Lasianthus sikkimensis Hooker (1880:180)

Napiroon, Tiwtawat, Chayamarit, Kongkanda, Dawson, Sally, Till, Walter & Balslev, Henrik, 2020, A synopsis of Lasianthus (Lasiantheae, Rubiaceae) in Thailand and two additional new species, Phytotaxa 439 (1), pp. 1-38 : 30

57. Lasianthus sikkimensis Hooker (1880:180) . Type: ― INDIA. Sikkim, J. D. Hooker & T. Thomson 11 (holotype K000031598!; isotype L0000706, L0000705, LE00017554 images!).

T hailand: —NORTHERN. Nan: Doi Phu Kha National Park, 10 September 1995, K. Larsen et al. 46316 (AAU, BKF, L, PSU), 21 August 2001, P. Srisanga & C. Maknoi 2008 (BKF, QBG, PSU). CENTRAL. Kamphaeng Phet: Khlong Lan National Park, 2 November 1997, M. van de Bult 47/48 (BKF).

Distribution: — India (Sikkim), Bangladesh, China, Vietnam, Philippines, Thailand (Northern, Central).

Ecology: —Hill evergreen forest and dry evergreen forest, in shaded places at an elevation of 600‒1200 m. Flowering in July‒August and fruiting in September.

Notes: ― Lasianthus sikkimensis is easily recognized in the herbarium and in the field; its branches and branchlets are densely brown-tomentose, the leaves are mostly chartaceous and lanceolate, 11–20 cm long, with caudate apex, acute base, 7‒10 pairs of lateral veins, 6‒15 mm long petioles that are tomentose, the stipules are broadly triangular or ovate, 3–4 mm long, densely tomentose, the bracts are persistent, linear or lanceolate, 10‒20 mm long and tomentose, the calyx tube is glabrous, calyx 5-lobed, hitsute, the drupes are ellipsoid, 6‒8 mm long, glabrous, with 5 pyrenes.