Oreocharis purpurata B. Pan, M. Q. Han & Yan Liu 2017, sp. nov.
Creators: name: Han, Meng-Qi
name: Pan, Bo
name: Zou, Ling-Li
name: Liu, Yan
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Gesneriaceae
Oreocharis
Oreocharis purpurata

description: Oreocharis purpurata B.Pan, M.Q.Han & Yan Liu, sp. nov. (Figs. 1–2).
Diagnosis: Oreocharis purpurata is similar to O. pinnatilobata (K.Y. Pan 1986: 34) Mich.Möller & A.Weber in Möller et al. (2011: 25), differing from the latter species by the forming a projection in the near middle region of abaxial corolla (vs none), throat have two ridges with glands (vs none), abaxial lip with a dark purple central stripe and a greenish-yellow spot at their base with reddish lines (vs none), and anthers are bent downward (vs upward).
Type:— CHINA. Hunan: Xinhua County, Youxi Town, Zhongru Village, 28° 05′ N, 111°23′ E, growing on moist shady hillside on limestone hills, ca. 178 m, 11 August 2015, Bo Pan & M. Q. Han HMQ859 (holotype IBK!).
Perennial herb. Leaves in basal rosette. Petiole 1–3 cm long, densely brown villous; leaf blade ovate or elliptic, 2.5– 5× 1–2 cm, adaxially pubescent, abaxially pubescent and brown villous along the veins, base cuneate, margin dentate, apex acute to obtuse; lateral veins 5–8 on each side of midrib, abaxially prominent. Peduncles 5–10 cm long, sparsely glandular-pubescent; bracts 2, lanceolate, ca. 4 mm long, villous. Pedicel 2.5–3 cm long. Calyx 5-lobed nearly to base, lobes linear-lanceolate, ca. 3 mm long, outside villous, margin entire. Corolla bilabiate, inside glabrous, outside pale purple and sparsely glandular-pubescent; tube narrowly tubular, abaxial tube near middle with a 10–15 mm long projection, slightly constricted at throat, two ridges with glands; adaxial lip ca. 5 mm long, 2-lobed nearly to the base, lobes lanceolate-ovate, 4–5 × 2–3 mm, apex acute; abaxial lip 3-lobed to middle, with a dark purple central stripe and a green-yellow spot at their base with reddish lines, lobes oblong, ca. 7 mm long, apex acute to rounded. Stamens 4, coherent, adnate above base of corolla tube, included, adaxial stamens ca. 9 mm long, abaxial stamens ca. 11 mm long; filaments glabrous; anthers reniform, downward, dosifixed, longitudinal dehiscence, black purple, coherent in two pairs; staminode 1, adnate above base of corolla tube, ca. 1.5 mm long. Disc ringlike, ca. 1 mm high, glabrous. Pistil included at beginning of flowering, ca. 6 mm long, then distinctly exserted ca. 4 mm, ca. 18 mm long, glabrous; ovary narrowly oblong, stigma 2-lobed. Capsule elliptic, 3.6–4.0 cm long.
Distribution and habitat:— Oreocharis purpurata was observed to grow on moist shady cliffs on limestone hills, at elevation ca. 200 m in Youxi town, Xinhua County and Mei River Scenic Area, Lianyuan City, Hunan Province of China.
Etymology:— The epithet refers to the corolla which is with purple stripes.
Phenology:— Flowering from September to October and fruiting from October to December.
Vernacular name:— Chinese mandarin: Zǐwén mǎ líng jù tái (ǨÊLj"ẵã).
Notes:— The new species have narrowly tubular corolla tube, the adnate of filaments in corolla tube near base and the anthers are coherent in pairs. These features indicate it belongs to the original Isometrum Craib (1919: 250). The new species develops a rare corolla structure with two glandular ridges, which is distinct from all other species of the original Isometrum and most species of the Oreocharis. The new species have nearly cylindric corolla tube and dentate leaf blade, which are similar to O. pinnatilobata. However, these two species have obvious differences in several characters and their detailed morphological comparison is provided in Table 1 and Figure 3.
description: Published as part of Han, Meng-Qi, Pan, Bo, Zou, Ling-Li & Liu, Yan, 2017, Oreocharis purpurata, a new species of Gesneriaceae from Hunan, China, pp. 183-188 in Phytotaxa 328 (2) on pages 183-187, DOI: 10.11646/phytotaxa.328.2.9, http://zenodo.org/record/13722830