Gymnosperms of Laos

9 February 2014

Averyanov, Leonid; Nguyen, Tien; Nguyen, Khang; Pham, The; Lamxay, Vichith; Bounphanmy, Somchanh; Lorphengsy, Shengvilai; Phan, Loc; Lanorsavanh, Soulivanh; Chantthavongsa, Khamfa

Present review includes keys for identification and short data for all 33 species of gymnosperms hitherto recorded in the flora of Laos. They belong to 8 families and 15 genera. Important additions to these data were obtained during fieldwork occurring in 2009-2013, when 58 localities containing 25 species from 14 genera and 8 families were explored and initially studied. Two discovered species, Cycas laotica and Pinus cernua, are described as new species for science. Seven species - Cycas dolichophylla, C. inermis, C. macrocarpa, C. micholitzii, C. nongnoochiae, C. petraea and Taxus wallichiana, are found in Laos and represent new records for the flora of the country. Maps of distribution and illustrations for the newly discovered gymnosperm species are provided. All observations, records and discoveries are based on reliable scientific literature and collected voucher herbarium specimens housed in main regional herbaria.