PAPILIONACE^]. 181 



others ; and the Mimosa tribe, to which belong the Sensitive-plant 

 (Mimosa pudica), the Calliandras, and the numerous Australian Acacias 

 of our plant-houses. The Leguminosce thus form, after the Composites, 

 the most extensive of all the Natural Orders of flowering plants. 



, f Leaves simple, or with 3 leaflets 2 



I Leaves pinnate, with 2, 4, or more leaflets 12 



r Calyx distinctly divided into two lips, either entire, or the upper one 2- 



2 < toothed and the lower one 3-toothed 3 



L Calyx with 5 distinct teeth, not arranged in two lips 5 



o J Calyx yellow, nearly as long as the petals, deeply divided into two 1. Furze. 



I Calyx short, not divided below the middle 4 



. J Lips of the calyx deeply toothed 2. Genista. 



I Teeth of the lips Yerj short 3. Broom. 



- f Keel of the corolla very pointed 6 



I Keel of the corolla obtuse . . . 7 



f Leaves simple, or with 3 leaflets. Flowers solitary or in racemes. Sta- 



fi j mens monadelphous 4. Ononis. 



I Leaves with a pair of leaflets at the base of the stalk besides the three 

 ^ at the top. Flowers in umbels. Stamens diadelphous . 9. Lotus. 

 ,_ f Shrubs or undershrubs. Stamens monadelphous ... 2. Genista. 



I Herbs. Stamens diadelphous 8 



R f Leaves simple, or reduced to a tendril 19. Pea. 



I Leaves with 3 leaflets 9 



q f Pod much curved or spirally twisted. Flowers in short racemes 5. Medice. 



I Pod straight or nearly so 10 



,J" Flowers in long racemes 6. Melilot. 



1 Flowers hi heads or short racemes 11 



,, f Pod several-seeded, much longer than the calyx .... 7. Trigone!. 

 I Pod 1- to 4-seeded, seldom exceeding the calyx .... 8. Clover. 



, 2 [ Flowers in umbels or globular heads 13 



I Flowers in spikes or racemes, or solitary 17 



r Umbels with a leaf at the top of the peduncle immediately under the 



13 1 flowers 14 



I Umbels leafless .16 



, . J Calyx inflated, enclosing the pod ....... 10. Anthyllis. 



I Calyx not inflated, shorter than the pod 15 



Leaflets 5. Keel pointed or beaked. Pod not jointed ... 9. Lotus. 

 Leaflets many. Keel obtuse. Pod jointed . . . .14. Bird's-foot. 



lfi i Keel very pointed 15. Hippocrepis. 



C Keel small, obtuse. Flowers minute 13. Arthrolobe. 



r Common stalk of all the leaves ending in a terminal leaflet. Stipides 



27 I not sagittate 18 



i Common stalk of the leaves, at least of some of them, ending in a 



^ tendril or fine point. Stipules sagittate, or half-sagittate 20 



18 f Pod short, flat with one seed 16. Sainfoin. 



1 Pod turgid, or elongated, with several seeds 19 



.{ 



