JUGLANDACEAE. 



15 



PLATYCARYA. 

 (Family Juglandaceae). 



Trees:' deciduous. Twigs mod- 

 erate or rather slender, terete, 

 with fine lenticels: pith rounded, 

 moderate, pale, continuous. Buds 

 rather small-, superposed, sessile, 

 ovoid, with some 4 or 5 exposed 

 scales. Leaf -scars alternate, 

 shield-shaped: bundle-traces 5 or 

 7: stipule-scars lacking. 

 Twigs glabrous: buds puberulent 

 or glandular. P. strobilacea. 

 Though not much used in dec- 

 orative planting, the Juglandaceae 

 are effective occasionally as speci- 

 mens or massed in the distance, 

 and some of them are of rapid 

 growth. The native hickories and 

 walnuts furnish especially valu- 

 able wood, the former almost in- 

 dispensable in the manufacture of 

 farm implements, and the latter 



at one time the most used cabinet wood the main reliance 

 for gunstocks. An interesting popular account of the geo- 

 logical history of the family, by Berry, is to be found in 

 volume fifteen of The Plant World. 



Winter-character references: Platycarya stroMlacea. 

 Schneider, f. 135; Shirasawa, 257, pi. 6. 



Winter-characters to the principal Juglandaceae Juglans 

 and Carya are collected between the discussion of those two 

 genera. The family is interesting anatomically because of the 

 marked and characteristic differences between the solid pith 

 of this genus and Carya in contrast with the chambered pith 

 of Juglans and Pterocarya. 



