96 
LEGUMINOSAE 
Leaves unequally pinnate, that is the rachis ending in 
a leaflet; leaflets many; flowers in racemes, 
spikes or heads. 
Herbs; pods often inflated ; stipels none... 
11. Astragalus. 
Trees; pods flat, never inflated; leaflets with stipels. 
10. Robinia. 
Leaves equally pinnate, the rachis ending in a tendril 
or point; herbs. 
Lobes of the calyx foliaceous; style hairy down the 
inner side .15. Pisum. 
Lobes of the calyx not leafy. 
Style hairy down the upper side. 
14. Lathyrus. 
Style hairy only at summit.13. Vicia. 
Leaflets 3 ; herbs. 
Leaves palniately 3-folioiate ; flowers in a head or head¬ 
like cluster ; corolla withering-persistent. 
7. Trifolium. 
Leaves pinnately 3-foliolate; flowers in racemes or 
spikes ; corolla deciduous after flowering. 
Leaflets with stipels.16. Phaseolus. 
Leaflets without stipels. 
Leaves glandular-dotted; perennial herbs. 
9. PsORALEA. 
Leaves not glandular-dotted. 
Pods small, globose ; annuals or biennials.... 
6. Melilotus. 
Pods spirally coiled or curved; annuals or 
perennial herbs.5. Medicago. 
Flowers in umbels or solitary ; leaves equally or unequally pin¬ 
nate, the leaflets 3 to many, sometimes 1 or 2 ; herbs. .. 
8. Lotus. 
Stamens distinct; flowers solitary; very spiny shrub..3. Pickeringia. 
Calyx 2-lipped. 
Flowers in racemes or spikes, mostly in whorls; leaves palmate, with 
4 to many leaflets.4. Lupinus. 
Flowers in axillary heads or spikes ; leaves pinnate with 4 leaflets. 
12. Arachis. 
1. ACACIA Willd. 
Trees or shrubs with leaves bipinnate or reduced to phyllodia. Flowers 
yellow or straw-color, in spikes, heads, solitary or in clusters. Corolla 
regular. Stamens separate, numerous. Pod various. (The ancient 
Greek name.) 
Leaves reduced to phyllodia. 
Flowers in globular heads. 
Veins of phyllodia 1 .1. A . armata. 
Veins of phyllodia more than 2.2 A. melanoxylon. 
Flowers in spikes; phyllodia whorled.3. A. verticillata. 
Leaves all bipinnaje. 
Pinnae few, 2 to 3 pairs....4. A. baileyana. 
Pinnae many, 8 to 15 pairs.5. A. decurrens. 
1. A. armata R. Br. Kangaroo Thorn. Spreading shrub 2 to 3 m. 
high; phyllodia half-ovate, nerve ending in a point; pods hairy, straight 
or slightly curled.—Cult, from Austr. 
2. A. melanoxylonR. Br. Australian Blackwood. Tree; phyllodia 
oblanceolate to lanceolate, 6 to 10.8 cm. long, with 3 to 6 parallel nerves; 
flowers in short racemes of 3 to 5 heads; pods reddish-brown, twisted, 7.2 
