Data from: Zornia melanocarpa (Leguminosae, Papilionoideae, Dalbergieae), a new species from Serra do Espinhaço, Brazil, and its phylogenetic position in the genus

Zornia melanocarpa , a new species of Leguminosae (Papilionoideae, Dalbergieae) from Serra do Espinhaço, Minas Gerais, Brazil, is described and illustrated. The species is characterized by black fruits with white hairs and an absence of bristles, characters unique within the genus. The species is morphologically similar to Z. crinita and Z. hebecarpa, but differs from both by having a shorter inflorescence of 1.2‐4 cm (vs. 10‐20 and 8‐20 cm in Z. crinita and Z. hebecarpa, respectively) and in the size of the plant (7‐16 cm vs. 20‐60 cm in Z. crinita and Z. hebecarpa), in addition to the black fruits with white hairs. A phylogenetic analysis using molecular data from the nuclear rDNA ITS gene region was performed to verify its position within the genus. Additionally, a survey of leaflet secretory structures and a micro-morphological analysis of fruit structures using scanning electron microscopy (SEM) was performed for the newly described species.

本文描述并图示了产自巴西米纳斯吉拉斯州埃斯皮尼亚苏山脉的豆科（Leguminosae）蝶形花亚科（Papilionoideae）黄檀族（Dalbergieae）一新种——Zornia melanocarpa。该种以具白色柔毛且无刚毛的黑色荚果为典型特征，该特征在本属中独一无二。该物种在形态上与Z. crinita和Z. hebecarpa近缘，但与二者存在显著差异：其一，花序更短，长度为1.2~4厘米（Z. crinita与Z. hebecarpa的花序长度分别为10~20厘米和8~20厘米）；其二，植株株高为7~16厘米（Z. crinita与Z. hebecarpa的株高为20~60厘米）；此外还具备上述被白色柔毛的黑色荚果这一关键特征。为明确该新种在该属中的系统发育位置，本研究利用核核糖体DNA（nuclear rDNA）ITS基因区域的分子数据开展了系统发育分析。此外，本研究还对该新种的小叶分泌结构进行了调查，并借助扫描电子显微镜（scanning electron microscopy, SEM）对其果实结构进行了显微形态学分析。