Lasianthus sarmentosus Craib (1933:25)

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 : 28

54. Lasianthus sarmentosus Craib (1933:25) . Type: ― THAILAND. Chanthaburi, Khao Soi Dao , 11 December 1924, A. F. G. Kerr 9614 (holotype K000777009!; isotype E00327849, BM001191351, K000777008, L0305533 images!). ( Figure 3 Ae).

T hailand: —SOUTH-EASTERN. Chanthaburi: Khao Soi Dao, 28 November 1979, T. Shimizu et al. T23865 (BKF), 18 November 1995, C. Niyomdham 4488 (AAU, BKF).

Distribution: ―Endemic to Thailand (South-Eastern).

Ecology: —Moist evergreen forest, in shaded places near streams at an elevation of 700‒1000 m. Flowering in June‒July and fruiting in August‒October.

Notes: ― Lasianthus sarmentosus can easily be recognized in the field by its mature fresh fruits that are pale-green which separates it from others species which mostly have blue fruits. However, it is similar to L. fordii from which it differs by having leaf blades membranaceous (not chartaceous or subcoriaceous), 3‒4 (not 4‒6) pairs of lateral veins, drupes that are globose and glabrous, 8‒10 (not 5‒6) mm diameter, and. with 3‒4 (not 5‒6) pyrenes.

Figures

FIGURE 3A‒O. Lasianthus werefound in Thai naturalforests:A) L. appressus;B) &C) L.attenuatus;D) L.chinensis;E) L.chrysoneurus; F) L. constrictus; G) L. cyanocarpus; H) L. ellipsoideus; I) L. ellipticus; J) L. fordii; K) L. foxworthyanus; L) & M) L. hirsutus; N) L. hispidulus and O) L. inodorus.