Paraphlomis hsiwenii Y.P.Chen & XiongLi, 2022

Chen, Ya-Ping, Xiao, Jin-Fei, Xiang, Chun-Lei & Li, Xiong, 2022, Paraphlomis hsiwenii (Lamiaceae), a new species from the limestone area of Guangxi, China, PhytoKeys 212, pp. 85-96 : 85

Paraphlomis hsiwenii Y.P.Chen & XiongLi sp. nov.

Figs 3 , 4

Type.

China, Guangxi, Jingxi City, Nanpo Town, Longting , Diding Natural Reserve , among shrubs in forests of limestone area, 23°3'29.55"N, 105°57'13.82"E, alt. 1181 m, 25 Jun 2022, J.F. Xiao & X.L. Ma XJF095 (holotype: KUN!; isotypes: K!, KUN!, MO!, PE!) .

Diagnosis.

Paraphlomis hsiwenii is morphologically most similar to P. pagantha , but differs in having laminas glabrous above (vs. sparsely strigose above), bases of laminas not decurrent (vs. decurrent), calyces ca. 6 mm long (vs. ca. 4 mm long) with teeth ca. 2 mm long (vs. ca. 1 mm long), and upper corolla lips emarginate at apex (vs. entire at apex).

Perennial herbs 50-120 cm tall, stoloniferous. Stems erect, simple or branched, obtusely 4-angled, densely retrorse hispidulous and glandular. Leaves opposite; lamina ovate, papery, 3-11 × 2.5-5 cm, apex acute to acuminate, margin serrate, base cuneate to broadly cuneate, adaxially green, glabrous, abaxially light green, purplish-green, or purple, densely glandular, lateral veins 3-5-paired; petioles 0.5-2 cm long, densely retrorse hispidulous and glandular. Verticillasters 2-14-flowered; bracteoles subulate, ca. 0.5 mm long, early deciduous; pedicels 2-3 mm long, densely retrorse hispidulous and glandular. Calyx green to yellowish-green, campanulate, ca. 6 mm long, densely hispidulous and glandular outside; teeth 5, subequal, triangular, reflexed, ca. 2 mm long, sparsely hispidulous inside, apex acute. Corolla ca. 1.4 cm long; tube ca. 6 mm long, ca. 1.5 mm wide, purplish-red at upper part; 2-lipped, upper lip oblong, yellowish-green, erect, concave, ca. 8 mm long, ca. 6 mm wide, sparsely pubescent outside, apex emarginate, lower lip ca. 8 mm long, ca. 1 cm wide, sparsely pubescent outside, 3-lobed, medium lob largest, white, dotted with purplish-red spots, subcircular, concave, apex emarginate, ca. 6 mm long, ca. 6 mm wide, lateral lobes ovate, yellowish-green, dotted with purplish-red spots, reflexed, ca. 4 mm long, ca. 2 mm wide. Stamens 4, straight, included, filaments hispid at base, anther cells 2, divergent. Style included, glabrous, apex subequally 2-lobed, lobes subulate. Ovary truncate at apex, densely hispid and glandular. Nutlets yellowish-brown, triquetrous-oblong, ca. 3.5 mm long, apex hispid and glandular.

Phenology.

Flowering from June to July, fruiting from July to August.

Distribution and habitat.

Paraphlomis hsiwenii is currently only known from Diding Natural Reserve in Guangxi, China (Fig. 5 ). It occurs in shady places in evergreen broad-leaved forests or among shrubs in limestone mountains at an altitude of ca. 1200 m.

Etymology.

The new species is named after the Chinese taxonomist Hsi-Wen Li, who passed away in 2021 and had contributed tremendously to the taxonomy of Lamiaceae from China.

Chinese name

(assigned here). xī wén jiǎ cāo sū (锡文假糙苏).

Additional specimens examined.

China. Guangxi: Jingxi City, Nanpo Town, Longdingtun , Diding Natural Reserve , alt. 1231 m, 19 Aug 2020, W.H. Wu et al. DD426 (KUN) .

Specimens of P. pagantha examined.

China. Hainan: Danzhou City, Shaposhan (Mt. Shamaoling), 29 Aug 1927, W.T. Tsang 672-16171 (IBSC0718446, IBSC0585106, PE00834801); Ledong County, Chang’e Village, Mt. Chang’eling, 16 Jun 1936, S.K. Lau 27154 (IBK00059945, IBSC0585103, KUN0274797, NAS00224460, PE00834800); Ledong County, Mt. Jianfengling, alt. 750 m, 16 Jun 1959, Z.F. Wei 122572 (IBSC0585104); Qionghai City, Huishan Natural Reserve, 21 Apr 2021, L.X. Yuan et al. s.n. (KUN); Wanning City, Xinglong Town, Langmingtian Village, Wutiaosang, 17 Jul 1935, F.C. How 73217 (IBK00059942, IBSC0585105, PE00834802); Wanning City, Xinglong Town, Mt. Niuguling, 16 Apr 1935, F.C. How 71953 (BM, IBK00059943, IBSC0585102); Wanning City, mountain behind Nanlin Nongchang, 5 May 1984, Z.X. Li et al. 1661 (IBSC0585107); Wenchang City, Tongguling Natural Reserve, 4 Aug 2021, L.X. Yuan et al. s.n. (KUN). VIETNAM. Tonkin (Hanoi): Mont. Bavi, Aug 1887, B. Balansa 2914 (Type: K000928198); Ba Vi, Son Tay, alt. 800 m, 14 Jun 1962, Ban 6893 (IBSC0616357).

Figures

Figure 3. Morphology of Paraphlomis hsiwenii from the type locality A, B habitat C-E habit F leaves G stolons. Scale bar: 5 cm (A, C photographed by Xiao-Lei Ma B, D, E photographed by Xiong Li F photographed by Ya-Ping Chen G photographed by Jin-Fei Xiao).

Figure 4. Floral traits of Paraphlomis hsiwenii. A frontal view of flowers B dorsal view of flowers C lateral view of flowers D lateral view of calyces E frontal view of calyces F dissected calyx G dissected corolla and lateral view of corolla H lateral and frontal view of ovary I lateral view of nutlet. Scale bars: 2 mm (F); 4 mm (G); 500 μm (H) (A-C, G, H photographed by Jin-Fei Xiao D-F photographed by Ya-Ping Chen I photographed by Xiong Li).

Figure 5. Distribution of Paraphlomis hsiwenii (star) and P. pagantha (circle).