Koyamasia curtisii var. tomentosa (Kerr) Bunwong, Chantar. & S.C.Keeley, 2014

Bunwong, Sukhonthip, Chantaranothai, Pranom & Keeley, Sterling C., 2014, Revisions and key to the Vernonieae (Compositae) of Thailand, PhytoKeys 37, pp. 25-101 : 77-78

publication ID

https://dx.doi.org/10.3897/phytokeys.37.6499

persistent identifier

https://treatment.plazi.org/id/9F4B3E24-EEE3-5C97-93DA-E6E004B21CA9

treatment provided by

PhytoKeys by Pensoft

scientific name

Koyamasia curtisii var. tomentosa (Kerr) Bunwong, Chantar. & S.C.Keeley
status

comb. nov.

Koyamasia curtisii var. tomentosa (Kerr) Bunwong, Chantar. & S.C.Keeley comb. nov.

Vernonia curtisii var. tomentosa Kerr, Fl. Siam Enum. 2(3): 238. 1936.

Type.

Thailand, Ratchaburi, A.F.G. Kerr 8997 (isotype: BK!, isotype: BM!, holotype: K!).

Description.

Herbs 20-100 cm tall. Stems erect, conspicuously ribbed, tomentose or villose. Leaves 5-10 by 2-6 cm, ovate or elliptic, margin serrate, apex acute to acuminate, base attenuate, chartaceous; upper surface scabrous; lower surface tomentose; lateral veins 7-12-paired; petioles up to 4 cm long. Capitulescences terminal, solitary or paniculate. Capitula campanulate, 11-13 mm long, pedunculate. Receptacle flat, glabrous. Involucres campanulate, in 6-7 series, 7-8 mm long, 8-10 mm in diam. Phyllaries imbricate, green with purple apex, margin piliferous, outer surface puberulous; the outer and the middle ones ovate to lanceolate, caudate, upper half strongly reflexed; the inner ones lanceolate to oblong, apex acute to acuminate. Florets ca. 60; corollas funnelform, purple; corolla tubes 7-8 mm long; corolla lobes 2-2.5 mm long. Anthers 2.8-3 mm long, apical appendage acute, base obtuse. Styles purple. Achenes clavate, 3-3.5 mm long, 10-ribbed, sparsely glandular. Pappus in 2 series of bristles, the inner ones 5-6 mm long, deciduous.

Distribution.

Thailand: Chiang Mai, Chiang Rai, Phayao, Kanchanaburi, Ratchaburi. Endemic.

Specimens examined.

Thailand. Chiang Mai, Chiangdao wildlife sanctuary, 19°26.08'N, 98°53.76'E, 25 Jul 1990, H. Banziger 702 (CMU); Chiang Rai, Doi Thung, 27 Aug 2000, S. Watthana 875 (AAU, QBG); Phayao, Pak Bok, 5 Sep 2006, S. Pumicong 443 (QBG); Kanchanaburi, 16 Aug 1971, C. Phengklai, B. Sangkhachand & B. Nimanong 2986 (K).

Diagnostic characters.

This plant differs from the typical variety by having tomentose hairs on the lower leaf surfaces.

Ecology.

Limestone mountain, alt. 200-1600 m; flowering June to August.

Vernacular name.

Hua Chai Wai Yarap (หัวใจไวยราพณ์).

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Koyamasia

Loc

Koyamasia curtisii var. tomentosa (Kerr) Bunwong, Chantar. & S.C.Keeley

Bunwong, Sukhonthip, Chantaranothai, Pranom & Keeley, Sterling C. 2014
2014
Loc

Vernonia curtisii

Bunwong & Chantaranothai & Keeley 2014
2014