The Southern White Cedar {Chamaecy parts thyoides) occurs 

 at Cedar Pond, east of Greenwood Lake, and in the Cedar 

 Swamp west of Greenwood Lake; also at High Point in the 

 Kittatinny Range. Why has this species, common in the coastal 

 plain region, entered the territory exposed by the retreat of the 

 glacier? Why has it climbed to an elevation of 1600 feet? The 

 Northern White Cedar {Thuya occidentalis) is associated with 

 it at Cedar Pond and at High Point. In the latter place the 

 Red Spruce (as noted) and Rhododendron maximum and 

 Kalmia latifolia are associated with it. 



Panax quinquejolium, the Ginseng, is occasional in the 

 highlands of the Hudson, as is also Lycopodium lucidulum. 

 L. annotinum has Blackhead of the Catskills as its most southern 

 record. The Cancer-root, Conopholis americana, is found at 

 moderate elevations in Harriman Park. Coptis trifolia occurs 

 in a few cold, wet woods in the Highlands of the Hudson, and 

 on the plateau in northern Passaic County, New Jersey. 



Viburnum alnifolium is found in the Highlands of the Hud- 

 son on high, wet ground, Surebridge Swamp and on Bearfort 

 Mountain in northern New Jersey. Claytonia caroliniana has 

 a station on top of Blackhead Mountain in the Catskills. 

 Trillium undulatum occurs in Harriman Park and near Denmark 

 Lake, Morris County, N. J. In the northern Catskills it is 

 common at an elevation of 2500-3000 feet. Cornus canadensis, 

 common in northern New England, is absent from a radius of 

 50 miles about New York City, except one station on Schune- 

 munk Mountain, Orange County, at an elevation of 1600 feet. 



Ledum groenlandiciim, the Labrador Tea, occurs at Bing- 

 ham Pond, in the Taconics, also in the Kittatinny Mountains. 

 The Rhodora (Rhodora canadense) is found on Bearfort Moun- 

 tain near Lake Surprise, and is also near High Point, N. J., 

 but is wanting in the Highlands of the Hudson west of the river. 

 The Bearberry, Arctostaphylos uva-ursi, common in the New 

 Jersey Pine Barrens and at the east end of Long Island from 

 Lake Ronkonkoma to Montauk Point, has been found in three 

 places recently in the Hudson Highlands. It occurs on Black 

 Mountain at an elevation of 1200 feet, Fingerboard Mountain 

 at 1260, and near Greenwood Lake at 1400. Why should this 

 climb the mountains when from its more southern distribution 

 it seems to be a lowland plant? 



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