APPENDIX. 



is born to blush unseen," save by the prying eye of the botanist. Commencing at 

 the northern border we soon arrive at the "Narrows," or "Nockamixon rocks." Of 

 the grand natural scenery here we need not speak, for it is, or should be, well- 

 known to every Bucks countian. This locality is the richest in the county, and has 

 many plants peculiarly its own. It has long been a botanical Mecca to the Easton 

 botanists, led by Professor T. C. Porter, of Lafayette college. Here are found the 

 rare Sedum-Rhodiola. Canada Water Leaf, Canada Violet, Ginseng, Purple Trillium, 

 and many more equally rare. Proceeding rapidly down the river, meeting many fine 

 plants on the way, such as Harebell, American Bell Flower, Papaw, American 

 Vetch, etc., etc., we reach Point Pleasant, another botanical centre. In this neigh- 

 borhood a very rich Flora exists, certainly surpassed by no other district of equal 

 area in the county. Among a multitude, we may mention Green Violet, Pencil 

 Flower, Indian Plantain, Squarrose Solidago, Golden Corydalis, Leather Wood, 

 Beaked and Cordate Willows, Silver Maple, etc. Southward from Point Pleasant 

 we hasten, not pausing to note individual peculiarities by the way, until the vicinity 

 of Bristol is reached, another botanical point of special interest. There we meet 

 with a Flora 'differing in a marked degree from those hitherto noticed. Southern 

 forms appear and the vegetation assumes much of the character of that of New 

 Jersey. The influence of the tide is here also felt, and adds its peculiar character 

 to the Flora. Much of interest might be written in regard to this district, but a 

 w^ant of space forbids. As plants characterizing this region, Magnolia, Clammy 

 Azalea, White Alder, Stagger Bush, Rose Mallow, and Sweet Gum may be men- 

 tioned. At Andalusia, I. C. Martindale finds many rare plants, but the catalogue 

 must be referred to for particulars. Having passed in rapid review the most inter- 

 «sting botanical districts of the county, we will now proceed to consider, equally 

 briefly, the botanical features of the county as a whole. In studying the Flora of 

 the county, one fact is at once apparent, namely, the great difference in the vegeta- 

 tion of the northern and southern portions. We find that upwards of ninety native 

 plants have not been collected north of Yardleyville, and on the other hand about 

 one hundred and fifty native plants have not been found south of that place. This 

 interesting fact demonstrates that a line dividing the more distinctively northern 

 from the southern species of Pennsylvania would pass through Bucks a little to the 

 •north of that point. Many northern forms seem to have their southern limits in 

 •our county, except as they extend further south in the mountains to the west of us. 

 A few western plants have here their eastern limit, notably the Papaw, and narrow- 

 leaved Horse Gentian. A small number of eastern plants also have here their western 

 limit. A comparison of the catalogue with Gray's Manual will make these facts 

 more apparent. The materials for the following catalogue have been collected by 

 the author, and his botanical friends, in many a pleasant ramble over the hills and 

 valleys of old Bucks. During a residence of ten years at Plumsteadville, and seven 

 in Quakertown borough, opportunity has been given to explore, pretty thoroughly, 

 the middle and upper districts, while occasional excursions have also been made to the 

 lower districts. Efficient aid has been rendered in the preparation of the catalogue 

 by Professor T. C. Porter, of Easton, and I. C. Martindale, of Camden, New Jersey, 

 but formerly of Byberry, in Philadelphia. Other botanists have kindly aided in 

 the work, and the author has been careful to give due credit in the body of the 

 catalogue. All the plants of the list have been seen by the author, and every pre- 

 caution taken to avoid mistakes in identification. Some of the more difficult species 

 have been sent to botanical friends for corroboration. In arrangement and nomen- 

 clature the last edition of Gray's Manual has been followed. Although the number 

 of species is gratifyingly large, the field is by no means exhausted. There is no 



