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| Thunbergia amphaii Suwanph., K.Khamm., D.J.Middleton & Suddee in Suwanphakdee, Khammonkol, Middleton & Suddee, 2021. หนามแน่ขาวอัมไพ || DOI: 10.20531/tfb2021.49.1.06 |
ABSTRACT
Thunbergia amphaii, a new species from North-Eastern Thailand is described and illustrated. The pseudo-umbel inflorescence is diagnostic for this species. The pollen morphology, especially the size and the pericolpate aperture arrangement, further support this species as new to science.
Keywords: Endemic, North-Eastern Thailand, Pollen morphology, taxonomy, Lamiales
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| Thunbergia amphaii Suwanph., K.Khamm., D.J.Middleton & Suddee: A. Habit; B. Inflorescence; C. Flower; D. Calyx; E. Glandular hairs on calyx; F. Stamens; G. Longer and shorter stamens; H. Glandular hairs on filament; I. Anther; J. Bearded spur; K. Stigma; L. Capsule (photos A, D–K by Sangtawan Sriboran; B, C by Naiyana Tetsana; L by Kwanjai Khammongkol). |
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| Thunbergia amphaii Suwanph., K.Khamm., D.J.Middleton & Suddee: A. Branch with inflorescence; B. Flower (side view); C. Corolla opened out; D. Apex of longer stamen; E. Apex of shorter stamen; F. Pistil; G. Stigma; H. Capsule (from type: Tetsana, et al. 1846 (BK, BKF, K, SING), drawn by Sangtawan Sriboran). |
Thunbergia amphaii Suwanph., K.Khamm., D.J.Middleton & Suddee, sp. nov.
Similar to Thunbergia lutea T.Anderson in overall corolla tube shape but differing in the inflorescence being a terminal simple pseudo-umbel (vs a single axillary flower in T. lutea), bracteoles creamy white to white, elliptic-ovate to ovate, split on both sides for more than half of their length (vs reddish white to purplish red, elliptic, split on one side), calyx 5-lobed (vs 12–14 lobed in T. lutea), with glandular hairs on filaments (vs densely hispid at base in T. lutea), with a uniseriate row of glandular trichome hairs along the line of dehiscence on anthers(vs glabrous in T. lutea), capsule puberulous or scabrous and with glandular hairs (vs glabrous in T. lutea).
Etymology. —This species is named in honour of Mr Amphai Phaseeda, a park ranger at Phu Langka National Park who first found the plant.
Vernacular. —Nam nae khao amphai (หนามแน่ขาวอัมไพ).
Chalermpol Suwanphakdee, Kwanjai Khammonkol, David Middleton and Somran Suddee. 2021. Thunbergia amphaii (Acanthaceae) A New Species from Thailand. Thai Forest Bulletin (Botany). 49(1); 57-62. DOI: 10.20531/tfb2021.49.1.06
