Dumasia kurziana (Predeep & M. P. Nayar) B. Pan

Jiang, Kai-Wen, Corlett, Richard T., Tian, Bin & Pan, Bo, 2021, Taxonomic notes on the genus Dumasia (Fabaceae), Phytotaxa 522 (2), pp. 109-120 : 115

publication ID	https://doi.org/ 10.11646/phytotaxa.522.2.3
DOI	https://doi.org/10.5281/zenodo.5556229
persistent identifier	https://treatment.plazi.org/id/03D68789-DE5F-3767-FF01-FEB7FB98FDBC
treatment provided by	Plazi
scientific name	Dumasia kurziana (Predeep & M. P. Nayar) B. Pan
status

Treatment

4. Dumasia kurziana (Predeep & M. P. Nayar) B. Pan View in CoL bis, B. Tian & K. W. Jiang, comb. & stat. nov. Fig. 3 View FIGURE 3 & Fig. View FIGURE 4

4B.

Type:— MYANMAR. Pegu: Pookie Pine 7, alt. 4000‒5000 ft., S . Kurz 1699 (holotype CAL; isotype CAL). CHINA. Yunnan: Szemao, West Mount Forests , alt. 5000 ft., A . Henry 12453 & 12872 (paratypes CAL, K!) .

Basionym: — Dumasia nitida Chun ex Y. T. Wei & S. K. Lee (1985: 161) var. kurziana Predeep & M. P. Nayar (1991: 275) View in CoL .

Description: —Perennial twining herbs, 1‒ 6 m. Stem slender, terete, subglabrous or sparsely pubescent. Leaves pinnately trifoliolate; stipules small, lanceolate, 2‒3 × ca. 1 mm, striate, brownish pubescent when young, glabrescent with age; petioles glabrous or sparsely pubescent, 0.4‒5 cm; rachis 0.1‒1.2 cm; leaflets membranous to chartaceous, adaxial surface glabrous to glabrescent, abaxial surface sparsely pubescent, secondary veins 4‒6 pairs; terminal leaflet elliptic to ovate, 0.5–4.2 × 0.3–2.8 cm, apex emarginate, obtuse or acute, apiculate, base rounded or broadly cuneate; lateral ones slightly smaller and oblique; stipels setaceous, 1–2 mm; petiolules 1–3 mm, sparsely pubescent. Pseudoracemes axillary, usually longer than the petioles of their subtending leaves, 2–9 cm, single or several clustered in axil, 4–30-flowered; bracts lanceolate, 1–1.5 × 0.5 mm. Pedicel 2–3 mm, sparsely pubescent; bracteoles 2, below the calyx, ovate, 1 mm. Calyx tubular, 9 mm, obliquely truncate at the calyx mouth. Corolla yellow; standard obovate, 15–17 mm, emarginate at apex, with a basal claw 8 mm; wings oblong to oblanceolate, 14–15 × 2 mm, obtuse at apex, with a basal claw 10–13 mm; keels 14–15, lamina subtriangular. Stamens (9+1) diadelphous; 15–16 mm; anthers uniform, alternately on long and short filaments. Ovary linear, shortly stipitate, 6–6.5 mm, glabrous, 5–6-ovuled; style long, filiform, upcurved, 8.5–9 mm; stigma capitate. Pods linear to subfalcate, 2.6–5 × 0.5–0.8 cm, glabrous, beaked at apex, stipitate at base. Seeds 2–6, ellipsoid, laterally compressed, brownish black, 4.5–5 × 3.5–4 × 2.5 mm.

Distribution and habitat: — Dumasia kurziana is distributed in China (Yunnan) and Thailand, perhaps also in Myanmar. The habitat of the species is the same as D. yunnanensis .

Phenology: —Flowering from September to October; fruiting from November to December. In Thailand, the species was recorded in flower and fruit from September to February of the following year ( Meeboonya et al. 2019).

Chinese name: —The Chinese name of Dumasia kurziana is given here as DZNJ山āü, in which “DZNJ” means Southern Yunnan, as the species is distributed south of the Tanaka Line in Yunnan Province; “山āü” is the Chinese common name for the genus Dumasia .

Iconography citation: —Predeep & Nayar (1991: 277): figure 1.

Conservation status: —According to IUCN Categories (2019), Dumasia kurziana is considered as Least Concern (LC).

Notes: — Dumasia nitida var. kurziana had long been considered as a synonym of D. yunnanensis , however, the phylogenetic results of Jiang et al. (2020) showed the two taxa have independent lineages, in which D. yunnanensis is distributed in Northern Yunnan and neighboring Sichuan, while D. nitida var. kurziana is distributed in Southern Yunnan and Thailand. Therefore a new combination, D. kurziana is proposed here.

Specimens examined:— CHINA. Yunnan: Cangyuan, Banhong, Nanban Village , in broadleaf forest, alt. 1250 m, 28 th October 1989, G. D. Tao & X. W. Li 39908 (HITBC). Ching-Tung , Mao-Chia-Fen, grassy slope, alt. 1800 m, 12 th October 1939, M. K. Li 0493 (KUN, HITBC). Jingdong, Jinping, Huangcaoling , 5 th October 2020, Q. Tian et al. 3308230831 (NPH). Jinggu, Weng’an , Malutang, in forest, alt. 1900 m, 21 st November 1986, Z. H. Yang 86315 (IBSC). Lincang , slopes, in thickets, roadside, alt. 1600–2100 m, 2 nd September 1957, J. S. Xin 630 (KUN, PE). Lincang, Poshang , among thickets, alt. 2500 m, 4 th October 1938, T. T. Yü 17876 (PE). Luchun , Mayu, alt. 840–1300 m, 30 th October 1995, S. K. Wu, Y. M. Shui, Y. P. Yang, L. H. Liu, J. H. He, J. Murata, H. Nagamasu, T. Sugawara, X. Chen & N. Murakami 391 & 805 (KUN). ibid., alt. 840–1300 m, 31 st October 1995, S. K. Wu, Y. M. Shui, Y. P. Yang, L. H. Liu, J. H. He, J. Murata, H. Nagamasu, T. Sugawara, X. Chen & N. Murakami 2143 (KUN). Shiping , Longwu, on ravine, alt. 1900 m, 15 th September 2011, J. W. Li 1051 (HITBC). Shiping , 5 th October 2020, X. W. Sun SunXW002 (NPH). Shuangjiang, Erqu , Mingkubaka, sparse forest, roadside, alt. 1800 m, 3 rd October 1957, J. S. Xin 1212 (KUN, PE). Tonghai, Lishan , Xiangping , in the secondary forest, alt. 1900 m, 13 th August 1989, Yuxi Exped. 0808 (KUN). Xishuangbanna , Mengla County, Yaoqu , under forest, moist places, November 1982, Exped. 34241 (HITBC). Xishuangbanna , Menghun , waterside, moist places, alt. 1300 m, 18 th November 1955, P. I. Mao 7401 (PE). Xishuangbanna , Menghai County, Nannuo, tea plantation, in sparse forest, moist places, alt. 1360 m, 5 th November 1955, P. I. Mao 7078 (KUN, PE). Yuanjiang, Erqu, Yangmanlai , slopes, in thickets, moist places, alt. 800 m, 21 st October 1964, Y. H. Li 5670 (HITBC). Yuanjiang , Nanxi Laolin, hill slopes in the valley, sparse forest, moist places, alt. 1850 m, 3 rd November 1964, Y. H. Li 5840 (HITBC). THAILAND. Northern: Chengmai, 12 th December 1904, C. C. Hosseus 205 (BM). Chiang Mai, Doi Inthanon , common on hill in evergreen forest, 22 nd November 1964, K. Bunchuai 36913 (K). Chiang Mai, Doi Chiang Dao , not common in evergreen forest, 18 th November 1963, K. Bunchuai 1338 (K). Doi Angka , alt. 1630–1700 m, 2 nd January 1927, H. B. G. Garrett 365 (K). Doi Nang Ka, 1 st November 1930, A. F. G. Kerr 3290 (BM). Doi Nang Ka, Chiangmai, 1 st November 1930, Pui 3290 (K). Payap , Doi (mt) Buak Ha, W. of Chiengmai, open, grassy vegetation along roadside, alt. ca. 1575 m, 30 th November 1965, E. Hennipman 3178 (K). Eastern: Nakhon, Ratchasima, Khao Yai National Park , Khao Kieo, evergreen forest, alt. ca. 1200 m, 18 th October 1969, C. F. van Beusekom & C. Charoenpol s. n. (K) .