262 PAPILIONACEAE. [Vol.. II. 



Family 49. PAPILIONACEAE L. Ord. Nat. 1764. 



PEA FAMILY. 



Herbs, shrubs, vines or trees, with alternate mostly compound stipulate 

 leaves, and irregular (papilionaceous) perfect or sometimes polygamo-dioecious 

 flowers, mainly in spikes, heads, racemes or panicles. Calyx 4~5-toothed, or 

 4-5-cleft, the teeth or lobes unequal or equal; sometimes 2-lipped. Petals more 

 or less united, or separate, perigynous or hypogynous, usually consisting of a 

 broad upper one (standard, banner), two lateral ones (wings), and two front 

 ones more or less united (forming the keel); the standard encloses the wings 

 in the bud. Stamens monadelphous, diadelphous, or sometimes separate, 10 in 

 most of the genera, sometimes 9, rarely 5. Pistil i, simple, superior; ovary 

 mainly i -celled, sometimes 2-celled by the intrusion of the sutures, or several- 

 celled by cross-partitions; style simple; ovules i-many, anatropous or amphitro- 

 pous. Fruit a legume, i -many- seeded, dehiscent into 2 valves, or indehiscent, 

 in one tribe a loment. Seeds mostly without endosperm; cotyledons thick. 



There are about 310 genera and 5000 species, most abundant in temperate and warm regions. 

 The family is also known as PHASEOLACKAE, and is included by some authors in the LEGUMINOSAE. 



-;;- The 10 stamens distinct. 



Leaves pinnate. Tribe i. SOPHOREAE. 



Leaves digitate (in ours 3-foliolate), or simple. Tribe 2. PODALYRIEAE. 



-X- -5f The stamens monadelphous or diadelphous. 

 Herbs, shrubs, woody vines or trees, the leaves not tendril-bearing. 

 Pod not a loment, 2-valved or indehiscent. 



Foliage not glandular-dotted (except in Glycyrrhiza, which has many-seeded pods). 

 Stamens monadelphous; anthers of 2 kinds. Tribe 3. GENISTEAE. 



Stamens diadelphous (except in Ononis); anthers all alike. 

 Leaves, in our species, 3-foliolate, rarely i-foliolate. 



Leaflets denticulate. Tribe 4. TRIFOLIEAE. 



Leaflets entire. Tribe 5. LOTEAE. 



Leaves pinnately several-many-foliolate (except in Orofhaca). 



Tnbe 7. GALEGEAE. 



Foliage glandular-dotted; pod indehiscent, i-a-seeded; herbs. Tribe 6. PSORALEAE. 

 Pod a loment; herbs. Tribe 8. HEDYSAREAE. 



Herbaceous vines, or herbs; leaves evenly pinnate, with tendrils. Tribe 9. VICIKAE. 



Vines, ours herbaceous, or erect herbs; leaves odd-pinnate, mostly 3-foliolate, without tendrils. 



Tribe 10. PHASEOLEAE. 



Tribe i. SOPHOREAB. 



Our species herbs; flowers racemed. i. Sophora. 



Trees; flowers panicled. 2. Ciadrastts. 



Tribe 2. PODALYRIEAB. 



Ovary sessile, or nearly so; pod flat in our species. 3. Thermofisis. 



Ovary distinctly stipitate; pod inflated. 4. Baptisia. 



Tribe 3. GENISTBAB. 



Herbs, with simple or s-ii-foliolate leaves. 



Leaves simple; pod inflated. 5- Crotalaria. 



Leaves 5-1 i-foliolate; pod flattened, o. Lupinus. 



Shrubs, with i -3-foliolate leaves. 



Calyx divided into 2 lips; leaves very prickly. 7. Ulex. 



Calyx cleft into 2 lips to about the middle. 



Calyx-teeth long. 8. Genista. 



Calyx-teeth short. 9- Cytisus. 



Tribe 4. TRIFOLIKAB. 



Flowers spiked, or capitate; pods curved, or coiled. 10. Medicago. 



Flowers in long racemes; pods coriaceous. n. Melilotus. 



Flowers capitate or umbelled; pods straight, membranous. 12. Trifolium. 



Tribe 5. LxXTEAB. 

 A single genus in our area. J3- Lotus. 



Tribe 6. PsORALEAB. 



Leaves digitately 3-5-foliolate, or pinnately 3-foliolate. 14. Psoralea. 



Leaves pinnately 5-many-foliolate. 



Stamens 10 or 9, monadelphous, at least at the base. 



Corolla of only i petal (the standard). 15- Amorpha. 



Corolla of 5 petals, the wings and keel united to the filament-tube. 16. Parosela. 



Stamens only 5, monadelphous. '7- Kuhnistera. 



Tribe 7. GALEGEAE. 



Standard very broad, ovate or orbicular. 

 Herbs; leaves odd-pinnate. 



Pod 4-angled in our species. 18. Indigofera. 



Pod flat. 19- Cracca. 



