GENERAL INTRODUCTION. 
2 2 
The more common undershrubs (some of them growing to be 
small trees) are : Acer Pennsylvanicum , A. spicatum, Prunus pumila , 
P Pennsylvania 2 , P. Virginiana , Spircea salicifolia , 51 tomentosa , 
Rubus odoratus, R. triflofMs , 7?. strigosus , 7?. occidentalism R. villosus , 
7?. Canadensis , 75«y Carolina , Cratcegus coccinea, C. tomentosa , C. 
crus -galli, I’yrus sambucifolia , Amelanchier Canadensis , y/. Canaden- 
sis botryapium , y/. Canadensis oblong if olia, Ribes lacustre , 7?. rubrum , 
Hamamelis Virginica , Cornus circinata , C. stolonifera , C. paniculata, 
C. alternifolia , Lonicera ciliata , Diervilla trifida, Sambucus pubens , 
51 Canadensis, Viburnum lentago, V. acerifolium , K opulus, V. lan- 
tanoides , Ccphalanthus occidentalism Gaylussacia resinosa, Vaccinium 
Pennsylvanicum , /5 corymbosum, Arctostaphylos uva-ursi , Cassandra 
calyculata, Andromeda polifolia , Kalmia ang ust ip olia, K. glauca, Aza- 
lia nudiflora , Rhodora Canadensis, Ledum latifolium, Apocymim 
androscemifolium , Ilex Icevigata, Corylus rostrata, Carpinus Ameri- 
cana, Myrica gale, Alnus viridis, A. incana , Salix (several species), 
and Taxus baccata Canadensis. 
Of the smaller flowering plants the following are among the most 
noticeable: Clematis Virginiana, Anemone Pennsylvania, A. nemorosa , 
Hepatica triloba, T kali dr urn dioicum , Ranunculus flammula reptans, 
R. abortivus, R. recurvatus, Caltha palustris, Copt is trifolia , Aquilegia 
Canadensis, Actcea spicata rubra, A. alba, Ca idophyll um thalictroides , 
Nymphcea odorata, Nuphar advena, Sarracenia purpurea, Sanguinaria 
Canadensis, Dicentra cucullaria, D. Canadensis, Dentaria diphylla , 
D. laciniata, Arabis lyrata, Viola rotundifolia, V. blanda, V. Scl- 
kerki, V. cucidlata, V. canina sylvestris , V. rostrata, V. Canadensis, 
V. pubescens , Drosera rotundifolia, D. longifolia, Helianthemum Cana- 
dense, Hypericum pyr ami datum, H. ellipticum , H. perforatum, Diodes 
Virginica, Silene inflata , Arenaria Grcenlandica , y/. lateriflora, Clay- 
tonia Caroliniana, Geranium Roberiianum, Impatiens pallida, Oxalis 
acctosella, Ampelopsis quinquefolia , Celastmis scandens , Polygala pauci- 
folia, Poterium Canadcnse , Geum macrophyllum , Waldsteinia frag a - 
rioidcs, Potentilla Norvegica, P. Canadensis, P. tridentata, P. palustris, 
