148 KEY TO SUB-CLASSES, ORDERS AND GENERA. 
XLIII—LEGU MINOS A —cont. 
A—PAPILLONEZ—cont. 
(tt) Anthers dimorphous; leaves 3-foliate, leaflets lanceo- 
late:— . 506 ... ecexcevi—Stylosanthes. 
(**) Stamens diadelphous, Gi 
(+) Leaves simple, stipules spinescent ; pod 9-jointed, hardly 
separating :— ... ecxey—Alhagi, 
(Tt) Leaves in parpinnate, stipules not spinescent, pod 1—-3- 
jointed :— .. cexevi (bis. —Hedysarum. 
(***) Stamens in 2 bundles of 5 each ; ; leaves pinnate ; joints of 
pod papillose or weakly muricate :— 
(+) Leaves paripinnate, end leaflet replaced by a bristle; pod 
folded up within the calyx :— sc .. cexevii—Smithia, 
(tt) Leaves imparipinnate ; pod straight exserted :— 
(§) Leaflets linear, numerous, 20—50 pairs, stiples and bracts 
decidous ; marsh plants :— ... cexcvii—Aischynomene, 
(§§) Leaflets roundish-oblong, few, 4--8 pairs, stipules and 
bracts persistent and striated ; dry land and hillock 
plants :— ... ¢exeix—Ormocarpum,. 
(8) Leaflets pinpellates stamens diadelphous (9 + 1); ovary 2-or 
moré-ovuled ; joints of pod usually about as long as broad :— 
(*) Pod folded up within calyx :— sles vl we. ceecii—Uraria, 
(**) Pod straight, exserted :— 
(+) Joints of pod wing-like, thin and large; flowers in 
fascicles from the old wood ; anthers dimorphous ; large 
trees :— Lo, ceciii—-Ougeinia, 
(t+) Joints of pod ‘not wing-like ; flowers from the year’s 
shoots ; anthers uniform ; mostly shrabs :— 
cceciv—Desmodinin, 
(b) Pod not segmented :— 
(a) Shrubs; leaves always 3-foliate; pod flattened, much longer 
than calyx ; stamens diadelphous, anthers uniform : = 
(*) Leaflets toothed ; pod spirally twisted :— cclaxxiti—Medicago. 
(**) Leaflets entire; pod straight :— 3 ... ecci-—Pseudarthria. 
(8) Trees or strong woody climbers ; leaves imparipinnate (rarely 3- 
foliate) ; stamens usually submonadelphous, the vexillary 
stamen ‘united in the middle of the sheath, sometimes diadel- 
phous (9+1) (rarely in Dalhergia in 2 bundles of 5+5) :— 
(*) Leaflets opposite :— 
(+) Pod wingless, w tek flattened, oblong with discurved 
oint :— ... e@cexxvi—Pongamia, 
(7t) Pod winged on upper, or both, “satures ; usually strap- 
shaped :— : 5 mes oc we = CCCXxvii— Derris. 
(**) Leaflets alternate :— 
(+) Flowers small, pinkish ; pods narrow, not winged :— 
cecxxiv—Dalber gia. 
(tt) Flowers small, pinkish; pods suborbicular oblique, winged 
all rotnd :— Sho eee — Pterocarpus, 
(C) Leaves opposite, pinnate ; pod strap-shaped, not winged :— 
eccxxvili—PJatymischinm, 
B—CABSALPINIED. 
[Anatomical featwres.—Most trees of this suborder have distinct dark-coloured heart- 
wood, the chief exceptions being the arborescent Bawhinias (climbing Bauhinias 
have an anomalous structure). Some genera (Hardwickia, Rymenea) have cavities in® 
the wood filled with gum-resin, the walls lined by a str atum of thin walled cells, ] 
[Botanical Note—Hooker places genus ccelxvi— Acrocarpus in the suborder 
MimosE#, Brandis and Prain show it to belong to this suborder. | 
(I) Leaves bipinnate, often with hooked prickles :— 
(i) Calyx 5-cleft to base or nearly so, segments imbricate ; stamens 10:— 
(1) Pod not winged, sometimes echinate; trees, shrubs ‘and climbers :— 
eccexxxviii—Csalpinia, 
(2) Pod winged on both sutures ; tree :—- ... ccecexxxix—Peltophorum, 
