408 BOTANICAL GAZETTE [NOVEMBER 
which often finds its best location at an Ammophila arenaria out- 
post. The Artemisia Stelleriana presents more or less of a solid 
front and only thin strands of Ammophila are found beyond; in 
fact, it might be said to define the border line of upper and middle 
beaches. Euphorbia polygonifolia becomes established on the 
wind-swept dunes, where there is nothing else, but never is found 
toward the ocean beyond the limit of Ammophila runners. Lathy- 
rus maritimus occasionally extends into the transitional zone, but 
always in company with Ammophila. 
At Falmouth there is an illustration of what is common at 
several of the beaches; at the region of the incoming daily tide 
there is a mass of dry eel grass and immediately back of that a 
Falmouth | Nobske [Lackey Bay Tarpulin |Cuttyhunk |QuicksHole |LackeytBayRam Island |Cuttyhunk | Deer [sland 
Cove Inside Pond 
° . Aan ° ‘ ; 
1 1 
Se eon Rs en te Bat He [teat [tetas s oT eae a Lee 
i] 8 8 9 r) D Ld 
et epee ght ly S19 7 ee o 
nt 7 ons ‘27 o 8 : oe e. ne ae s . es ® 
ere «* ‘7 Gye ley ht ' ' 6 6 +4 8 
caleaad lig t Pa Ae ‘ 
MiddleBeach| 12 7y7/5 ' '5 goers 
6 sé Bie 
4 
oe 3 4 aay ; 4 ” s * s 6 
. 2% 3 3 4 
3 3 4 
Me ae td. ' €, gh Gn ok an 3 . ' 3 
Spring Tide 2 ee 2 2 2 2 233 3 3 2 |3 
VV ¥) 6g 18: 6 
x* a Cc 
xxis 8 ®, 8/8 6 
er hog te @ Oh ee ee 
Daily Tide x xx x y x 
Line 
zone of small shingle, doubtless brought there by the stronger 
spring tide. At the limit of this shingle a slight depression occurs, 
then an elevation and the loose sandy zone with the succulents, 
and beyond this another depression, then an elevation rises slowly 
to the winter storm tide line. 
At Nobska Beach Chenopodium rubrum is abundant, with only 
a little Atriplex arenaria and Salsola Kali, but wherever all three 
are present the same relationship holds, Aériplex being always 
nearer the water than the others. 
Cakile edentula forms masses in front of Ammophila at Lackey’s 
Bay. At Tarpaulin Cove much Salsola Kali is found in mats, and 
bunches of eel grass have been caught by it, forming stable mounds. 
The beach formed at Cuttyhunk Harbor and Vineyard Sound is 
