最近的系统发育分析证实了伪类是多系的,中国的伪物种与日本的物种远缘。在中国的Pseudosasa物种中,假草是中国南方特有的一种形态独特且在分类学上有问题的物种,其中的通用名称仍不确定。基于质体和核基因组数据的分子分析表明,该物种最接近最近发表的Sinosasa属。形态学上,两者在每个分支的节点上发育的开花分支有点相似,花序的总状花序状单位,具3-5个短小穗,每个小穗几乎没有小花,包括先端有一个基本小花,每个小花具3个雄蕊和2个柱头。然而,P.pubiflora在许多生殖和营养特性上与Sinosasa物种非常不同,如副塔克拉迪亚(侧小穗“花梗”)的形态,帕拉克拉迪亚底部不存在或存在pulvinus,上颖的相对长度和最低的引理,小叶和初生茎芽的形状,分支补充,节点的形态,茎叶和干叶叶片,和每个最终小枝的叶子数量。形态学和分子证据保证了一个新的属的识别,以适应这个独特的物种,这里叫Kengiochloa.在查阅相关文献和检查植物标本室标本或标本照片后,对K.pubiflora及其同义词进行了分类学修订,确认了四个名字,viz.P.gracilis,Yushanialanshanensis,Arundinariatenuivinina和P.parilis,应该和K.pubiflora合并,而毁林和酸类是不同的物种。
Pseudosasa was confirmed as polyphyletic by recent phylogenetic analyses, with Chinese species of Pseudosasa distantly related to those from Japan. Among the Chinese species of Pseudosasa, Pseudosasapubiflora is a morphologically unique as well as taxonomically problematic species endemic to South
China, of which the generic designation is still uncertain. Molecular analyses based on both plastid and nuclear genomic data demonstrated that this species is closest to the recently published genus Sinosasa. Morphologically, the two are somewhat similar to each other in flowering branches developing at the nodes of every order of branches, raceme-like units of inflorescence with 3-5 short spikelets, each spikelet with few florets including a rudimentary one at the apex, and each floret with 3 stamens and 2 stigmas. However, P.pubiflora is very different from Sinosasa species in many reproductive and vegetative characters, such as the morphology of paracladia (lateral spikelet \"pedicels\"), the absence or existence of pulvinus at the base of paracladia, the relative length of the upper glume and the lowest lemma, the shape of lodicules and primary culm buds, the branch complement, the morphology of nodes, culm leaves and dried foliage leaf blades, and the number of foliage leaves per ultimate branchlet. The morphological and molecular evidence warrants recognition of a new genus to accommodate this unique species, which is here named Kengiochloa. After consulting related literature and examination of herbarium specimens or specimen photos, a taxonomic revision of K.pubiflora and its
synonyms was made, and it was confirmed that four names, viz. P.gracilis, Yushanialanshanensis, Arundinariatenuivagina and P.parilis, should be merged with K.pubiflora, while Indocalamuspallidiflorus and Acidosasapaucifolia are distinct species.