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Article History

Received: 9 October 2024

Accepted: 11 February 2025

First Online: 22 February 2025

Declarations

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: Experimental research and studies on plants in this study, including the collection of plant material, comply with the institutional, national, and international guidelines and legislation. Seeds of R. soongarica were collected in Laohukou, Wuwei, Gansu Province, China (102°58′ E, 38°44′ N; elevation 1315–1375 m), in late October 2019. This sampling area's average annual temperature, rainfall, and evaporation are 7.5 °C, 110 mm and 2, 646 mm, respectively. The seeds (voucher number: 063–2) were identified by Dr. X. Liu at the Institute of the Gansu Minqin National Studies Station for Desert Steppe Ecosystems (MSDSE). Seed samples were deposited at the Herbarium of the Scientific Research Experimental Station of the Longqu Seed Orchard, Gansu Province Academy of Qilian Water Resource Conservation Forests Research, in Zhangye. Plant materials were collected per the Technical Regulations for the Seed Collection of Rare and Endangered Wild Plants of the People's Republic of China (LYT2590-2016).

: Not applicable.

: The authors declare no competing interests.