272 ORDER XLIII. LEGTJMINOS.E. 



29. Calyx 4-cleft Galactia, IS 



Calyx somewhat bilabiate SO 



30. An herbaceous vine Apios, 9 



A shrubby vine Wistaria, 10 



81. Trees and shrubs Amorpha, 25. Robinia, 20 



Herbaceous plants 32 



32. Leaflets few Petalostemon, 27 



Leaflets 7 or more 33 



33. Stamens diadelphous 34 



Stamens monadelphous 85 



84. Stamens 5 in each division jffischynomene, 36 



Stamens 1 in one division, 9 in the other Indigo/era, 23 



85. Legume 2-celled Astragalus, 31 



Legume 1-celled 36 



86. Legume many-seeded Tephrosia, 21 



Legume few-seeded 37 



87. Flowers in dense spikes or capitate Dalea, 26 



Flowers in racemes l'hura, 32 



88. Trees or shrubs Cercis, 45 



Herbaceous plants 89 



89. Flowers yellow 40 



Flowers not yellow Lupinus, 41 



40. Flowers in racemes 41 



Flowers in spikes Zornia, 33 



41. Peduncles opposite the leaves Crotalaria, 40 



Peduncles not opposite the leaves Rhynchosia, 11 



42. Trees Gleditschia, 47 



Not trees ~ 43 



43. Flowers yellow 44 



Flowers rose-color 45 



Flowers white Darlingtonia, 50 



44 Calyx 5-sepaled Cassia, 46 



Calyx 4-toothed Acacia, 51 



45. Legume many-seeded Sclirankia, 49 



Legume few-seeded Mimosa, 48 



Sub-order L— PAPILIONA'CE^E. 



Sepals with an imbricated aestivation. Stamens 10, perigy- 

 nous, or inserted with the petals into the bottom of the calyx. 

 Corolla papilionaceous. 



Tribe I.— VIC'IE^E. 



Stamens diadelphous. Legumes continuous, without contrac- 

 tions. Cotyledons thick, radicle curved. Leaves equally pin- 

 nate, the midrib usually produced into a tendril. 



Genus I.— PI'SUM. Tourn. 16—10. 

 (The Latin name of Pea.) 



Segments of the calyx foliaceous, the 2 superior ones short- 

 est. Style triangular, carinated, with a sharp edge, downy on 

 the upper side. Legume oblong. Seeds globose. 



1. P. sati'vum, (L.) Petioles terete, bearing 3 pairs of ovate, entire, 

 glaucous leaflets. Stipules ovate. Peduncles 2 or many flowered. — 0. 

 Native of the south of Europe. lea. 



