Pulvinatusia xuegulaensis J. P. Yue, H. L. Chen, Al-Shehbaz & H. Sun, 2022

Chen, Hong-Liang, Al-Shehbaz, Ihsan A., Qian, Li-Shen, Zhang, Jian-Wen, Xu, Bo, Zhang, Ti-Cao, Yue, Ji-Pei & Sun, Hang, 2022, Pulvinatusia (Brassicaceae), a new cushion genus from China and its systematic position, PhytoKeys 189, pp. 9-28 : 9

Pulvinatusia xuegulaensis J. P. Yue, H. L. Chen, Al-Shehbaz & H. Sun sp. nov.

Fig. 2

Description.

Herbs 0.9-1.6 cm tall; caudex many branched, to 4 mm in diam. Trichomes simple, to 0.6 mm long, mixed with fewer forked stalked ones. Leaves densely imbricate, (3.5-) 4.0-4.2 (-4.7) × 0.7-1 mm, thin, papery, long ciliate on both sides and margin. Flowers solitary on short pedicels originating from axils of basal leaves. Fruiting pedicels stout, 4.5-6 mm long, often hidden among basal leaves. Sepals oblong, 1-2 × ca. 1 mm. Petals whitish pink or pink; obovate to suborbicular, 3-3.5 × 2.5-3 mm, claw 2.5-3.4 mm long. Filaments 1.5-2 mm long; anthers 0.3-0.5 mm long. Ovules 2 or 3 per ovary. Fruit ovoid to ellipsoid, 1.6-1.9 × 0.8-1 mm; valves thick leathery, inflated, style 0.2-0.4 mm long. Seeds 1-1.5 × 0.7-0.9 mm, seed coat smooth, not mucilaginous when wetted; cotyledons accumbent.

Type.

China. Xizang: Xuegu La , alpine meadow, sandy area, 29°55' N, 90°7' E, 5300 m, 4 Aug. 2019, ZBFC-510 (holotype, KUN!; isotype, KUN!). Paratype. China. Xizang: Xuegu La , alpine gravel slopes, sandy area, 29°54' N, 90°7' E, 5407 m, 28 Aug. 2015, ZJW3454 (KUN) .

Figures

Figure 2. Images of Pulvinatusia xuegulaensis A and B fruiting plants C fruits D septum and replum E and F seeds G and H flowering plants I and J stems K leaves. Scales bars: 1 mm. - Photos: A-F & I-K by Lishen Qian G and H by Jianwen Zhang.