94 



of reforestation has l^een expedited in a few places by artificial 

 planting of both native and exotic trees. 



My first visit to Cape Cod w^as made in October, 1920, under 

 very favorable circumstances. My life-long friend Clarence H. 

 Knowlton, of Hingliam, Mass.. an amateur botanist and a fre- 

 quent contributor to Rhodora, was about to make a business trip 

 in his automol)ile the whole length of the Cape, and invited me to 

 accompany him. In three days, the 13th, 14th and 15th, we passed 

 through every one of the fifteen towns in Barnstal)le County, and 

 as the roads were practically all of smooth asphalt, and our speed 

 seldom exceeded 25 miles an hour, I was able to make legible notes 

 practically every mile of the way. Although I had to keep my 

 eyes on my notebook about half the time, and thus might have 

 missed many interesting plants, Mr. Knowlton, who was already 

 familiar with the ground, often called my attention to them. 

 When he stopped in the towns, sometimes for an hour or more, I 

 usually walked ahead and examined the vegetation near the road 

 until overtaken ; and at the more interesting places we both got 

 out to reconnoiter. 



In this way I secured a reasonably accurate census of the exist- 

 ing vegetation of the whole county, aside from the rarer species, 

 those not recognizable in October, those chiefly confined to beaches 

 and marshes, and the bryophytes and thallophytes (which, how- 

 ever, like the rare species, make up a very insignificant proportion 

 of the total bulk of vegetation). But my notes are of course not 

 complete enough yet for any one of the five or more geographical 

 subdivisions (still less so for different habitats) to warrant treating 

 them separately here ; so that the following list is to be regarded 

 as an average analysis of the native and naturalized plant covering 

 of the whole Cape. 



It is divided into trees, woody vines, shrubs, undershrubs, and 

 herbs, and the species in each group arranged in approximate order 

 of abundance, beginning with the most abundant (as has been my 

 wont for about 15 years past), and omitting those seen only once. 

 The names of evergreens are in heavy type, and of species believed 

 not to be indigenous in parentheses. The normal mode of dissemi- 



