Preliminary checklist of Hoya (Asclepiadaceae) in the flora of Cambodia, Laos and Vietnam

Abstract

This paper provides new data on 33 new or rare species of Hoya obtained in fieldwork mainly during 2012-2017 in eastern Indochina including Cambodia, Laos and Vietnam. These data include illustrated descriptions of three species new for science, as well as illustrated records of 24 species new for the floras of the studied countries. When these new data are included, the flora of eastern Indochina comprises at least 45 species. Among them eight species are recorded and documented for Cambodia, 21 sp. for Laos and 40 sp. for Vietnam; two new species are described in Vietnam (H. crassipetiolata and H. nutans) and one species is described from Laos (H. uniflora). Eighteen species were recorded newly for the flora of Vietnam (H.

Morphology of Hoya megalaster Warb. Ex K. Schumann & Lauterb and Hoya pachyphylla Warb. Ex K. Schumann & Lauterb (Apocynaceae) from New Guinea, Indonesia

“…About 200 species of Hoya have been described [17][18][19][20][21][22], but many Hoya species have not been identified or lack locality details.It is important to describe and identify species of Hoya, particularly of those that are threatened and endangered in their original habitat, including in the remote and logged areas in Papua. The key character for identification is the flower structure and morphology.…”

Morphological Characterization of Hybrids Derived from the Pollination of Hoya deleoniorum

“…H. subquintuplinervis (syn. H. pachyclada); naturally distributed in Cambodia, Laos, Vietnam, and Thailand; has unusually wide, succulent leaves with five-ply nerves [10,11]. The Peninsular Malaysian species H. peninsularis, sometimes known as Teddy Bear in the trade, is noteworthy for having a highly hairy corolla and pronounced leaf venations [12].…”