400 



MANUAL OF POISONOUS PLANTS 



LEITNERIALES 



Shrubs or trees with entire, petioled, simple leaves; flowers in catkins; 

 staminate flowers subtended by what appears to be a perianth; sepals 3-4; 

 ovary 1-celled; style slender; endosperm thin. Only one family, the Leitneri- 

 accae, which consists of a single genus Leitneria, with perhaps 2 species. L. 

 iloridana occurs in swamps in southern Missouri to Texas and Florida and pro- 

 duces a wood lighter than cork, probably the lightest wood known. 



JUGLANDALES 



Trees w-ith alternate, pinnately-compound leaves ; flowers monoecious, brac- 

 teolate; the staminate in long drooping catkins; pistillate solitary or several to- 

 gether; staminate flowers of 3-many stamens with or without a perianth; peri- 



I'ig. 182. Black Walnut (JiigUrr.s iiigiii)- 1. Flowering branch. 

 i'. Mainin;itc How< r befni<- ani'Ubis, eii^.Trg.fl.. 3. Staminate 



flower, enlarged. 4. Perianth of staminate flower, enlarged. 5. 

 Stamen, enlarged. 6. Pistillate flower, natural .size. 7. Longitudinal 

 .section of pistillate flower, natural size. 8. I.caf, reduced. 9. Win- 

 fi r branchlet. 10. Mattirc fiuit. 11. Walnut with husk removed. 

 1, 9, 10, 11, one-half natural size. M. M. Cheney. 



