THE WILLOWS OF OHIO. 313 



The Broad-leaved Willow is a species of the Great Lake ba- 

 sin and in Ohio is confined to the northern part of the state. It 

 is common along the western portion of the Lake Shore but pro- 

 bably does not extend beyond Cleveland. 



Salix glaucophylla at times seems to grade into Salix cordata 

 by what are probably a series of hybrids. In other cases it is 

 very difficult to separate from 5. discolor with which it also pro- 

 bably hybridises. 



MYRTILLOIDES. BOG WILLOWS. 



Low shrubs with mostly elliptical, glaucous, glabrous leaves 

 strongly reticulate veined and purplish green; aments and bracts 

 usually reddened, small, few flowered; filaments often partially 

 united showing their affinity with the following group ; a group of 

 three or four species all very similar to the European Salix 

 myrtilloides. 



Salix pedicellaris (Anders). American Bog Willow. 



A low shrub seldom reaching a height of 1 meter, aereal 

 shoots erect, slender, supported in the sphagnum by long creep- 

 ing stems which run far down into the bog putting out numerous 

 rootlets along their length. Leaves when fully grown sometimes 

 9 cm. long and 20-25 mm. broad, but ordinarily smaller, elliptical, 

 oblong, spatulate or rarely obovate, pointed at both ends, entire, 

 slightly re volute, dark purplish-green above, slightly glaucous 

 below, not hairy unless when very young, nearly sessile, venation 

 conspicuously reticulate with meshes large and coarse consider- 

 ing the size of the leaf. Catkins appearing with the leaves, 

 loosely flowered, not more than 25 mm. long in flower, but occa- 

 sionally 5 cm. in fruit, scale short, often no longer than the nec- 

 tary, as broad as long, filaments often more or less united; cap- 

 sules long pedicelled, nearly always glabrous, short conic to cylin- 

 dric-conic, obtuse, sometimes 8 mm. long in fruit, with a decided 

 tendency to turn red or purple. 



Salix pedicellaris is a northern species growing in cold peat 

 bogs where it may be easily recognized by its small size and pe- 

 l-late XVI. Salix purpurea (left) and Salix pedicellaris (right.) 



5. purpurea. Typical branch with opposite and scattered leaves: 

 flowers and fruit typical, the latter from a European specimen; natural 

 size; staminate flower and capsule enlarged three times, photographed 

 and brightened. 



5. pedicellaris. Typical summer branch with small ovate leaf from 

 the base of a twig to its left; staminate and carpellate flowers and fruit 

 typical, the latter not ripe; natural size; staminate flowers and capsules 

 enlarged three times, one of them, marked M, between the leaves of S. 

 purpurea. M 



