1910] HOW E—REFORESTATION OF SAND PLAINS 139 
controlled by Myrica and Pteris. As the trees become more abundant 
these are gradually crowded out, until beneath the dense stand they 
disappear. The saplings nearest the seed trees are 25 years old and 
those farthest from the seed trees are 8 years old. 
PS as | Hy 
L 
= , 
Si GR Ses (Se y | 
= y vj [Viv | 
y | A 
ead y ¥ 
pt y v 
oka ¥ 
1} IPS a 
eet 
Ge SE a v 
Se ee viv y 
oo Vly y. Dp & p—4t_} __d_} 
Seats ie ’ y 25: 22a ee 
aD) Ee v 
nd th 
aS aii) 
BESCO eee 7 
ae ee ee 6 
i BE i AG es v 8 SLI ELT 
jt} | | |Pa e y GB 68 _ 
v 
ae C2 a A A eS ae ri Y y 
Seam tee VV y 
SS cea ae ie oy ba 
tt tvivi | TT J e5|es 28 wae 
: a 
[5 2 Ge aes aes ee ee 
a eo ee ee y v 
BOK x : Tis 1. 
Sot te HH os He : a og Ue Re ral 
Pt tt tt tes [68 | jes 68 TT aA a ae Siar oo SP set a a 
Se a 68 ge 7 68 FS s 
++ Gee SS tee Pea MO al Hh 68 — 
ae ee ie | }G8 68 e 
Livy i 68 
SUSFZESEBE EEG A 
— il @ a | Br Lo 
= ie wed EE Ws ee te iit ca SE aR | PR 
a SRS cee ee 
— oe 
fet 
i 6B 
PS ts 
ang é REE 
i + 
Fic. 7.—Sample plot 10. Pitch pine stand 60 years old, Colchester plain, 5 meters 
Square; under layer, Carex pennsylvanica; PR, Pinus rigida 4; PS, Pinus Strobus 11; 
V, Vaccinium vacillans 59; GB, Gaylussacia baccata 44; K Koleta angustifolia 5; 
QA, Q. alba 1; L, oe quadrifolia 1; VP, Vaccinium pennsylvanicum 12; 
P, Plteris aquilina 26, 
On p. 138 is given a sample plot (fig. 6) made in a stand of pitch 
pine 25 years old. Oaks are common in stands of this kind, but 
they are usually suppressed and apparently never become members 
of the dominant class. 
An even-aged stand of pitch pine (36 years. old on the stump) 
