1893. | NEW YORK ACADEMY OF SCIENCES. 19 
tracts of the woodland is in striking contrast to nearly every 
other such locality in this region. 
Apparently the most abundant weed on the island is Hyperi- 
cum perforatum. Other species which might be mentioned in 
the same category are Lepidium ruderale, Potentilla Norvegica, 
Daueus Carota, Erigeron Canadensis, Achillea Millefolium, 
Ambrosia artemisixfolia, Carduus spinosissimus, Chrysanthe- 
mum Leucanthemum, and Rudbeckia hirta. 
Jsnea barbata hangs thickly from the trees in many localities. 
Some of the introduced plants perhaps merit special mention. 
A tree of @sculus Hippocastanum was found on the shore of 
Lake Tashmoo, so remote from any habitation as to appear 
truly native there. Dianthus barbatus and Sedum acre are not 
uncommon along the roadsides, with the very common Silene 
inflata and Saponaria officinale. A bright orange-red flower 
attracted my attention in the middle of a field, which I thought 
at some distance was Asclepias tuberosus, but which turned out 
to be Lychnis chalcedonica. 
Following is a complete list of the species noted during the 
brief period of my visit. It was made up from such as were 
observed without effort, some species in flower, some in fruit, 
and may therefore be considered merely as representing the 
commonest or most conspicuous species of the midsummer flora 
of the island, in that part of it between Vineyard Haven and 
Gay Head. 
1. Castalia odorata (Dryand) Greene. 
2. Lepidium ruderale, L. 
3. Helianthemum majus (L.) B. 8. P. 
4, Hudsonia tomentosa, Nutt. 
5. Lechea maritima, Leggett. 
6. Lechea minor, L. 
7. Viola sagitata, Ait., var. ovata, Nutt. 
8. Polygala polygama, Walt. 
9. Silene vulgaris (Moench) Garcke. 
10. Saponaria officinalis, L. 
11. Dianthus barbatus, L. 
12. Lychnis chalcedonica. L. 
13. Sagina decumbens (Ell.) T. & G. 
14. Hypericum perforatum, L. 
15. Oxalis stricta, L. 
16. Ilex verticillata (L.) Gray. 
17. Vitis wstivalis, Michx. 
18. Rhus copallina, L. 
19. Rhus Toxicodendron, L. 
20. Rhus Vernix, L. 
21. Trifolium arvense, L. 
22. Cracca Virginiana, L. 
23. Lathyrus maritimus (L.) Bigel. 
24, Prunus serotina, Ebrh. 
