94 



WEEDS AND USEFUL PLANTS. 



Stamens diadelphous. Pods several- 

 seeded, at length 2-va!ved, l-celled 

 (rarely with cellular partitions be- 

 tween the seeds). Leaves unequally 

 pinnate. Flowers in racemes. 



Pods fiat and thin, margined on one 

 edge. Trees or shrubs ; leaflets 

 stipellate. 5. Robi.nu 



Pods tumid marginless. Shrubs 

 with long twining stems ; leaf- 

 lets not stipellate. 6. Wistarij^. 

 Keel with a subulate spur on each 

 side. Pods deflected on the 

 pedicel, with cellular partitions 

 between the truncate seeds. 

 Herbaceous. 7. Ixdigofeiu 

 ** Stamens diadelphous. Pod continu- 

 ous, l-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. 8. Cicer. 



Leaves equally pinnate. Pods form- 

 ed under ground. 9. Aracbos, 

 Leaves with tendrils. 

 Tendril simple, nearly obsolete. 

 Seeds large, fixed by one end. 

 Stem erect. 10. Faba. 

 Tendrils nearly simple. Seeds 



small, lenticular, 2 in each pod. 11. Ervum 

 Tendrils long and branching, calyx 

 lobe leafy. Stipules large. Seeds 

 globular. 12. PisuM. 



Tendril conspicuous, calyx lobes 



not leafy. Style hairy. 13. Vicu. 



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

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

 spiral. 14. Phaseolus. 



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



mately 3-foliolate. 15. Baptisu. 



2. BEASILETTO FAMILY. C^salpine^. 



Corolla nearly regular, often somewhat papihonaceous, 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. Ceeos. 



Flowers not papilionaceous. Herbs with simply pinnate leaves and 



yellow flowers. 17. Cassu. 



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. Gtmnocladtjs. 



Flowers polj^gamous. Stamens and Petals 3-5 on the bottom of the 



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



Fig. 7 1. The common Pea (Pisum sativum) , showing a pinnate leaf with very large 

 etipules, terminated by a tendril ; a papilionaceous flower and an immature legume. 



3^ 



