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51b. Polygonum suffultum var. pergracile (Hemsley) Samuelsson in Handel-Mazzetti, Symb. Sin. 7: 176. 1929.
细穗支柱拳参 xi sui zhi zhu quan shen
Description from Flora of China
Polygonum pergracile Hemsley, J. Linn. Soc., Bot. 26: 344. 1891; Bistorta pergracilis (Hemsley) H. Gross; B. pseudosuffulta V. Petrov; B. suffulta subsp. pergracilis (Hemsley) Soják.
Inflorescence lax, slender, interrupted at base.
* Slopes, forests, forest margins, wet valleys; 1500-3600 m. Anhui, Gansu, Guizhou, ?Henan, Hubei, Shaanxi, Sichuan, Xizang, Yunnan, Zhejiang.
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