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Rubia sylvatica (Maximowicz) Nakai
Sichuan: Maerkang (Barkam) Xian. E of the city of Maerkang on road to Li Xian, then S on a dirt road to Maomuchu Cun. Along stream and adjacent slopes with remnant forests of Picea and Betula with HippophaĆ«, Rosa, Cotoneaster and Hypericum. 31°47'57"N, 102°28'57"E; 3165 m.
In deep shade growing up through dead Picea. Corolla greenish yellow. Root material removed for Richard Laursen, Department of Chemistry, Boston University, for chemical analysis as a possible dye plant once used in Tibetan regions.
D. E. Boufford, K. Fujikawa, S. L. Kelley, R. H. Ree, B. Xu, J. W. Zhang, T. C. Zhang, W. D. Zhu
39708 15 August 2007

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