Fabaceae Tribe MILLETTIEAE in Flora of China @ efloras.org

17. Tribe MILLETTIEAE

崖豆藤族 ya dou teng zu

Authors: Zhi Wei, Dezhao Chen, Prof. Dianxiang Zhang, Hang Sun & Les Pedley

Trees, lianas, or shrubs. Stipules often caducous. Leaves pulvinate, usually imparipinnate; leaflets (1-)5-15(to over 40), usually opposite, rarely alternate; stipels present or absent. Inflorescences various, but not in elongated racemes. Flowers often in fascicles and these arranged in pseudoracemes or pseudopanicles, sometimes on leafless branches or on main trunk. Bracteoles usually present. Calyx various, truncate or with 4 or 5 short lobes. Corolla papilionaceous; standard with or without basal calluses; wings free or ± adherent to keel. Stamens 10, monadelphous or diadelphous; vexillary filament free or connate to others; anthers versatile, sometimes with trichomes. Disk generally present, tubular, surrounding stipe of ovary; ovary with 1-12 or more ovules. Legumes dehiscent or indehiscent, winged or not; valves woody or papery. Seeds variously shaped, flat or round in cross section; testa hard or woody.

About 45 genera and 900-920 species: widespread in tropical and subtropical regions of the world, poorly represented in Australia, Callerya extending into temperate parts of China, and Wisteria extending into temperate parts of E Asia and North America; 13 genera and 84 species (35 endemic, five introduced) in China.

This tribe was incorrectly named Tephrosieae in FRPS. The name Millettieae has priority.

1 Inflorescences racemes or panicles; flowers solitary in axil of a bract (2)

+ Inflorescences pseudoracemes or pseudopanicles; flowers inserted on short lateral branches of floral axis (brachyblasts), these occasionally reduced to a bract subtending 2 or 3 bracteate flowers (7)

2 (1) Inflorescences racemes (or sometimes panicles in Afgekia); bracts longer than corresponding flower buds, persistent and covering them completely until anthesis (3)

+ Inflorescences racemes or panicles; bracts occasionally as long as flower buds, not persistent or not covering them completely (4)

3 (2) Corolla standard with 2 basal curved laminar calluses; ovary with trichomes, with 2 ovules; legume inflated, tardily dehiscent with 1 or 2 seeds; valves thickly woody. 69 Afgekia

+ Corolla standard without basal calluses; ovary glabrous, with 9-12 ovules; legume linear, raised over seeds, dehiscing along adaxial suture, with 4-10 seeds; exocarp fleshy (papery when dry) and endocarp thin, leathery, lining seed cavity. 70 Sarcodum

4 (2) Trees; stipels absent; flowers 0.8-1 cm; corolla standard long ovate, length:width ratio 2-2.5; anthers dehiscing by short terminal slits; legumes dehiscent, thickly woody, not winged, with 1(or 2) seeds. 68 Antheroporum

+ Lianas or sprawling trees or shrubs; stipels present, caducous, or absent; flowers 0.8-3 cm or more; corolla standard ovate to orbicular, length:width ratio less than 2; legume tardily or not dehiscent, leathery or woody, winged or not, with 1-10 seeds (5)

5 (4) Flowers in pendent racemes; corolla standard with 2 distinct basal calluses forming a ridge on distal part of claw; legume leathery, compartmented, not winged. 75 Wisteria

+ Flowers in terminal or axillary panicles, not pendent; corolla standard either without calluses or calluses not forming a ridge on distal part of claw; legume not compartmented, winged or not (6)

6 (5) Corolla wings free from keel at least proximally; ovary sessile or stipitate; legume with 1 or 2 wings; seed hilum eccentric. 67 Aganope

+ Corolla wings often partially adnate to keel; ovary stipitate; legume not winged; seed hilum not markedly eccentric. 73 Callerya

7 (1) Leaflet secondary veins numerous, straight, closely parallel, few or not anastomosing, extending to margins; legumes not woody; shrubs or herbs with woody bases. 77 Tephrosia

+ Leaflet secondary veins relatively few, curved, usually anastomosing, not extending to margins; shrubs, trees, or lianas (8)

8 (7) Inflorescences cauliflorous on trunk or older branches or axillary on branchlets of previous year; supra-axillary buds covered by many subulate cataphylls. 71 Fordia

+ Inflorescences not on older branches, trunks, or branchlets of previous year; buds not covered by cataphylls (9)

9 (8) Flowers borne on slight protuberances of floral axis, mixed occasionally with solitary flowers (10)

+ Flowers borne on distinct projections of floral axis (brachyblasts) (11)

10 (9) Ovary with (1 or)2-10 ovules; legume dehiscent, flat, sometimes inflated but then secondary veins reaching margins, or legume velutinous. 72 Millettia

+ Ovary with 2 ovules; legume indehiscent, thick with secondary veins not reaching margins, glabrous. 74 Pongamia

11 (9) Leaves 3-foliolate, lateral leaflets markedly asymmetric; stamens diadelphous. 76 Craspedolobium

+ Leaves 7-21-foliolate, or if fewer leaflets (1-5) then lateral ones symmetric; stamens monadelphous or rarely vexillary stamen free in bud and adherent to others in mature flowers (12)

12 (11) Legume dehiscent, not winged on sutures or with 2 wings perpendicular to adaxial or both adaxial and abaxial sutures; flowers 2-5 in clusters or fascicles on knoblike brachyblasts. 72 Millettia

+ Legume indehiscent, winged on both abaxial and adaxial sutures; flowers 3-15 or more at tip of brachyblasts or scattered along them (13)

13 (12) Flowers 3-15 or more usually scattered along knoblike or slender brachyblasts; corolla standard without calluses; anthers without indumentum. 65 Derris

+ Flowers 2 or 3(-5) at tip of slender brachyblasts; corolla standard with prominent basal calluses; anthers usually with some indumentum. 66 Paraderris

List of lower taxa