Flemingia grahamiana Wight & Arn. (1834: 242)

Do, Truong Van & Gao, Xin-Fen, 2020, Taxonomic revision of the genus Flemingia (Leguminosae) from Indo-Chinese floristic region, Phytotaxa 429 (1), pp. 1-38 : 28-29

16. Flemingia grahamiana Wight & Arn. (1834: 242) . Type:— INDIA. R.Wight 816 (Holotype, CAL-0000012298!; isotype, E-00157783!)

Flemingia pycnantha Benth. (1851: 643) . Type :— INDIA. Hohenacker 1211 (Holotype, G-00365319!; isotype, G-00365323!).

Flemingia sericans Kruz (1874: 186) . Type:— MYANMAR. Unknown.

Shrubs, erect, usually many branched. Branchlets subterete, obviously lenticellate, younger parts densely tomentose. Petiole 1.2–3 cm long, densely tomentose, not winged; petiolules 1–3 mm long. Stipules lanceolate or elliptic-lanceolate, 0.8–1.1 cm long, pubescent, persistent or caducous. Leaves digitately 3-foliolate, leaflets papery, terminal leaflet elliptic or elliptic-lanceolate, 3–6 cm long, 2–3 cm wide, base cuneate, apex acuminate, acute, or sometimes obtuse with slender mucro; lateral leaflets smaller, obliquely lanceolate to obliquely elliptic, base obliquely rounded, apex obtuse or acuminate; adaxially glabrous, abaxially densely pubescent with orange, sessile glands, basal veins 3, reaching upwards to three-four of the length of the lamina, lateral veins pinnate, 4–5 pairs, veins flat or sometimes slightly concave on adaxial surface, distinct and prominent on abaxial surface. Inflorescence racemose, axillary, simple or branched; inflorescence axis 2.5–5 cm long, densely gray villous; bracts narrowly lanceolate, 9–10 mm long, usually rigid, imbricate, subpersistent. Flowers 0.8–1 cm long, clustered; pedicel 1.5–2 mm long. Calyx tube 3–4 mm long, lobes linear-setaceous, sub-equal, plumose, 6–7 mm long, covered densely with red sessile glands. Corolla white, equal to the calyx or shorter; standard oblong, 8–10 mm long, base with claw and auricles; wings narrow, long and curved, slightly shorter than standard, slenderly clawed, auriculate; keel falcate, clawed, apex obtuse. Pods oblong to elliptic, 9–10 mm long, 5–6 mm diam., sparsely pubescent and covered with viscous red glands, apex oblique, with small acute mucro. Seeds 1 or 2, black, suborbicular, ca. 2 mm in diam.

Iconography citation: — Nguyen (1979: 145): plate 23, figures 4–5; Pham (1999: 968), figure 3879.

Ecology and phenology: — Flemingia grahamiana grows in pine-oak forests and mountain slopes, elev. 900– 2300 m. Flowering from January to April; fruiting from February to September.

Distribution: — China, Myanmar, Laos and Vietnam.

Notes: — F. grahamiana is most similar to F. latifolia by sharing an elliptic to lanceolate bract, but clearly differs from the latter by the morphological characters of branchlets (without lenticels vs. obvious lenticels), indumentum on branches, petiole, and abaxial leaf surface (densely brown tomentose vs. densely pubescent pubescent), inflorescence (congested racemes vs. lax racemes), bract apex (acuminate vs. obtuse), and corolla (included in calyx vs. much longer than calyx). F. grahamiana also resembles F. macrophylla by sharing a congested racemes and elliptic-lanceolate leaflet blade, but easily distinguished from the latter by the morphological characters of bract (elliptic to lanceolate vas. ovate to triangular), calyx loobes (linear, longer than tube vs. lanceolate, as long as tube), and corolla (included in calyx vs. much longer than calyx).

Representative specimens: — LAOS. Louang Prabang: Spire 1560 (P). Xieng Khouang: Delacour s.n. (P) . VIETNAM. Kon Tum: Dak Gau , elev. 700 m, Schmid 117 (P, AAU). Lam Dong: Da Lat, Evrard 1910 (P) ; elev. 1500 m, 27 November 1982, LX-VN000922 (HN); Dang Khoi 108 (HN-0000027798) ; Do 88 (HN-0000027778) ; Dilinh , elev. 1000-1100 m, 13 January 1935, M.E.Poilane 23884 (AAU) ; Blao , elev. 850 m, 18 January 1954, Schmid s.n. (P) . MYANMAR. West Central Burma: Southern Chin Hills , Mt. Victoria region , Mindat , elev. 4600f, 6 March 1956, Kingdon Ward Exped. 37a (AAU) . THAILAND. Lamphun: Mae Tah, Doi Kuhn Dahn National Park, elev. 525 m, 27 December 1994, J.F.Maxwell 1309 (BKF). Sukothai: Kimirat , Kao Luang Summit , elev. 1200 m, 29 January 1995, J.F.Maxwell 43 (BKF) . CHINA. Yunnan: Hequing, Dapingzi , March 1884, J.M.Delaway 516 (KUN-1208448) ; 11 February 1889, J.M.Delaway s.n. (KUN-1206526); 1888, J.M.Delaway s.n. (KUN-1230068); elev. 1550 m, 20 February 1934, X.T.Cai 56996 (KUN-0611905); Huang Ping , 9 February 1990, X.F.Gao 437 (KUN-0611919) ; Puer, Dehua , 28 January 1991, G.D.Tao 44246 (HITBC-019257) ; Lancang Lahu, Yakou , 20 May 1965, L 2065 (PE) ; Shuangbai , elev. 1400 m, 29 March 1957, W.Q.Yin 400 (PE). Sichuan, elev. 1120 m, H.Zhu et al. 525 (CDBI-0058753) .