Gigantochloa falcihumeris (Poaceae, Bambusoideae), a New Paleotropical Woody Bamboo Species From Southwest Yunnan, China

ABSTRACT A new species Gigantochloa is described and illustrated from Southwest Yunnan, China. The new species is similar to G. verticillata and G. felix in general appearance, but differs by its taller culms, internodes without stripes, culm leaf sheath shoulders prominent upward forming ca. 1 cm long falcate appendage, culm blade erect, culm leaf auricle absent, and culm leaf ligule ca. 5 mm tall. Additionally, we constructed a phylogenetic tree based on plastome and ITS sequences, which revealed that the new species clusters within the Gigantochloa clade.