An alpine entry from northern interior Alas- 
ka (Eagle Summit) appeared the most ecological- 
ly plastic in being second in shoot weight and 
flowering culm production in both gardens in 
1974. 
Calamagrostis inexpansa 
A boreal entry was severely winter injured in 
the arctic garden in 1974 and was excluded from 
the analyses at that site. All other entries were 
analyzed at both sites. 
The boreal entries of northern reedgrass 
grew taller than the arctic entries at Palmer; 
results were mixed at Prudhoe (Fig. 13). In most 
cases leaf growth was longer and wider at Prud- 
hoe than at Palmer, whereas flowering culms 
were longer at Palmer. Two of the boreal entries 
from southern interior Alaska failed to produce 
flowering culms at Prudhoe. An arctic entry 
might have been denied flowering through graz- 
ing activity. Flowering culm production was 
much more abundant at Palmer than at Prudhoe 
(Fig. 14). Except for one arctic entry, shoot 
weights were also greater at the boreal site (Fig. 
101 
15). In most cases, the rhizomatous grass spread 
throughout much of the growing area within the 
pots at both sites. A nine-ploid entry produced 
the most top growth at Prudhoe, while a 
15-ploid boreal (tidal flat) entry was the highest 
yielder at Palmer. 
Arctic and boreal tetraploids were the most 
prolific flowering culm producers at Palmer in 
the third season. A northern boreal hexaploid 
was outstanding in the second year but declined 
in the third year. 
All entries decreased in leaf length in the 
third season at Palmer, as did most of the boreal 
entries at Prudhoe. Most of the arctic entries 
increased in leaf length, shoot weight, and 
flowering culm production at Prudhoe and in 
number of flowering culms at Palmer in the 
third season. They showed little improvement in 
shoot weight at Palmer. The boreal entries de- 
creased in shoot weight and number of flowering 
culms at Prudhoe. Most of them increased in 
culm production at Palmer, but results were 
mixed in shoot weights. 
ALOPECURUS ALPINUS — SHOOT WEIGHTS 
ORIGIN: BARROW PRUDHOE ATIGUN 
: CANYON 
60 
36 *——~ Palmer Transplant Garden 
0-—--9 Prudhoe Transplant Garden 
72 73 
FORT 
YUKON 
KENAI 
PENINSULA 
SUMMIT 
LAKE 
° 
74 72 73 74 
YEARS 
Fig. 6. Shoot weights of Alopecurus alpinus over 2- or 3-year period. 7/ Entry 
severely injured or winter-killed. 
