Blood Root Valley
Rockland, Manor, Brielle Aves., Forest Hill Rd, Staten Island, NY
May 26, 1990
Bloodroot Valley, off Mason Road, produced.
Acer saccharum (sugar maple)
Adiantum pedatum (maidenhair fern)
Athyrium thelypteroides (silvery glade fern)
Caulophyllum thalictroides (blue cohosh)
Cystopteris fragilis (fragile fern)
Hydrophyllum virginianum (Virginia waterleaf)
Isotria verticillata (larger whorled pogonia)
Juglans nigra (black walnut)
Mitchella repens (partridgeberry)
Osmorhiza claytonii (sweet cicely)
Polygonatum pubescens (hairy Solomon's seal)
Polystichum acrostichoides (Christmas fern)
Sanguinaria canadensis (bloodroot)
Sanicula marilandica (black snakeroot)
April 29, 1979, p. 232.
Our trip met at 11 a.m. at the parking lot of High Rock Park Conservation Center. From there we proceeded a short distance to Bloodroot Valley, a steep ravine formed where Richmond Creek has cut its channel into serpentinite bedrock. This valley, located between Manor Road and the Seaview Hospital complex, is notable for its remoteness and unspoiled natural beauty. Due to the relatively high soil pH of about 6.5 (caused by the high magnesium content of the serpentinite parent material) and to the relatively cool microclimate caused by the cool air draining into the valley, the vegetation here is rather unusual. Though absent from the surrounding oak-hickory forest which is developed on acidic glacial deposits, sugar maple (Acer saccharum) is a dominant tree species in Bloodroot Valley. Another striking difference in vegetation between Bloodroot Valley and that of the surrounding area is the lush herbaceous flora found in the valley which includes an unusually high number of rare fern and wildflower species. Among the species on this field trip were the following:
Attendance was 8. Leader, Steve Parisio.