422 Part IV. Chapter 2. 
American flora, which had its origin in the southern part of the continent 
and migrated northward into Staten Island and Long Island at the close of 
the great ice age. 
In contrast one third of the species on the morainic material is 
common to northern Europe and America. There are .no features on the 
north side of Long Island that are not duplicated in New York and Connec- 
ticut. In the woods the herbs are distinctly northern in their type, hardly 
extending beyond the ridge. The most important of the pine barren plants 
which extend north into Long Island and some of them into Martha’s Vineyard 
(see ante p. 380) and Nantucket are here given: 
Andropogon glomeratus Walt. (= A. 
macrourus Michx). 
Ascyrum hypericoides L. (= A. crux 
Andreae L.). 
Ascyrum stans Michx. 
Aster spectabilis Ait. 
» nemoralis Ait. 
» concolor L. 
Andromeda (Pieris) mariana L. 
Drosera filiformis Raf. [Nutt. 
T) ” INA: NE 
+ 
» » viridiflorumL. 
*Asclepias obtusifolia Michx. 
Arenaria carolinianaWalt. (= A.squar- 
rosa Michx.). 
Catharinea crispa James (= Atrichum 
crispum James). 
Crataegus parvifolia Soland. (= C. 
uniflora Moench). 
Chrysopsis mariana L. 
falcata Pursh. 
Coreopsis rosea Nutt. 
Cyperus cylindricus Ell. (= C. Torreyi 
Britton). 
Eupatorium rotundifolium L. 
> album L. 
las hyssopifolium L. 
» leucolepis T. & G. 
Euphorbia ipecacuanhae L. 
Eleocharis melanocarpa Torr. 
Gnaphalium purpureum L. 
Gaylussacia dumosa Andr. 
Glyceria (Panicularia) obtusa Muhl. 
Hudsonia ericoides L. 
Helonias bullata L. 
Helianthus angustifolius L. 
Ipomoea pandurata L. 
Spiranthes (Gyrostachys) 
Stipa avenacea L. 
Sporobolus serotinus Torr. 
*Tephrosia (Cracca) virginiana L. 
Utricularia subulata L. 
Xyris flexuosa Muhl. 
»  caroliniana Walt. ') 
*Chamaecyparis thyoides L. (= C. 
sphaeroidea Spach). 
*Juncus pelocarpus E. Meyer. 
» scirpoides Lam. (= J. scir- 
poides var. macrostemon 
Engelm.). 
*Kalmia angustifolia L. 
Lycopodium inundatum L. 
Magnolia glauca L. (= M. virginiana 
Polygala lutea L. L.). 
Phlox subulata L. 
Panicum verrucosum Muhl. 
Quercus marylandica Muench. (=. 
simplex 
[Gray. 
nigra L.). 
»  prinoides Willd. 
» Phellos L. 
>» heterophylia Michx. 
»  Rudkinii Britt. 
Rubus cuneifolius Pursh. 
*Solidago puberula Nutt. 
1) JELLIFFE, SMITH Ery: The Flora of Long Island. Lancaster 1899: XI—XI. 
