PEA FAMILY 481 



dehiscent by two valves or indehiscent. Seeds generally without endosperm ; cotyle- 

 dons thick. 



A family of over 300 genera and about 5,000 species, widely distributed in mostly temperate and tropical 

 regions. 



Stamens 10, all distinct. Tribe I. Podalyrieae. 



Stamens united and monadelphous or diadelphous. 



Leaves not tendril-bearing. 



Pod not a loment, 2-valved or indehiscent. 



Stamens 10 and monadelphous; anthers of 2 kinds. Tribe II. Genisteae. 



Stamens 10 and diadelphous, or (Petalostemon) 5 and monadelphous; anthers all alike. 



Leaflets denticulate, 3, rarely 4 or 5. Tribe III. Trifolieae. 



Leaflets entire, varying from 1 to many. 



Plants not glandular-dotted, except Glycyrrhiza, which has many-seeded pods. 



Flowers umbellate or solitary. Tribe IV. Loteae. 



Flowers racemose; leaves pinnately several to many-foliolate. 



Tribe VI. Galegeae. 



Plants glandular-dotted; pods indehiscent, 1-2-seeded. Tribe V. Psoraleae. 



Pod a loment, that is, a legume which is contracted between the seeds, breaking apart at the constrictions 

 when ripe into 1-seeded joints. Tribe VII. Hedysareae. 



Leaves pinnate, the rachis terminating in a simple or branched tendril (tendril rudimentary or wanting in 

 Vicia faba). Tribe VIII. Vicieae. 



Tribe I. Podalyrieae. 



Herbs; stipules conspicuous; flowers yellow, racemose. L Therptopsis. 



Spinescent shrubs; stipules none; flowers purple, solitary. 2. Pickeringta. 



Tribe II. Genisteae. 



Leaves palmately 7-11-foliolate; seeds estrophiolate. 3. Lupinus. 

 Leaves 1-3-foliolate or reduced to pungent petioles; seeds strophiolate. 



Leaves phyllodial, reduced to pungent petioles. 4. Ulex. 



Leaves 1-3-foliolate, not pungent. 5 - Cytisus. 



Tribe III. Trifolieae. 



Leaves pinnately 3-foliolate, the terminal leaflet distinctly petiolulate; flowers in racemes or spikes; corolla de- 

 ciduous after anthesis. 

 Style subulate; pod coiled or curved. 6. Medicago. 



Style filiform; pod ovoid, straight, coriaceous. 7. Melilotus. 



Leaves palmately 3-foliolate; flowers in a head or rarely in a short spike; corolla withering-persistent; pod 

 minute, 1-2-seeded, membranous. 8. Trifolium. 



Tribe IV. Loteae. 



Flowers umbellate or solitary; stipules herbaceous, membranous or gland-like. 9. Hosackia. 



Flowers umbellate (in ours); leaflets (in ours) 3, the lowest two sessile and simulating stipules. 



10. Lotus. 



Tribe V. Psoraleae. 



Stamens 10, diadelphous, sometimes only 9 present in Dalea. 

 Petals 5. 



Corolla truly papilionaceous, free from the stamens; leaves mostly palmately 3-5-foliolate, sometimes 



pinnately 3-foholate; heavy-scented herbs. 11- Psoralea. 



Corolla not truly papilionaceous; 4 of the petals attached to the staminal tube near its middle; shrubs 

 or herbs. 13 - Dalea. 



Petal 1; stamens monadelphous at base; shrubs; leaves pinnately many-foliolate. 12. Amorpha. 



Stamens S; the cleft staminal tube bearing 4 of the petals at its summit. 14. Petalostetnon. 



Tribe VI. Galegeae. 



Trees with odd-pinnate leaves and often spines; flowers racemose. 



Pods flattened, wing-margined on the upper suture; introduced tree. 15. Robinia. 



Pods but little flattened, not wing-margined; native of the desert regions. 16. Olneya. 



Herbs or suffruticose plants. 

 Pods not prickly. 



Leaves even-pinnate; standard petal broad. !?• Sesbama. 



Leaves odd-pinnate; standard petal narrow. 



Keel petals not produced into a beak. 18- Astragalus. 



Keel petals produced into a beak. 19- Oxytropis. 



Pods prickly; plants glandular-dotted. 20. Glycyrrhiza. 



Tribe VII. Hedysareae. 



Herbs, not spinescent; leaves odd-pinnate. 



Flowers in pedunculate heads or umbels; pods (in ours) 4-angled. 21. Coronilla. 



Flowers in racemes; pods compressed. 22. Hedysarum. 



Low shrubs with axillary spines; leaves simple. 23. Alhagi. 



Tribe VIII. Vicieae. 



Styles not flattened, villous all around at the apex. 24. Vicia. 



Styles flattened towards the apex, villous on the inner side. 25. Lathyrus. 



1. THERMOPSIS R. Br. in Ait. Hort. Kew. ed. 2. 3:3. 1811. 

 Stout perennial herbs with sheathing scales at base, alternate 3-foliolate leaves, and 



