Morphological Description and Taxonomy ofCompsopogonsp. (Compsopogonaceae,Rhodophyta) from Guangdong Province

Compsopogon specimens were collected in Dingnanshui River from Longchuan Countyꎬ Guangdong Province in August 2009. The morphological characters of the specimen were similar to Compsopogon caeruleus and C􀆰 sparsus. Plants were 10 -18 cm high and 180-270 μm in diameterꎬ main axes were slight constricted. Axial cells were nearly spherical and spheroidicꎬ 100-110 μm high and 150-200 μm in diameter. Cross wall was constricted apparently. Cortical cells were one layered while 2 3 layered at constricted axial cellsꎬ polygonal or ovoid shapedꎬ 25-35 μm longꎬ 20-25 μm in diameter. Branching horizontal and lateralꎬ some basal cells specialized as rhizoid on the plants. Apex of branches acuminateꎬ acute or binary. Monosporangia sphericalꎬ 10-14 μm in diameter. The specimen may be a transitive type of C􀆰 caeruleus and C􀆰 sparsus in evolution.