Arundinella tengchongensis (Poaceae), a name at new rank and newly combined based on morphological and molecular data

To clarify the taxonomic status of Arundinella setosa var. tengchongensis
and its relationships with A. setosa var. setosa and other related
species, molecular phylogenetic analyses based on nuclear ITS and two
plastid DNA (matK and trnL-F) sequences, and morphological comparisons
using one-way ANOVA were carried out. Our results reveal that A. setosa
var. tengchongensis is recovered within a different clade and separated
from the type variety. Morphologically, A. setosa var. tengchongensis can
be easily distinguished from A. setosa var. setosa and other varieties by
its smaller spikelets, shorter awns, and bearded nodes. Thus, A. setosa
var. tengchongensis is here elevated to the species rank and newly
combined as A. tengchongensis.