MACLOSKIE I FAGACE^E. 325 



Class II. DICOTYLEDONES. Exogens. 



Seeds with a dicotyledonous embryo. Flowers mostly 5- or 4-merous, 

 occasionally 2- or 3-merous. Stem exogenous. Leaves with reticulate 

 venation. 



Including families 22-113. 



Family 22. SALICACE.E. Willow Family. 



Diceciotis shrubs or trees, with light, brittle wood, simple, alternate, 

 stipulate leaves (the stipules sometimes fugacious or obsolete) ; flowers of 

 each sex in catkins, the individual flowers in the axils of bracts, each sub- 

 tended by a disk, but without perianth. Male flowers 2-many-staminate. 

 Female flowers with a free i -celled ovary having many erect ovules. 

 Seeds plumose, without endosperm. 



Species 200, in 2 genera ; most in the N. Temperate and Arctic regions. 



SALIX Linn. 



Bracts entire. Stamens few, mostly 2, not exceeding 10. Style short; 

 with 2 stigmas. Leaves mostly narrow. 



Species 160 ; i each in Sumatra, S. Afr., Chili-Patagon. ; a few in Mex. ; 

 the rest northwards in Eurasia and Amer. 



S. HUMBOLDTIANA Willd. (S. magellanica Poir.) 



A tree with strict vimineous branches, glabrous. Leaves lance-linear, 

 attenuate, denticulate, exstipulate. Catkins on leafy branches, stalked, 

 dense. Capsules ovate-conical, long-pedunculate. Stigmas sessile. 



N. Patagon. Mouth of Rio Chubut. (Dusen.) 



Family 23. FAGACE.E. Beech Family (with oak, etc.). 



Monoecious trees or shrubs, with alternate, simple, petioled, mostly ser- 

 rate, pinnately nerved leaves, the stipules, if any, deciduous. Flowers 

 small, the males in cylindrical or globular catkins ; the females i to several, 

 enclosed in an involucre, whose bracts form a burr or cup for the fruit. 

 Perianth single, 4-8-lobed. Stamens as many, or more. Ovary superior, 

 3~7-celled ; ovules few ; only i in the nut. 



