Paraphlomis jinggangshanensis Boufford, W.B. Liao & W.Y. Zhao, 2022

Zhao, Wan-Yi, Zhang, Zhong, Fan, Qiang, Chen, Chun-Quan, Liao, Wen-Bo & Boufford, David E., 2022, Paraphlomis jinggangshanensis (Lamiaceae), a new species from Jiangxi, China, PhytoKeys 204, pp. 1-8 : 1

Paraphlomis jinggangshanensis Boufford, W.B. Liao & W.Y. Zhao sp. nov.

Fig. 2 井冈山假糙苏

Type.

China. Jiangxi Province, Jinggangshan City, Jinggangshan National Natural Reserve , roadsides, 26°38'N, 114°15'E, 740 m alt., 10 September 2021, Wan-Yi Zhao, Zhong-Cheng Liu,Zhong Zhang, XU-Jie Li, ZWY-2060 (holotype: SYS!; isotypes: A!, SYS!)

Diagnosis.

Paraphlomis jinggangshanensis is morphologically similar to P. intermedia , but differs by its pubescence of glandular trichomes, cordate leaf base, many-branched stems and glabrous anthers.

Description.

Herbs, perennial, 0.4-1.0 m tall. Rhizomes short (not transverse), taproot obscure; roots fibrous. Stems erect, simple or much branched above middle, 4-angled, grooved, densely covered with short glandular trichomes. Leaves opposite; petiole to 9 cm long, with dense short glandular trichomes, green or purplish green; lamina ovate to ovate-oblong, papery, 4-10.2 × 2.5-6.5 cm, base cordate, margin crenate, apex acuminate; abaxially light green, covered with glandular trichomes (more densely so on veins), with glandular spots; adaxially green, densely covered with glandular trichomes, with glandular spots; lateral veins 4 or 5 pairs. Verticillasters 10-12 flowered, globose, 2.5-3.0 cm in diam; bracteoles few, ovate-triangular, apex obtuse, ca. 1 mm long, with short glandular trichomes, deciduous; pedicels 1.0-1.5 mm long, or obsolete. Calyx green, tubular-obconical, slight curving, ca. 7 mm long, with dense glandular trichomes outside, glabrous except for glandular trichomes on teeth inside, conspicuously 5-veined; teeth 5, subequal, triangular, ca. 1 mm long, apex acute. Corolla white, 1.2-1.6 cm long, with dense glandular trichomes outside, pilose annulate in throat inside; tube 8-10 mm long, straight, slightly dilated toward throat, obvious longer than calyx tube; corolla 2-lipped, upper lip oblong, margin entire, ca. 4 mm long, ca. 2.5 mm wide; lower lip 3-lobed, 4-5 mm long, dotted with red spots inside, middle lobe ovate to suborbicular, apex obtuse or retuse, lateral lobes obliquely oblong, apex obtuse. Stamens 4, inserted above middle of corolla tube, straight, included, filaments flat, sparsely puberulent-villous; anther cells 2, divergent, ovoid, glabrous. Style filiform, included, glabrous, apex subequally 2-lobed. Ovary 4-loculed, glabrous. Nutlets 4, triquetrous-obovoid, brown at maturity, ca. 2.2 mm long, apex rounded, glabrous. (Fig. 2 )

Distribution and habitat.

Based on our field observations, Paraphlomis jinggangshanensis is located only in Xiangzhou, in the Jinggangshan National Natural Reserve, Jiangxi Province. This area has been considered to be in the subtropical monsoon climate region. Paraphlomis jinggangshanensis often occurs in evergreen broadleaved forests along roads above valleys.

Conservation status.

This species is currently known to occur only in the Jinggangshan National Natural Reserve in three populations numbering more than two thousand individuals. A road divides the distribution range of P. jinggangshanensis . Human activity (such as roadside weed removal) and exotic species have a negative effect on population regeneration. Paraphlomis jinggangshanensis is here suggested to be Near Threatened (NT) according to IUCN categories guidelines 10.1 ( IUCN Standards and Petitions Subcommittee 2022).

Phenology.

Flowering was observed from May to October, and fruiting from July to November.

Etymology.

The specific epithet " Paraphlomis jinggangshanensis " is derived from the type locality, Jinggangshan National Natural Reserve, Jiangxi Province, China.

Additional specimens examined (paratypes).

China. Jiangxi: Jinggangshan City, Jinggangshan National Natural Nature Reserve; NE of the town of Ciping ; vicinity of Xiangzhou , roadside, above valley, 26°37'49"N, 114°15'49"E, 545-575 m, 6 June 2013, David E. Boufford, Wen-Bo Liao, Bao-Huan Wu, Hui-Min Xu & Tian-Tian Yuan 43074 (A); Jinggangshan National Natural Reserve , roadsides, 26°38'N, 114°15'E, 740 m alt., 18 June 2021, Zhong Zhang Luofu-01 (A, SYS); ibid., 15 July 2021, Zhong Zhang Luofu-06 (A, SYS) .

Figures

Figure 2. Paraphlomis jinggangshanensis A habit, growing on gravelly hillside B plant, stems much branched C flowering branch D leaves with long petiole, base cordate E both surfaces of leaf blade with dense glandular trichomes F stem, petiole, and calyx tube with dense glandular trichomes G front view of corolla, lower lip dotted with purplish red spots, throat villous annulate H inner view of corolla, filaments borne in middle of corolla tube; red arrow indicates glabrous style; anthers glabrous I lateral view of flower J inflorescence K fresh nutlets (glabrous) and inner view of calyx tube (A-D by Zhong Zhang E-K by Wan-Yi Zhao).