94 



WEEDS AND USEFUL PLANTS. 



Stamens diadclplious. Pods several- 

 seeded, at length 2-valved, 1-celled 

 (rarely with cellular partitions be- 

 tween the seeds). Leaves unequally 

 pinnate. Flowers in racemes. 



Pods flat and thin, margined on one 

 edge. Trees or shrubs ; leaflets 

 stipellate. 



Pods tumid marginless. Shrubs 

 with long twining stems ; leaf- 

 lets not stipellate. 

 Keel with a subulate spur on each 

 side. Pods deflected on the 

 pedicel, with cellular partitions 

 between the truncate seeds. 

 Herbaceous. 



** Stamens diadelphous. Pod continu- 

 ous, 1-celled. Cotyledons remaining 

 under ground in germination. Herbs 

 with the common petiole generally 

 produced into a bristle or tendril. 

 Leaves without tendrils. 



Leaves odd-pinnate in 4- 6 pairs. 



Pods inflated, 2-seeded. 

 Leaves equally pinnate. Pods form- 

 ed under ground. 

 Leaves with tendrils. 

 Tendril simple, nearly obsolete. 

 Seeds large, fixed by one end. 

 Stem erect. 



Tendrils nearly simple. Seeds 

 small, lenticular, 2 in each pod. 

 Tendrils long and branching, calyx 

 lobe leafy. Stipules large. Seeds 

 globular. 

 Tendril conspicuous, calyx lobes 



not leafy. Style hairy. 



*** Stamens diadelphous. Cotyledons rising above ground in germination. 

 Twining herbs, leaves without tendrils. Flowers in racemes. Keel 

 spiral. 



Stamens 10 distinct. Keel petals distinct. Pods inflated. Leaves pal- 

 mately 3-foliolate. 



71 



5. ROBIMA 



6. WISTARIA. 



7. INDIGOFERA 



8. CICER. 



9. ARACHIS. 



10. FABA. 



11. ERVUM. 



12. PISUM. 



13. VICIA. 



14. PHASEOLCS. 

 15. 



2. BEASILETTO FAMILY. C^SALPINEJS. 



Corolla nearly regular, often somewhat papilionaceous, the standard 



then within the other petals. Stamens 10 or fewer, distinct. 



Flowers imperfectly papilionaceous, reddish, appearing before the 



simple roundish heart-shaped leaves. Trees. 16. CERCIS. 



Flowers not papilionaceous. Herbs with simply pinnate leaves and 



yellow flowers. 17. CASSIA. 



Trees with leaves mostly twice pinnate. Flowers not at all papilio- 

 naceous, dioecious or polygamous. 



Flowers dioecious. Stamens 10 and petals 5, inserted on the summit 

 of the funnel-shaped calyx-tube. Pod broad and hard. Leaves 

 2-pinnate. 18. GYMN-OCLADTTS. 



Flowers polygamous. Stamens and Petals 3-5 on the bottom of the 



open calyx. Pod long and flat. Leaves 1 - 2-pinnate. 19. GLEDITSCHIA. 



FIG. 71. The common Pea (Pisum sativum), showing a pinnate leaf with very large 

 stipules, terminated by a tendril ; a papilionaceous flower and an immature leguma. 



