Lasianthus stipularis Blume

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 : 30-31

59. Lasianthus stipularis Blume (1826–1827:997). Type: ― INDONESIA. Java, Salak, C. L. Blume s.n. (holotype

L0000708; isotype L0000709 both image!).

= Lasianthus stipularis var. novoguineensis Valeton (1911:498) . Type: ― INDONESIA. New Guinea, Irian Jaya, G. M. Versteeg 1228 (holotype L0305625; isotype L0305626, U0247139, images!). (Figure).

T hailand: —PENINSULAR. Ranong: Khlong Nakha Wildlife Sanctuary, 24 November 1974, R. Geesink, P. Hiepko & C. Phengklai 7573 (BKF), 7 September 1984, N. Fukuoka, T. Santisuk & W. Nanakorn T35953 (BKF), 6‒7 July 1993, C. Puff & K. Sridith 930706-1/4 (AAU, BKF, PSU, WU). Surat Thani: Khao Sok National Park, 25 October 1990, K. Larsen et al. 40898 (AAU, BKF, PSU), 5 May 2006, S. Gardner ST2690 (BKF, K). Phangnga: Sra Nang Manora, K. Chayamarit et al. 2674 (BKF). Krabi: 15 July 1992, K. Larsen et al. 43424 (AAU, BKF, PSU). Nakhon Si Thammarat: Khao Luang National Park, 27 February 2006, S. Gardner & P. Sidisunthorn ST2385 (BKF, K). Trang: Khao Chong, 11 September 1990, C. Puff & V. Urchirakal 900911-1/3 (AAU, BKF, PSU, WU).

Distribution: — Myanmar, Malaysia (Peninsular, Borneo), Brunei, Indonesia (Sumatra, Java, Kalimantan, Sulawesi, Moluccas), Philippines, Papua New Guinea, Thailand (Peninsular).

Ecology: —Moist evergreen forest, in shaded places at an elevation of 100‒ 600 m. Flowering in February‒March and fruiting in April‒June.

Notes: ― Lasianthus stipularis can be recognized by its large stipules that cover the cymes, easily observed both in the herbarium and in the field. Lasianthus stipularis is mostly glabrous, the leaf blades are membraneceous, apex cuspidate-caudate, base cuspidate-cuneate, stipules persistent, broadly ovate, covering the cymes, up to 1.5 cm long, cymes sessile, bracts numerous, linear to narrowly lanceolate and villous, 1‒1.5 cm long, drupes ovoid, glabrous, 4–5 mm diameter with 4 pyrenes.