Tectaria chinensis is a poorly known species from China, with its type being the sole authentic voucher to date. Recent field observations and morphological comparisons reveal its type being an incomplete frond, which resulted in the constant misinterpretation of some morphological characters and the allied species to T. chinensis. In fact, T. chinensis is a very special species restricted in southern China and northern Vietnam and featured by the unique long and erect caudex and the rare combination of partly free venation and vein-dorsal sori. Phylogenetically, T. chinensis was revealed by our previous analyses of five plastid regions to be in the Ctenitopsis group (Clade III or T. subg. Ctenitopsis), forming a sister clade to the lineage of T. fuscipes. A detailed description, explanatory illustrations, as well as distribution and habitat information of T. chinensis are provided.
Two new species of Ardisia (Myrsinaceae), A. banaensis C. M. Hu & L. K. Phan and A. sadirioides C. M. Hu & L. K. Phan, from Vietnam are described and illustrated. Their distribution, habitat, phenology and closely related species are discussed.
Song Thanh Nature Reserve (STNR) is located in Nam Giang and Phuoc Son districts, within Quang Nam province along the Vietnam-Laos border, included 93,249 ha of core zone and 108,398 ha of buffer zone. A total of 831 plant species were recognized in 1997 and 1999 by WWF. This study was implemented intend for building the plant specimen, which was operated in the core and buffer zone of Song Thanh Nature Reserve located in La Dee Commune, Nam Giang District. Total of 71 species, belonging to 40 families were represented in specimens; Fam. Rubiaceae and Fam. Euphorbiaceae are considered as the dominant species; Fokienia hodginsii (Dunn) A. Henry & HH Thomas and Helixanthera annamica Danser to be listed among the endangered species in the Vietnam Red Data Book (2007); 10 species of valuable medicinal plants, 3 species of valuable timber, 2 species of fruit trees.
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