201 
does not flower with us, but the white-flowered southern species, 
C. umbellulata (Fig. 9c), extending northward to New Jersey, 
flowers profusely. 
To the south of the bog will be found the newly-installed lime- 
stone ledges, the characteristic flora of which has already been 
enumerated (p. 187). Additional species to be seen here are the rue 
anemone (Anemonella thalictroides, Fig. 13f), Anemone virgimana, 
Ranunculus hispidus, early saxifrage (Savifraga virginiensis, Fig. 
12c), and the maiden-hair fern (Adiantum pedatum). On the 
crest of the rocks are arbor-vitae (Thuya occidentalis), slippery 
elm (Ulmus fulva), butternut (Juglans cinerea), Viburnum pu- 
bescens, the bladder nut (Staphylea trifolia), and prickly ash 
(Zanthoxrylum americanum) ; these are more or less characteristic 
of limestone outcrops. 
Just beyond the bog will be found a wet meadow into which the 
brook drains. The earliest plant to flower in this meadow is the 
globe-flower (Trollius larus, Fig. 10d), soon followed by the 
marsh marigold (Caltha palustris, Fig. 10e), winter cress (Bar- 
barea vulgaris), purple avens (Geum rivale, Fig. 10b), golden rag- 
wort (Senecio aureus, Fig. 10a), and Ranunculus septentrionalis, 
and later by a thicket of herbaceous plants such as the beaver 
poison (Cicuta maculata) and Lilium canadense, and, as autumn 
approaches, by a wealth of goldenrods and asters. 
Along the brook can be seen skunk cabbage (Symplocarpus 
foetidus), Jack-in-the-pulpit (Arisaema triphyllian), Virginia cow- 
slip (Mertensia virginica, Fig. 10c), various species of ferns, dog- 
tooth violet (Erythronium americanum, Fig. 13b), Claytoma vir- 
ginica (Fig. 12c), May apple (Podophyllum), goldthread (Coptis 
trifolia, Fig. 9d), several violets (Miola affinis, 1’. blanda, I’. pal- 
lens, V. primulifolia, 1’. lanceolata, V’. papilionacea, I’. cucullata, 
I’. striata), miterwort (Mitella diphylla), false miterwort (Tiarella 
cordifolia), toothwort (Dentaria diphylla), Anemone quinquefolia 
(Fig. 13¢) and A. canadensis, water-leaf (A ydrophyllum vir- 
ginianum), and bluets (dfoustonia caerulea, lig. 12d). 
The northern end of the two acres is taken up by a woodland of 
red and black oaks (Quercus rubra and Q. velutina), beech (agus 
grandifolia), tulip tree, black birch (Betula lenta), and sugar 
maple (Acer saccharum), set out in 1918 and representing the Alle- 
