Lasianthus fordii Hance (1885:324)

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 : 15

19. Lasianthus fordii Hance (1885:324) . Type: ― CHINA. Guangdong, Lo Fau Shan, August 1883, S. coll . 66 (holotype

BM000945611 image!; isotype K000763821!). ( Figure 3J ).

= Lasianthus zambalensis Elmer (1934:3209) . Type: ―PHILLIPPINES. Camp Stotsenburg, Mt. Pinatubo, Pampanga province, Luzon, May 1927, A. D. E. Elmer 22045 (isotype K000777092!, L0305702 image!).

T hailand: —NORTHERN. Chiang Mai: Doi Suthep Pui National Park, 29 November 1958, T. Sorensen, K. Larsen & B. Hansen 6335 (AAU, BKF), Doi Inthanon National Park, 25 July 1988, N. Fukuoka T62234 (BKF). Nan: Doi Phu Kha National Park, 7 October 1998, P. Srisanga 265 (AAU, BKF, QBG), 25 July 1988, N. Fukuoka T62234 (BKF, QBG). NORTH-EASTERN. Loei: Phu Kradung, 28 November 1965, M. Tagawa, K. Iwatsuki & N. Fukuoka T472 (BKF). CENTRAL. Nakhon Nayok: Khao Yai National Park, 14 October 1984, G. Murata et al. T52384 (BKF), 10 October 1999, S. Chongko 15 (BKF). SOUTH-EASTERN. Chanthaburi: Khao Soi Dao Wildlife Sanctuary, no date, T. Shimizu et al. T23734 (BKF), 27 November 1979, T. Shimizu et al. T23782 (AAU, BFF), 13 November 1969, C. F. Van Beusekom & T. Smitinand 2201 (BKF). PENINSULAR. Nakhon Si Thammarat: Khao Luang National Park, 24 August 1995, K. Larsen et al. 45983 (AAU, BKF, PSU).

Distribution: — India (Northeast), China, Japan (Yakusima, Kyushu, Ryukyu), Vietnam, Cambodia, Philippines (Luzon to Mindanao), Indonesia (Java, Sulawesi, Lesser Sunda Islands, Moluccas, Irian Jaya), Papua New Guinea, Thailand (Northern, North-eastern, Central, South-eastern, Peninsular).

Ecology: —Evergreen forest, in shaded places at an elevation of 300‒1200 m. Flowering in July‒October and fruiting in November‒February.

Notes: ― Lasianthus fordii is similar to L. lucidus but it differs by having leaves ovate-lanceolate to ovate-oblong 6‒10 × 3‒5 cm, leaf blades chartaceous, mostly with the calyx lobes shorter than the tube. L. lucidus has leaves ovate to ovate-elliptic 4‒9 × 1.5‒3 cm, leaf blades mostly coriaceous, and calyx lobes longer than or equal to the tube. Additionally, some characters of L. fordii as seen on herbarium sheets are similar to L. ellipsoids , but it differs from L. fordii in having densely pubescent branches and calyx lobes that are equal to or longer than the calyx tube, while L. fordii has glabrous to thinly appressed-pubescent branches and calyx lobes shorter than the tube.

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.