Abstract
Hemiboeaalbiflora X.G.Xiang, Z.Y.Guo & Z.W.Wu, sp. nov., a new species of Gesneriaceae from Guizhou, China, is described and illustrated. This species was previously listed informally as a variety of H.gamosepala, but it differs significantly from H.gamosepala by its 5-parted calyx from the base, longer peduncle, white corolla and longer pistil. Based on recent extensive observations, this new species is similar to H.cavalerieivar.paucinervis and H.subcapitata but differs from them by its longer petiole, larger involucre, white corolla and longer staminal filaments. The conservation status of this species is considered to be “Vulnerable” (VU) according to the IUCN Red List Categories and Criteria.
Highlights
After consulting Hemiboea specimens deposited in PE, KUN, IBK and QNUN and relevant literature (Li 1987; Wang 1983; Li and Wang 2004; Wei 2010), we concluded that it is a distinct species and we describe it as Hemiboea albiflora
Stamens 2, anthers fused by adaxial surfaces, adnate to 0.8–1 cm above the corolla base; filaments linear, glabrous, geniculate from the middle, 1.8–2 cm long, about 1 mm wide; anthers ovate-elliptic, glabrous, ca. 2–3 mm long, 2 mm wide, coherent at apex
Hemiboea albiflora is known from Maling River Valley and Pogang Nature Reserve, Xingyi City, Guizhou, China, growing on rock faces near Maling River and near streams in Pogang Nature Reserve, at an elevation of ca. 720–970 m
Summary
During our expedition to Xingyi City, Guizhou Province, China in 2017, we collected two populations of Hemiboea gamosepala var. Guizhou: Xingyi City, Maling River Valley, 26°8.47'N, 104°57.27'E, altitude 967 m, on rock faces near the river, 12 October 2017, X.G. Xiang, Z.W. Wu & Z.Y. Guo 2017061 (holotype: PE!; isotypes: PE!, QNUN!). H. albiflora differs significantly from H. gamosepala by its 5-parted calyx from the base (vs 5-lobed from middle), longer peduncle, 3–6 cm (vs 0.2–0.4 cm), white corolla (vs pink corolla) and longer pistil, 2–2.5 cm (vs ~ 1.5 cm).
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