410 BOTANICAL GAZETTE [NOVEMBER 
Summary 
1. The plants on the lower and middle beaches of some of the 
coasts of the Elizabethan Islands and Falmouth are found to have 
in general definite zonal distribution. 
2. The shores may be divided into sea beach and sea cliff types; 
the latter may be subdivided into cliff types with Zostera marina 
and those without. 
3. The following plants were selected as ck representative 
of the beach type: Ammophila arenaria, Atriplex. arenaria, Salsola 
Kali, Chenopodium rubrum, Arenaria peploides, Cakile edentula, 
Artemisia Stelleriana, Solidago sempervirens, Euphorbia polygoni- 
folia, Lathyrus maritimus, and Suaeda maritima. Salicornia 
europaea, Limonium carolinianum, Ligusticum scoticum, Zostera 
marina, and Spartina glabra pilosa were taken as representatives 
of the sea cliff type. 
4. The upper half of the middle beach is called the transitional 
zone. 
5. When the lower beach is covered most of the time by water, 
Suaeda maritima, Salicornia europaea, and Limonium carolinianum 
are found in the order given, from ocean to shore. 
6. The forms of the middle beach are found in definite zones, 
and when not present their places are not filled; for instance, 
Atriplex arenaria, Salsola Kali, Chenopodium rubrum, and Arenaria 
peploides are always found in the order given on the lower half of 
the middle beach, while Cakile edentula, Artemisia Stelleriana, 
Solidago sempervirens, and Euphorbia polygonifolia are related to 
Ammo phila in distribution. 
7. As to the cause of this distribution I hope to offer some 
suggestions in the near future. 
Mount HoLtyoke CoLLtecEe 
LITERATURE CITED 
1. BERGEN, J. Y., Some littoral spermatophytes of the Naples region. Bor. 
AZ. 41 3327-333. 19006. 
2. CANNON, W. A., Some relations between salt plants and salt spots. Leland 
Stanford Junior Univ. Publ. Dudley Memorial vol. 123-129. 1913. 
