130 COMMON CANADIAN WILD PLANTS. 



ORDER LXXXIII. PLATANA'CEJE. (PLANE TREE F.) 



Represented only by the Genus 



PLAT' ANUS, L. PLANE-TBEE. BUTTONWOOD. 



P. Occident a'lis, L. (AMERICAN PLANE-TREE or SYCAMORE.) 

 A fine large tree found in south-western Ontario. Leaves alter- 

 nate, rather scurfy when young, palmately lobed or angled, the 

 ]obes sharp-pointed ; stipules sheathing. Flowers mono-clou.-, 

 both sterile and fertile ones in catkin-like heads, without calyx 

 or corolla, but with small scales intermixed. Ovaries in the fer- 

 tile flowers club-shaped, tipped with the thread-like simple style, 

 and downy at the base. Fertile heads solitary, on slender 

 peduncles. The white bark separates into thin plates. 



ORDER LXXXIV. JTJGLANDA'CE.SI. (WALNUT F.) 



Trees with alternate pinnate leaves and no stipules. Flowers 

 monoecious. Sterile flowers in catkins. Fertile flowers solitary 

 or in small clusters, with a regular 3-4-lobed calyx adherent to 

 the ovary. Fruit a sort of drupe, the fleshy outer layer at length 

 becoming dry and forming a husk, the inner layer hard and bony 

 and forming the nut-shell. Seed solitary in. the fruit, very large 

 and 4-lobed. This Order comprises the Walnuts, Butternuts, 

 and Hickories. 



Synopsis of the Genera. 



1. Jug'lans. Sterile flowers in solitary citkins from the previous year's 



wood. Filaments of the numerous stamens very short. Fertile flowers 

 on peduneles at the ends of the branches. Calyx 4- toothed, with tuna II 

 petals at the sinuses. Styles and stigmas 2, the latter fringed. Exocarp 

 or huxk drying without splitting. Shell of the nut very rough and 

 irregularly furrowed. 



2. Car'ya. Sterile flowers in slender clustered catkins. Stamens 3-10, with 



very short filaments. Fertile flowers in small clusters at the ends of the 

 branches. Calyx 4-toothed ; no petals. Stigmas 2 or 4, large. Exucarp 

 b-valved, drying and splitting away from the very smooth and bony 

 nut-shell. 



1. JUG'LANS, L. WALNUT. 



1. J. Ciner'ea, L. (BUTTERNUT.) Leaflets oblong-lanceolate, 

 pointed, serrate. Petiolcx and branchlcts clammy. Fruit oblony, 

 clammy. Rich woods, 



