FLORA OF VIETNAM
Primulaceae
Primula urceolata C.M. Hu ex Aver.**, sp. nov.

Ha Giang prov., Quan Ba distr., Cao Ma Po commune, Chin Chu Lin village, around point 23°04ʹ47.2ʺN 104°48ʹ55.6ʺE, steep slopes and flattened top of mountain composed with sandstone at elevation 1800–1950 m a.s.l. Primary evergreen broad-leaved very humid forest. Lithophytic rosulate herb on mossy rocks. Rare. 21 October 2018, L. Averyanov, Nguyen Sinh Khang, T. Maisak, Truong Duc Thieu, VR 1133 (holotype – LE01055333, isotype – HN).
Species close to P. barbicalyx Wright. (P. sect. Obconicolisteri Balf.f.), but differs in densely pilose leaves on both sides and urceolate calyx (vs. leaves sparsely pilose along veims or glabrescent, calyx broadly campanulate).