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Article from Bean's Trees and Shrubs Hardy in the British Isles
'Lonicera yunnanensis' from the website Trees and Shrubs Online (treesandshrubsonline.
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A low creeper, with slender, glabrous stems. Leaves oblong or narrowly obovate, 11⁄2 to 3 in. long, about one-third as wide; glabrous above, glaucous and glabrous or slightly downy beneath, very shortly stalked. The upper pair or pairs of leaves are united into a round or oblong disk, in the axils of which the stalkless flowers are borne. Corolla yellow, 3⁄4 to 1 in. long, glabrous outside, hairy within.
Native of Yunnan; discovered by Delavay. It is allied to the American L. dioica. Probably not in cultivation.