The plants were collected on scree slopes and in meadows around the summit of Huolu Shan, Yanyuan Xian, Sichuan in August 2010 (Fig. 2), and again on a meadow between Muli and Yanyuan in Muli Xian in August 2015 (Fig. 3). The flowering season is from May to July, which is the peak flowering period on the mountain. The plant species were identified according to its morphology and we proposed that this plant be named Faberia pinnatifida. A voucher specimen was deposited in the Herbarium of the Institute of Botany, Chinese Academy of Sciences, Beijing 100101, China (Specimen No. 2009001). To ensure the reliability of the diagnosis of the new species, a sample of the plant was examined by the first author with a microscope at the same time and in the same way as that of the collected specimens.
The morphology of F. pinnatifida is shown in Figure 1.
The plant is dioecious, the male specimens are clustered on lower branches, and the female specimens are clustered on higher branches. The stems are erect, unbranched, and usually less than 4 m tall. The leaves are narrow, light green, and elongate. The corolla lobes are slightly notched and purplish blue, up to 12 mm long, and densely pubescent. The sepals are triangular, obtuse, and the same color as the corolla lobes. The phyllaries are purple, glabrous, pinnatifid to pinnatipartite, oblong or linear-elliptic, with slight notches and slightly hairy on the midvein, and up to 4 mm in length. The bracts are filiform, approximately 1 mm long, and purple, glabrous. The calyx is purple, with a series of purple hairs along the midvein. The receptacle is purple, with a few yellow hairs. The seeds are beaked, oblong or semicircular, and purplish black.
In the early stages of fruit set of the plants in question, the flowers were white to yellowish-white, becoming purple-blue later. This change was noted in different plants, and was more dramatic in the Yanyuan population than that from Huolu Shan. As the fruits matured, the seeds became black. In the wild, fruits usually fall to the ground, but some were found on the plants by a local farmer after the death of the plants. The seeds collected from the plants are very short (1.7 to 2.1 mm long) with an olive-brown to blackish-brown color and a rather uniform shape (Figs 2, 3A). The fruit size is quite variable, ranging from 0.75 to 3.15 cm wide and 1.5 to 4.35 cm long. The seeds have an olive-brown to blackish-brown colored surface with a thin, blackish-brown, vertical slit (Fig. 2). The seeds are quite smooth (Fig. 3A). 827ec27edc