Jasminum bhumibolianum Chalermglin, 2013

Chalermglin, P. & Kiew, R., 2013, A new species of Jasminum (Oleaceae) from Thailand, Blumea 58 (1), pp. 80-81 : 80

Jasminum bhumibolianum Chalermglin , sp. nov. — Fig. 1

Similar to Jasminum extensum and J. pierreanum in its leaves, J. bhumibolianum is different from them in its calyx lobes 3–4 mm long (not 0.25–1 mm long), its short corolla 12–15 mm long (not 15–22 mm long) and its broader corolla lobes 3–4 mm wide (not 1–2 mm wide).

1 Thailand Institute of Scientific and Technological Research,35 Mu 3,Khlong Ha, Khlong Luang, Pathum Thani Province 12120, Thailand; corresponding author e-mail: [e-mail].

2 Forest Research Institute Malaysia, 52109 Kepong, Selangor, Malaysia. Foliis Jasminum extenso et J. pierreano similis, differt lobis calycis longis ( 3–4 mm nec 0.25–1 mm longis), tubis corollae brevibus ( 12–15 mm nec 15–22 mm longis), et lobis corollae latis ( 3–4 mm nec 1–2 mm latis). —Ty- pus: Chalermglin 520705 (holo BKF;iso BK, K, KEP,L, QBG), north-eastern Thailand, Loei Province, 5 July 2009 (flowers).

Etymology. The species is dedicated to His Majesty King Bhumibol Adulyadej on his 84th anniversary in recognition of the great efforts he has made to conserve native plants in Thailand.

Woody climber, at base stem to 1 cm diam, branches thin, 1–2 m long, whole plant glabrous except for some short hairs on young shoot. Leaves unifoliolate; petiole 4–5 mm long, glabrous; lamina elliptic to broadly lanceolate and ultimately mucronate, 6–8(–9.5) by 3–3.5 cm, chartaceous, base cune- ate to rounded, margin not recurved, apex acuminate, lower surface without domatia; venation pinnate, lateral veins 3–4(–7) pairs, obscure, basal pair similar to the upper, vein pairs evenly spaced, ascending and joining 2–3(–3.5) mm from margin, slightly impressed above and slightly prominent beneath, tertiary venation obscure. Inflorescence terminal on side shoots, slender, glabrous, cymose with 7–13(–19) flowers, sessile or sometimes with a peduncle 2–3 mm long; bracts foliose to 5–6 mm long, glabrous; lateral branches to 15 mm long. Flowers with all parts glabrous, strongly fragrant; pedicels 0.5–2 mm long; bracteoles 2, filiform, 0.3–0.5 mm long. Calyx: tube 1–2 mm long; lobes 4–5, triangular, 3–4 mm long, hard and spine-like, glabrous. Corolla: tube 12–15(–17) mm long, pale yellow below lobes; lobes 6–8, white, lanceolate, 10–12.5 by 3–4 mm, margin smooth, apex acute to shortly acuminate. Stamens with filaments 0.5–1 mm long; anthers 3.5–4 mm long, dehiscing by longitudinal slits, connective appendage acute. Ovary barrelshaped, 0.5–1 mm long; style 4–5 mm long; stigma 1.5–2 mm long; ovules 2. Fruits 1-lobed, ellipsoid, c. 11 mm long, c. 9 mm wide, ripening purple-black.

Distribution — Endemic to Loei Province, north-eastern Thailand. Known only from the type locality.

Ecology — In mixed deciduous forest, growing in a gully on a karst limestone mountain. Altitude 715 m. Flowering July- September; fruiting November-January.

Vernacular name — Mali Chaloem Narin (มะลิเฉลิมนรินทร์).

Conservation status — CR B1ab(iii). This new species, endemic to Thailand, is Critically Endangered ( IUCN 2001), because it is known from a single locality where only two plants were discovered and the area is not legally protected.

Additional specimen examined. Chalermglin 531121 (BK, BKF, K, KEP,

L, QBG), from type locality, 21 Nov. 2010 (fruits) .

© 2013 Naturalis Biodiversity Center

Figures

Fig. 1 Jasminum bhumibolianum Chalermglin. a. Habit; b. fruit (a: Chalermglin 520705, b: Chalermglin 531121).