XXV. PAPILIONAOE^. 101 



4 / Lips of the calyx deeply toothed I . , . . . 2. Genista. 



\ Teeth of lips very short 3. Cytisus. 



g j Keel of the corolla very pointed 6 



\ Keel of the corolla obtuse 7 



{Leaves with 1 or 3 leaflets. Flowers solitary or in racemes. Stamens mona- 

 delphous 4. Ononis. 

 Leaves linear, without leaflets. Flowers solitary or in racemes. Stamens 

 diadelphous 17. Lathyrus. 

 Leaves with a pair of leaflets at the base of the stalk besides the 3 at the 

 top. Flowers in umbels. Stamens diadelphous .... 9. Lotus. 



7 ( Shrubs or undershrubs. Stamens monadelphous . . . .2. Genista. 

 \ Herbs. Stamens diadelphous 8 



8 / Leaves simple or reduced to a tendril 17. Lathyrus. 



\ Leaves with 3 leaflets . 9 



q j Pod much curved or spirally twisted. Flowers in short racemes 5. Medicago. 



( Pod straight or nearly so 10 



10 / Flowers in long racemes 6. Melilotus. 



X Flowers in heads or short racemes . 11 



y. j Pod several-seeded, much longer than the calyx . . . .7. Trigonella. 



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

 12 j Flowers in umbels or globular heads 13 



( Flowers in spikes or racemes, or solitary 17 



iq / Umbels with a leaf at the top of the peduncle immediately under the flowers 14 



16 \ Umbels leafless 16 



14 r Calyx inflated, enclosing the pod 10. Anthyllis. 



X Calyx not inflated, shorter than the pod 15 



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



X Leaflets many. Keel obtuse. Pod jointed 13. Ornithopus. 



lfi /Keel very pointed . . . 14. Hippocrepis. 



\ Keel small, obtuse. Flowers minute 13. Ornithopus. 



C Common stalk of all the leaves ending in a terminal leaflet. Stipules not 

 yj) sagittate 18 



j Common stalk of the leaves, at least some of them, ending in a tendril or fine 



V point. Stipules sagittate, or half-sagittate ....... 20 



1S / Pod short, flat, with 1 seed 15. Onobrychis. 



X Pod turgid, or elongated, with several seeds 19 



1Q /Keel with a short, distinct point 12. Oxytropis. 



iy \ Keel obtuse, without any point 11. Astragalus. 



f Style filiform or angular, hairy on the outer side or all round. Leaflets small 

 2ft | and numerous (except in V. Mthynica) 16. Vicia. 



j Style flattened, hairy on the inner side only. Leaflets usually few, and 



V. rather large 17. Lathyrus. 



Among the very numerous Peaflowers cultivated in our gardens, and 

 belonging to genera entirely exotic, the most common are, amongst trees, 

 — two species of Laburnum, the Robinias (commonly called Acacias, but 

 not the Acacias of botanists) ; among shrubs, — the bladder Senna (Colutea 

 arborescens), the Spanish Broom (Spartium junceum), several species of 

 Caragana, Coronilla, &c. ; in flower gardens, — several Lupines, the 

 French Honeysuckle {Hedysarum coronarium), &c. ; and in kitchen- 

 gardens, — the French Bean (Phaseolus vulgaris), the Scarlet runner 

 [Phaseolus coccineus), &c. ; whilst the Australian Chorozemas, Kennedy as 

 and others, the New Zealand Edwardsias and Clianthus, the East Indian 

 Piptanthus, Indigos, &c, the Chinese Millettia {Wistaria or Glycine of 

 gardeners), and many others, from various parts of the world, are con 

 spicuous in our plant-houses or on garden-walls. 



I. ULEX. FUKZE. 



Much branched, very thorny, green shrubs, with simple, prickle- 

 shaped leaves, and yellow flowers. Calyx coloured like the petals, 

 divided nearly to the base into two concave segments or lips, which 



