Dai Jin-Hong, Van Do Truong, Liu Ying
School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, No. 135, Xin-Gang-Xi Road, Guangzhou 510275, China.
PhytoKeys. 2023 Nov 3;235:1-19. doi: 10.3897/phytokeys.235.112133. eCollection 2023.
is a genus currently treated in the polyphyletic . Recent phylogenomic analyses have identified a morphologically cohesive lineage referred to as the (raphides) clade, which should be excluded from and treated as a distinct genus under the name . Morphological and phylogenomic data have confirmed that four new species collected from Vietnam are part of the (raphides) clade. They are described herein as , , , and . is phylogenetically closest to , and morphologically to and , but is distinct in the 4- to 8-lobed calyx, 28 × 9 mm, apically long acuminate petals, and 1-2 mm pedicel at fruiting stage. , , and are phylogenetically most closely related. is characterized by its prostrate habit, small size, glabrous, obovate to obovate-lanceolate leaf blade, and solitary flower. and resemble each other in habit, leaf size and shape, and sessile or near sessile inflorescences but can be easily distinguished by the indumentum of the stems and leaves.
是一个目前在多系分类中处理的属。最近的系统发育基因组分析确定了一个形态上连贯的谱系，称为（针晶体）分支，应将其从 中排除，并以 之名作为一个不同的属来处理。形态学和系统发育基因组数据证实，从越南采集的四个新物种是（针晶体）分支的一部分。在此将它们描述为 、 、 和 。 在系统发育上最接近 ，在形态上与 和 相似，但在结果期具4至8裂的花萼、28×9毫米、顶端长渐尖的花瓣以及1至2毫米的花梗方面有所不同。 、 和 在系统发育上关系最密切。 其特征为匍匐习性、小型、无毛、倒卵形至倒卵状披针形的叶片以及单花。 和 在习性、叶大小和形状以及无柄或近无柄的花序方面彼此相似，但可以通过茎和叶的毛被轻松区分。
