Thai Forest Bulletin (Botany)

A revision of Beilschmiedia (Lauraceae) for Thailand and Indochina

2021-02-02T10:03:00+07:00

A revision of the genus Beilschmiedia (Lauraceae) from Thailand and Indochina is presented with a summary of its taxonomic history, plus keys, full descriptions of each species, distribution maps, conservation assessments, ecological information, ethno-botanical notes and a discussion of its morphology. In this treatment, 21 species are recognized; 14 names are lectotypified (B. argentata, B. balansae, B. balansae var. muticarpa, B. clarkei, B. elegantissima, B. ferruginea, B. globularia, B. glomerata var. tonkinensis, B. lucidula, B. obovalifoliosa, B. palembanica, B. poilanei, B. sphaerocarpa and B. wightii), five names are placed into synonymy for the first time, and B. laotica Kosterm. ex de Kok is validly published here for the first time. In addition, one new variety (B. percoriacea var. percoriacea de Kok) is proposed and one new combination (B. percoriacea var. glaucoides de Kok) is made. Nine species are considered to be Least Concern, one is Critically Endangered, five are Endangered, and five are listed as Vulnerable.

Taxonomic notes on the Rutaceae of Thailand

2021-02-02T13:05:47+07:00

Nomenclatural problems with the name of Atalantia simplicifolia are discussed, and it is shown that the, often used, name of A. roxburghiana is illegitimate. Bergera is established as separate genus for Thailand, formerly part of Murraya. Murraya siamensis is established as a synonym of Bergera koenigii.

Curcuma lithophila and C. rufostriata (Zingiberaceae), two new species from Thailand, and additional notes on C. papilionacea

2021-02-06T15:43:06+07:00

Curcuma lithophila and C. rufostriata, two new species from Curcuma subgen. Hitcheniopsis, are described and illustrated. They are compared with their morphologically closest species, Curcuma rhabdota, C. papilionacea and C. sparganiifolia. Notes on distribution, ecology, etymology, uses and IUCN provisional assessments are provided. Further notes on the distribution of the recently described C. papilionacea and an improved IUCN conservation assessment are reported from additional collections.

Impatiens tanintharyiensis, a new record of Impatiens sect. Semeiocardium (Balsaminaceae) for Thailand

2021-02-08T08:49:35+07:00

Impatiens tanintharyiensis (Balsaminaceae) is reported in Thailand for the first time from a population in Ngao Waterfall National Park, Ranong Province. This population differs from that at the type locality in Myanmar by having smaller, purple flowers (vs bigger purplish-pink flowers). An expanded description of this taxon and colour photographs are provided.

Thyrsostachys (Poaceae: Bambusoideae) in Thailand: taxonomy, lectotypification and natural distribution

2021-03-16T15:33:19+07:00

A taxonomic account of the genus Thyrsostachys for Thailand, where its two recognized species, T. oliveri and T. siamensis, are among the most economically important and widely planted native bamboos, is provided. A second-step lectotypification of the name Thyrsostachys oliveri is proposed and information on the natural distribution of the genus is also included.

Thunbergia amphaii (Acanthaceae) a new species from Thailand

2021-03-18T14:17:50+07:00

Thunbergia amphaii, a new species from North-Eastern Thailand is described and illustrated. The pseudo-umbel inflorescence is diagnostic for this species. The pollen morphology, especially the size and the pericolpate aperture arrangement, further support this species as new to science.

Heterostemma menghaiense (Apocynaceae), a new record for Laos and Thailand

2021-03-24T12:55:19+07:00

Heterostemma menghaiense is reported as a new record for the flora of Laos and Thailand. A description based on Thai and Lao collections, photographs and notes are provided.

Two new species of Ilex (Aquifoliaceae) from Thailand

2021-04-21T15:59:33+07:00

Two new species of Aquifoliaceae are reported for Thailand. Ilex depressifructu is newly recorded from Umphang District, Tak Province (leaf blades ovate, ovate-oblong or oblong, base obtuse; infructescences solitary dichasia; fruits depressed globose with capitate stigma; pyrenes 5, shallowly-5-sulcate, 6-striate) and Ilex phanganensis (like I. umbellulata, but glabrous, smaller leaves, less veins, diplothyrsoid inflorescences with mainly alternate branches, less pyrenes), is newly recorded from Ko Phagnan Islands, Surat Thani Province. The descriptions and illustrations of the taxa are presented.