Yua C.L. Li, (1990: 12)

Dang, Viet Cuong, Lu, Limin, Nguyen, Van Hieu, Habib, Sadaf, Barrett, Russell L. & Chen, Zhiduan, 2016, A new record of the genus Yua (Vitaceae) from Vietnam, Phytotaxa 255 (3), pp. 274-280 : 277-279

Yua C.L. Li, (1990: 12) . Type:— Yua thomsonii (M.A. Lawson) C.L. Li

Lianas, woody, hermaphroditic, with lenticels and white pith. Stems terete to slightly ridged, tendrils 2-branched. Leaves palmately pentafoliolate. Inflorescence a compound dichasium, leaf-opposed. Flowers 5-merous; calyx cupular, entire; petals coherent in bud, opening at anthesis and falling off separately; stamens usually 5; disk inconspicuous; style conspicuous; stigma inconspicuously enlarged. Berries spherical, sweet and sour in taste. Seeds flat, pyriform, base rostrate, apex retuse, ventral infolds furrowed upward 2/3 from base; cross-section of endosperm M-shaped.

Yua austro-orientalis (F.P. Metcalf) C.L. Li (1990: 7) . Parthenocissus austro-orientalis F.P. Metcalf (1948: 132 , Fig. 1 ). Type:— CHINA, Guangdong, Lung T’au Shan, Iu, 5 June 1924, To & Tsang 12378 (holotype A! (barcode A00051628)).

Deciduous woody climbers. Stems terete, branchlets brownish or gray-brownish, with many lenticels, glabrous; tendrils bifurcate, without adhesive discs. Leaves compound, palmately 5-foliolate; petiole 3–5 cm long; leaflets subleathery, terminal petiolules 0.2–1 cm, glabrous, longer than lateral ones; terminal leaflet obovate-lanceolate or obovate-elliptic, 4.5–9 × 2–5 cm, glabrous, abaxially usually glaucous, base cuneate, margin 2–5-toothed on each side, rarely teeth inconspicuous, apex acute, shortly acuminate, or obtuse; petiolule of lateral leaflet inconspicuous, lateral leaflet blade obovate-elliptic, 2–5 × 1.5–2 cm, base narrow cuneate, margin and apex as terminal leaflet; veinlets conspicuously raised when dry, lateral veins 6–9 pairs. Inflorescences a compound dichasium, leaf-opposed; peduncles 1.5–2 cm. Flowers bud elliptic, 2–3.5 mm; pedicels 3–6 mm; calyx cupular, entire or wavy at the margin; petals 5, ca. 3 mm long, filaments 3–3.8 mm, anthers yellow, elliptic, ca. 2 mm long; pistil 2–2.5 mm long, style attenuate. Berries 1.5–2.5 cm in diam., amaranthine, sweet and sour in taste, 1–4 seeded. Seeds slightly flattened, 6–8 × ca. 5 mm, rugose.

Distribution:— China and Vietnam.

Distribution in Vietnam:— Lao Cai, Sapa. The voucher specimens have been incorporated into the Herbarium of the Institute of Botany (PE), Chinese Academy of Sciences, Beijing, China.

Ecology:—Forests or shrublands in valleys; 100–900 m.

Phenology:—Flowering in May–July; fruiting in October–December.

Specimens examined:— VIETNAM. Lao Cai: Sapa , 4 August 2013, Z.D. Chen, L.M. Lu & J.B. Zhang VN0150 (PE). CHINA. Guangxi: 25 June 1956, C.S. Qing 9528 fr. (PE, IBK) ; 20 September 2000, Q.Z. Li 370 fr. (IBK); 28 June 2008, Z.L. Zhong 1655 (IBK); 14 August 2008, Z.L. Zhong 3178 (IBK); 4 July 2011, LZ397 fr. (IBK); 18 October 2011, D3277 fr. (IBK); 1 September 1930, X. P. Gao 50800 (PE, IBK) ; 25 May 1932, W.T. Tsang 20560 fr. (PE); 30 June 1957, C. Huang 163075 fl. (KUN); 14 October 1958, P.X. Tan 59851 fr. (PE, IBK) ; 27 July 1959, P.C. Zhou 10482 (PE) ; Hunan: 1 September 1958, Y.K. Li 401307 (IBK) ; Fujian: 20 October 1932, Y. Ling 4204 (PE) ; Jiangxi: 28 September 1954, Jiangxi expedition 1631 (PE) ; 28 June 1970, W.Z. Ren 1108 (PE).

Typification :— Metcalf (1948: 132, 134) cited ‘ Kwangtung : Lung T’au Shan, Iu Village, LU 12378* (To & Tsang), type, May 27, 1924, in forested ravine, vine, 15 m. “Pui-tai-t’ang; Kat-ts’ing-t’ang; and Sai-me-tai-t’ang” (CCC)’. This is a clear designation of a single type specimen. ‘CCC’ appears to represent the ‘Chinese Cultural Collection’, with the cited specimen held at A. The collection W.T. Tsang 20560 (PE, 2 sheets) labeled ‘paratypus’ is original material, but not type material .

Yua thomsonii (M.A. Lawson) C.L. Li (1990: 2) . Vitis thomsonii M.A. Lawson in Hook. f. (1875: 657–658, as Thomsoni ). Parthenocissus thomsonii (M.A. Lawson) Planch. in DC. (1887: 453). Cissus thomsonii (M.A. Lawson) Planch. in DC. (1887: 565). Cayratia thomsonii (M.A. Lawson) E. Reid & M. Chandler (1933: 388) . Psedera thomsonii (M.A. Lawson) Stuntz in Taylor (1915: 35). Type citation:—‘Khasia Mts., alt. 4–6000 ft., H. f. & T.’ in M.A. Lawson (1875: 658).

Type:— INDIA, Assam Nunklow, Khasia , alt. 4–6000 ft., 10 July 1850, J.D. Hooker & T. Thomson 1585 (Lectotype (designated here) K! (barcode K000736314); isolectotype K! (barcode K000736313)) .

Residual Syntypes:— Assam Boga Panee, Khasia, 4–6000 feet, 29 June 1850, J.D. Hooker & T. Thomson 1371 syntype K! (barcode K000736311). Assam [Nunklow], Assam Khasia, Sikkim, 4–6000 ft., 29 July 1850, J.D. Hooker & T. Thomson s.n. (syntypes GH! (barcode GH-HUH 00051639), K! (barcode K000736312), K! (barcode K000736315), P! (barcode P 00697602)).

Yua thomsonii (M.A. Lawson) C.L. Li var. glaucescens (Diels & Gilg) C.L. Li (1990: 6) . Parthenocissus henryana (Hemsl.) Graebn. ex Diels & Gilg var. glaucesens Diels & Gilg ( Gilg & Diels 1901: 464). Type:—Szechuan, Bock & Rosthorn 226 (holotype?B,?destroyed, photo at A, n.v.; isotype O, n.v.).

Yua chinensis C.L. Li (1996: 47) . Type:— Sichuan, Qingcheng, alt. 1000 m, 13 June 1963, X.Q. Li 177 (holotype CDBI! (barcode CDBI0172485)).

Specimens examined:— CHINA. Anhui: 23 June 1959, 2369 fr. (PE) ; Chongqing: 21 June 1956, Chuanqian expedition 712 fr. (PE) ; 18 July 1959, P.Y. Li 6558 fl. (PE) ; 9 July 1964, K.J. Guan, J.W. Wang & C.L. Li 1284 (PE); 11 July 1964, H.F. Zhou & H.Y. Su 109348 (PE); 22 June 1988, F.D. Pu & Y.L. Cao 0093 fl. (PE); Gansu: 6 June 2006, S.J. Bai 1237 (PE) ; Guangxi: 9 June 1928, R.C. Qin 5886 (PE) ; 11 July 1937, X.Q. Liu 28584 (PE); 17 August 1953, Guangxi expedition 3399 fl. (PE) ; 20 June 1955, Guangxi expedition 414 fr. (PE) ; 2 June 1957, Y.K. Li P01338 fl. (PE, IBK) ; 21 July 1958, Z.Z. Chen 51221 fr. (KUN, IBK); May 1981, H.N. Tan 00163 fl. (PE); 9 September 2010, LYJX0038 (IBK); 24 June 2012, Y1580 fr. (IBK); Guizhou: 27 June 1930, Y. Jiang 5414 fr. (PE) ; 7 July 1959, Libo expedition 1006 (PE, KUN); 13 July 1959, Qiannan expedition 2758 fr. (PE, KUN); 22 August 1959, Anshun expedition 937 (PE, KUN); 20 May 1960, Z.S. Zhang & Y.T. Zhang 3643 fl. (PE); 8 July 1960, Z.S. Zhang & Y.T. Zhang 6751 fl. (PE); Hunan: 07 August 1942, S.Q. Chen 2035 fl. (IBK) ; 24 July 1948, Y. Liu 00194 fr. (PE); 31 August 1953, Z. An & X. Nong 1251 fr. (PE); 12 July 1959, P.X. Tan 62461 (PE, IBK) ; 24 June 1987, P.S. Hu 632 fl. (PE) ; 18 August 2009, J.H. Fan, H.L. Li, T. Yang & L.M. Lu 090818-05 fr. (PE); Jiangxi: 8 May 1963, S.K. Lai 2043 fl. (PE, KUN) ; 24 May 1963, S.L. Liu 1410 fl. (PE); 29 August 1963, M.X. Nie 07670 fr. (PE); 14 August 1964, W.H. Wan 1809 (PE); 28 April 1970, (70)148 (PE); Hubei: 22 May 1958, W.B. Lin 221 fl. (PE) ; 30 June 1958, H.J. Li 3273 fl. (PE); 16 June 1959, Y.L. Qiao 1426 fl. (KUN); Sichuan: 22 June 1936, 6024 (PE) ; 4 August 1938, C.W. Yao 2666 fr. (PE); 12 July 1939, C.W. Yao 4126 fr. (PE); 8 July 1952, X.L. Jiang & X.S. Zhang 31564 (PE); 1954, Z. P. Song 39413 fr. (PE, KUN) ; 1955, C.J. Xie 40522 fl. (PE); 29 April 1958, 10142 fl. (PE); 27 August 1958, X.L. Jiang 11044 fr. (PE); 10 May 1959, J.M. Chuan 3067 fl. (KUN); 27 May 1959, 8848 (PE); 1 June 1959, J.Z. Chuan 0802 fl. (PE, KUN); 3 July 1959, J.Z. Chuan 3598 fl. (PE, KUN); 29 August 1959, Z.T. Guan 6646 fr. (PE); 12 August 1961, J.S. Ying 10011 (PE); 20 August 1963, K.J. Guan & W.C. Wang 1730 (PE); 2 September 1963, K.J. Guan & W.C. Wang 2193 fr. (PE); 26 July 1976, C.S. Ke & Z.B. Zu 13537 fl. (PE); 17 July 2002, T.S. Yi 2042 fr. (KUN); Yunnan: 10 August 1947, K.M. Feng 11029 fl. (PE) ; 13 June 1973, B.X. Sun 590 fl. (KUN); 17 July 1982, Qingzang expedition 7970 fl. (KUN); Zhejiang: 1927, Y.L. Keng 537 (PE) ; 17 July 1957, X.Y. He 23964 fr. (PE); 3 July 1958, 0609 (PE); 13 June 1959, S.Y. Zhang 5745 fl. (PE, KUN); 28 July 1959, S.Y. Zhang 6025 fr. (PE, KUN).

Typification:—The diagnostic characteristics for the genus (two-branched tendrils and leaf-opposed inflorescence forming a compound dichasium) are only both present on the sheet selected as lectotype of Y. thomsonii . It is also one of only two sheets bearing fruit, important for recognition of the species.

Figures

FIGURE 1. Maximum likelihood tree for Vitaceae; a) A phylogram overview based on the combined chloroplast data sets (atpB–rbcL, rps16, trnC–petN, trnH–psbA, and trnL–F); b) The clade including Parthenocissus and Yua with the newly recorded species Y. austroorientalis highlighted. ML Bootstrap and Bayesian posterior probability values of major clades are indicated above branches.