90 LEGUMINOS^. 



or the upper one distinct, equal or the alternate longer ; anthers usually 

 versatile. Disk lining the base of the calyx-tube. Ovary of one 1-celled 

 carpel, included in the staminal sheath ; style incurved, stigma simple, 

 oblique or terminal; ovules 2 or more, 1-2-seriate on the ventral suture, 

 campylotropous or aiiatropous. Fruit a dry pod (legume) dehiscent along 

 one or both sutures or not at all, continuous or septate internally. Seeds 

 with a coriaceous testa, and simple or dilated funicle, albumen ; cotyle- 

 dons plano-convex, radicle incurved, incumbent. — Distrib. Chiefly N. 

 temp, but found all over the globe ; few in New Zealand ; genera 295 ; 

 species 4,700. — Affinities. Principally with Rosacea. — Properties too 

 numerous to mention here. 



The Tribal characters here given apply to British Genera to the exclusion 

 of many exotic ones. 



Series 1. Leaves 1- or 3-foliolate, without tendrils. 



Tribe I. GENISTEJE. Shrubs. Leaves or 1-foliolate or digitately 3- 

 folioiate ; leaflets quite entire. Filaments all united. Pod 2-valved. 



Calyx shortly 2-lipped, lips deeply toothed 1. Genista. 



Calyx deeply 2-lipped, coloured 2. Ulex. 



Calyx shortly 2-lipped, lips minutely toothed 3. Cytisus. 



Tribe II. TRIFO'IiIEffi. Herbs, rarely shrubs. Leaves pinnately rarely 



digitately 3-foliolate ; veins generally ending in teeth. Upper filament 



usually separate. 



Filaments all united 4. Ononis. 



Upper filament separate. 



Racemes short. Pod longer than calyx, curved, dehiscent... 5. Trigonella. 



Racemes short. Pod usually spiral 6. Medicago. 



Racemes long. Pods short, indehiscent. Keel petals free... 7. Melilotus. 



Flowers capitate. Pod short, ,1-4-seeded. Keel petals adnate. 



8. Trifolium. 



Series 2. Leaves 5- or multi-foliolate, with a terminal leafiet. 

 Tribe III. LO'TEiE. Herbs or shrubs. Upper filament separate or not ; 

 alternate filaments often dilated. Pod 2-valved, without a longitudinal 

 septum. 



Calyx inflated, including the pod 9. Anthyllis. 



Calyx not inflated, pod exserted dehiscent 10. Lotus. 



Tribe IV. GALEGE-ffi (sub-tribe Astragale'^;). Herbs or shrubs. 

 Upper filament separate. Pod 2-valved, turgid or flat, with a longitu- 

 dinal septum. 



Keel obtuse 11. Astragalus. 



Keel beaked or with an incurved tip 12. Oxytropis. 



Tribe V. HEDYSAR'Effi. Herbs or shrubs. Upper filament separate. 

 Pod indehiscent, of 1 or many 1-seeded joints. 



Pod cylindric, many-jointed 13. Ornithopus. 



Pod flat, of many curved 1-seeded joints 14. Hippocrepis. 



Pod flat, hard, 1-seeded 15. Onobrychis. 



