Additions to the seed plant flora in Xizang, China

doi:10.17520/biods.2022085

Abstract

Abstract:

Aims: The Himalaya contains many V-shaped valleys owing to the steep slopes, these valleys add to the flora and vegetation diversity. To better understand flora diversity and vegetation structure of the south slope of the Himalaya, especially the top five valleys (Yadong Valley, Chentang Valley, Gama Valley, Zhangmu Valley and Gyirong Valley), we conducted the investigation in the top five valleys July to August 2021.

Methods: In this study, 1,490 specimens were collected and photographed through field investigation, made into specimens, and sorted out and identified. The voucher specimens for each reported species were preserved in the Herbarium of Xishuangbanna Tropical Botanical Garden (HITBC), Chinese Academy of Sciences and Herbarium of Tibet Plateau Institute of Biology (XZ).

Results: Eight species, Marsdenia roylei, Trachycarpus takil, Sonerila khasiana, Cissampelos convolvulacea, Herminium edgeworthii, Passiflora napalensis, Hedychium ellipticumand Roscoea brandisii are reported as newly recorded species from the south slope of the Himalaya in China. One genus, Belostemma (Belostemma hirsutum) is reported as newly recorded genus in Xizang Autonomous Region.

Conclusions: The south slope of the Himalaya harbors one of richest floras in Xizang. But the floristic survey in this area is still insufficient, and should be further strengthened in the floristics and specimen collection in the future.

Key words: Gyirong Valley, Zhangmu Valley, Chentang Valley, newly recorded species, newly recorded genus

Hongbo Ding, Shishun Zhou, Jianwu Li, Jianyong Shen, Xingda Ma, Jian Huang, Yu Song, Xuemei Wen, Ming Lei, Yanli Tu, Yaowu Xing, Yunhong Tan. Additions to the seed plant flora in Xizang, China[J]. Biodiv Sci, 2022, 30(8): 22085.

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URL: https://www.biodiversity-science.net/EN/10.17520/biods.2022085

https://www.biodiversity-science.net/EN/Y2022/V30/I8/22085

Figures/Tables 4

Fig. 1 Four newly recorded species in China. A-C, Marsdenia roylei; D-F, Trachycarpus takil; G-H, Sonerila khasiana; I-K, Cissampelos convolvulacea.

Fig. 2 Three newly recorded species in China and one newly recorded genus in Xizang. A-B, Herminium edgeworthii; C-E, Passiflora napalensis; F-I, Hedychium ellipticum; J, Belostemma hirsutum.

Fig. 3 Roscoea brandisii. A, Habit; B, Ligule; C, Leaf (adaxial); D, Leaf (abaxial); E, Flower (side view); F, Fower (front view); G Whole plant; H, Single flower without bract; I, Bract; J, Single flower with bract; K, Calyx; L, Peduncle and ovary; M, Central corolla lobe; N, Lateral corolla lobes; O, Lateral staminodes; P, Labellum; Q, Pistil and stamen; R, Floral tube.

Fig. 4 Roscoea purpurea. A, Habit; B-C, Ligule; D, Root; E, Flower (side view); F, Flower (front view); G, Single flower with bract; H, Inflorescence; I, Anatomy of inflorescence; J, Bract; K, Calyx; L, Peduncle and ovary; M, Central corolla lobe; N, Lateral corolla lobes; O, Lateral staminodes; P, Labellum; Q, Pistil and stamen; R, Floral tube; S, Epigynous glands.

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