Leptomischus anisophyllus T.P.Anh, B.H.Quang, Nuraliev & L.Wu, 2021

Anh, Tran Thi Phuong, Quang, Bui Hong, Nuraliev, Maxim S., Nguyen, Khang Sinh & Averyanov, Leonid V., 2021, Leptomischus anisophyllus (Argostemmateae: Rubiaceae), a new species from Vietnam, Phytotaxa 507 (2), pp. 198-204 : 199

Leptomischus anisophyllus T.P.Anh, B.H.Quang, Nuraliev & L.Wu , sp. nov. ( Figs. 1 , 2 )

Diagnosis: —Similar to Leptomischus erianthus , L. funingensis , L. hiepii and L. parviflorus , differing from them and from the other species of Leptomischus by the following combination of morphological traits: stems terete, pubescent when young, leaves mostly strongly anisophyllous, flowers distylous, corolla tube 10–15 mm long.

Type: — VIETNAM. Nghe An Province: Con Cuong District, Luc Da Commune, Pu Mat National Park , Kem waterfall area, 18°58’11.1’’N 104°48’01.9’’E, 261 m, 18 February 2017, H. Q . Bui 203 (holotype: HN; isotypes: CSFI, HN, LE, MW) .

Figures

FIGURE 1. Leptomischus anisophyllus. A. Habit. B. Living plants. C. Herbarium specimen; note strong anisophylly except for almost isophyllous basal node. D. Apical part of shoot with larger leaf viewed from below. E. Distal portion of stem; arrows indicate smaller leaves of pairs. Bui 203. Photos by H.Q. Bui.

FIGURE 2. Leptomischus anisophyllus. A, B. Inflorescence. C. Node with smaller leaf (left), stipule (center) and base of larger leaf (right). D. Detached stipule, adaxial view. E. Inflorescence, apical view. F. Flower bud, lateral view. G. Flower, apical view. H. Pin flower with corolla partly removed, lateral view; note stamens at corolla base. I. Corolla and stamens of thrum flower. J. Cross section of ovary. Bui 203. Photos by H.Q. Bui.