202 COMMON CANADIAN WILD PLANTS. 



Order LXXXVI. JUGLANDA'CE^ffi. (Walnut V.) ' 



Trees with alternate pinnate leaves and no stipules. !Flow- 

 ersmoncBoious. Sterile flowers in catkins. Fertile flowers 

 solitary or in small clusters, with a regular S-d-lohed calyx 

 adherent to the ovary. Fruit a sort of drupe, the fleshy 

 outer layers at length becoming dry and forming a husk, 

 the inner layer hard and bony and forming a nut-shell. 

 Seed solitary in the fruit, very large and-4-lobed. This 

 Order comprises the Walnuts, Butternuts, and Hickories. 



Synopsis of tUe Genera. 



1. •Iiis'lnus, Sterile flowers in solitary catkins from the previous 



year's wood. Filaments of the numerous stamens very short. 

 Fertile flowers on peduncles at the ends of the branches. C.ilyx 

 4-toothed, witJi small petals at tlie sinuses. Styles and stigmas 2, 

 the latter fringed. Exocarp or husk drying witlioiit splitting. 

 Shell of the nut very rough and irregularly furrowed, 



2. t'jir'ya. Sterile flowers in slender cZwstcrefJ catkins. Stamens 3-10, 



with very short filaments. Fertile flowers in small clusters at Ihe 

 ends of the branches. Calyx 4-toothea ; no petals. Stigmas 2 or 

 4, large. Exocarp 4-valved^ drying and splitting away from the 

 ve7'y smooth and bony mit-shell, 



1. JIIG'lAiVS, L. Walhut. 



1. J. einer'ea, L. (Butternut.) Leaflets oblong-lance- 

 olate, pointed, serrate. Petioles and branchlets clammy. 

 Fruit oblong, clammy, — Eich woods. 



2. J. ni'gra, L. (Black Walnut.) Leaflets ovate-lance- 

 olate, twer-pointed, serrate. Petiolesdowny hut not clammy. 

 Fruit spherical. Wood a darker brown than in the Butter- 

 nut. — Kioh woods ; rare northward. 



8. CAK'YA, Nutt. Hickory. 



1. C. alba, Nutt, (Shell- BARK Hickory.) Leaflets 5, ths 

 lower pair much smaller than the others. Husk of the 

 fruit splitting covipletely into 4 valves. Nut flattish-globii- 

 lar, mucronate. Bark of the trunk rough, scaling off in 

 rough strips. — Kich woods. 



2. C. tomento'sa, Nutt. (White-heart Hickory.) Spa- 

 ringly found in the Niagara district and south-westward. 



