 2016 > Page 206 > Compositae (Asteraceae) > Blumea

4. Blumea densiflora DC.wfo-0000044404

Prodr. 5: 446. 1836; Hook.f. , Fl. Brit. India 3: 269. 1881; Gagnep., Fl. Indo-Chine 3: 531. 1924; Randeria, Blumea 10: 234. 1960. Plate XIX: 4.


Accepted Name : This is currently accepted.



Synonyms & Citations :

Conyza densiflora Wall., Numer. List [Wallich] no. 2997, comp. no. 107: 103. 1831, nom. nud.
Blumea excisa DC., Prodr. 5: 446. 1836; Kerr, Fl. Siam. 2(3): 257. 1936.— B. densiflora var. excisa (DC.) C.B.Clarke, Compos. Ind. 89. 1876.
Conyza excisa Wall., Numer. List [Wallich] no. 3011, comp. no. 121: 104. 1831, nom. nud.
Blumea hookeri C.B.Clarke ex Hook.f., Fl. Brit. India 3: 269. 1881.— B. densiflora var. hookeri (C.B.Clarke ex Hook.f.) C.C.Chang & Y.Q.Tseng, Fl. Reipubl. Popularis Sin. 75: 23. 1979.
Conyza dasycoma var. pinnatifida Miq., Fl. Ned. Ind. 2: 56. 1856.— Blumea dasycoma var. pinnatifida (Miq.) Boerl., Handl. Fl. Ned. Ind. 2: 239. 1891.
Blumea klossii S.Moore, Journ. Nat. Hist. Soc. Siam 4: 148. 1921.


Description : Subshrub or shrub, 0.7–1.8 m tall; stems erect, pubescent. Leaves petiolate; elliptic, ovate or pinnatifidly lobed, 5–32 by 2–15 cm, apex acuminate or acute, base attenuate, margins serrate or dentate, coriaceous, upper surface pubescent with scattered glandular hairs, lower surface tomentose with glandular hairs; petioles 2–6 cm long. Inflorescences terminal, large panicles, 8–25 cm long. Capitula 3–6 mm diam.; peduncles slender, 2–5 mm long with pilose hairs and glandular hairs; involucres campanulate; phyllaries 5–6-seriate, pubescent with hairs and glandular hairs, outer lanceolate with entire margins, 2–8 mm, inner linear, herbaceous with broad scarious margins, with hairs and stipitate glands; receptacle 2–4 mm diam., flat, alveolate, glabrous or minutely fimbrillate. Marginal floret corollas yellow, basal tube 3.5–7 mm long, corolla lobes generally glabrous. Disc floret corollas yellow, basal tube 3.2–6.5 mm long, glabrous, lobes oblong-lanceolate, 0.4–0.6 mm long, pilose with multicellular and glandular hairs; anthers 1–1.5 mm long, apical appendages round, bases with branched tails, anther-tails shorter than anther collars; style arms 1–1.2 mm long, base swollen. Achenes oblong, 10-ribbed, 0.9–1.5 mm long, tomentose; pappus bristles (10–) 20–35, 3.5–7 mm long, persistent, reddish.


Thailand : NORTHERN: Mae Hong Son (Pai), Chiang Mai (Doi Suthep, Doi Inthanon, Doi Pha Hom Pok, Doi Chang, Muang Khu to Huai Thak, Doi Chong, Doi Khun Huai Pong), Nan (Ban Thin), Tak (Doi Pae Poe); SOUTH-WESTERN: Kanchanaburi (Khao Kamphaeng, Pilok); PENINSULAR: Phangnga (Khao Bangto), Narathiwat (Waeng).


Distribution : China (Yunnan), India, Bhutan, Nepal, Pakistan, Myanmar, Laos, Vietnam, Malaysia (Penang), Indonesia (Sumatra, Java), the Philippines (Negros), New Caledonia.


Ecology : Grassy slopes in evergreen forests, on waste slopes in old clearings or in open spaces of bamboo thickets, 1,000–1,800 m alt. Flowering: October–May.


Vernacular : Nat dok (หนาดดก)(Central).


Main
Plate XIX: 4
Blumea densiflora DC.