60 



may not have been obtained from the variety sterilis Torr. and Gray, taken 

 into cultivation from some other part of its range, which, according to the 

 manuals, extends from southern New Yorlv to Florida and west to Iowa 

 and Missouri. 



Fig. 1 is a photograph of a large clump of H. arborescence var. sterilis 

 Torr. and Gray, which was transplanted from the woods to a blue grass 

 lawn in the open sunshine. When transplanted from the woods, fourteen 

 years ago, it consisted of a small plant with two or three canes. It has had 

 no cultivation save an occasional watering in dry weather. At the present 

 time the clump is three feet in diameter at the ground, and this summer 

 bore sixty-five large heads of snowy-white flowers. 



Fig. 2. — Hydrangea arborescens var. sterilis. Two flower chisters fourteen 

 inches in diameter, borne by a plant two years old from a cutting. 



Fig. 2 represents two flower clusters fourteen inches in diameter borne 



ui>on a plant two years old from a cutting. 



Torrey and Gray^ (Flora of North America, vol. 1, page 591) recognized 



four varieties of Hydrangea arborescens L. described as follows : 



"a. Vulgaris: leaves ovate, obtuse at the base; flowers commonly all 



fertile. — H. arborescens, L. ! (pi. gronov!) H. vulgaris, Michx. ! 



etc. 



"b. Cordata: leaves broadly ovate, more or less cordate, large; a few 



of the marginal flowers radiate, sterile. — H. cordata, Pursh. ! 



I.e. ; DC. I.e.. 



"c. Oblonga: leaves ovate — oblong, mostly acute at the base; a few 



of the marginal flowers radiate, sterile. 



"d. Sterilis: flowers all sterile and radiate. The specimens upon 



which the description of this variety was based was collected at 



Wysox, Penna., by Mr. John Carey." 



