Buddleja jinsixiaensis R.B.Zhu, 2014

Zhu, Renbin, Kang, Bing, Cheng, Jimin, Zhang, Baoquan & Zhao, Xinyu, 2014, Buddleja jinsixiaensis (Scrophulariaceae), a new species from Shaanxi, China, Phytotaxa 159 (4), pp. 291-294 : 291-292

publication ID

https://doi.org/ 10.11646/phytotaxa.159.4.6

persistent identifier

https://treatment.plazi.org/id/9C4E8F7F-FFF7-6833-A088-FBDD224954E3

treatment provided by

Felipe

scientific name

Buddleja jinsixiaensis R.B.Zhu
status

sp. nov.

Buddleja jinsixiaensis R.B.Zhu View in CoL , sp. nov. ( Figs. 1–2 View FIGURE 1 View FIGURE 2 )

Similar to B. delavayi , but leaf blade base rounded to obtuse, inflorescences terminal, corolla tube with long hairs inside and stamens inserted slightly below the middle of corolla tube.

Type:— China. Shannxi Provence : Shangnan County, Jinsixia Grand Canyon , Rocky slope in valley, 33°20’24”N, 110°33’5”E, 1253 m, 27 May 2013, R. B GoogleMaps . Zhu 0146 (holotype WUK!, isotypes WUK!) .

Shrub 1–1.5 m high. Bark of old branches gray, coming off in strips; young twigs subterete, stellatetomentose, soon glabrescent. Stipules reduced to a transverse line. Leaves opposite; petiole 2–6 mm; leaf blade papery, ovate to very narrowly elliptic, 6–12 × 2–4 cm, both surfaces green and glabrous; base rounded to obtuse, apex acuminate, margin serrate; lateral veins 6–16 per side, depressed on upper surface, conspicuous on lower surface; young leaves stellate-tomentose, soon glabrescent. Inflorescences terminal, slightly drooping, paniculate cymes 10–12 × 2–3 cm, rather lax, each cyme bearing 3–11(–17) flowers; peduncle slightly stellate-tomentose; bracts small and linear, 3–6 mm; bracteoles 2, lanceolate, ca. 1 mm. Calyx campanulate, 2–3 mm, glabrous; lobes 4, ca. 0.5 mm, apex rounded. Corolla blue-purple, corolla mouth white; tube 9–11 × 1.5–2 mm, outside glabrous, inside with long hairs except for base; lobes 4, suborbicular, ca. 3 mm, glabrous; stamens inserted slightly below the middle of corolla tube; stamens subsessile; anthers ovate, ca. 1.5 mm; ovary ovoid, ca. 1 mm, stellate-tomentose; style and stigma ca. 1.2 mm; stigma clavate. Capsule ellipsoid, 5–7 × 2–3 mm, stellate-tomentose. Seeds narrowly elliptic, ca. 2 mm, winged all around.

Phenology:—Flowering in May, fruiting in August.

Distribution and habitat:— Buddleja jinsixiaensis is known only from Jinsixia Grand Canyon (ca. 1200 m a.s.l.), China. A total of two plants only was observed. One was found in Quercus forest and the other one on a rocky slope.

Taxonomic relationships:— Buddleja jinsixiaensis is morphologically similar to B. delavayi Gagnepain (1912: 190) in having lax paniculate cymes. However, B. delavayi has leaf blade base cuneate to decurrent, inflorescences terminal and axillary, corolla tube inside with a few scattered glandular hairs, stamens inserted slightly above the middle of corolla tube ( Table 1).

Etymology: — Named after the type locality, Jinsixia Grand Canyon.

Other specimen examined (paratype):— China. Shannxi Provence : Shangnan County, Jinsixia Grand Canyon, in Quercus forest, 33°20’30”N, 110°33’6”E, 1219 m, 28 June 2013, R. B GoogleMaps . Zhu 0156 ( WUK!) .

R

Departamento de Geologia, Universidad de Chile

B

Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet

WUK

Northwestern Institute of Botany

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