Carvophyllaceae 159 
I. Leaves 12—25 mm. or more long. 
J. Leaves prickly-pointed; valves of the capsule 2-toothed or -cleft. 
K. Sepals obtuse, broadly ovate; petals obovate; flowers in loose cymes. 
W.C.E. (A. capillaris nardifolia; A. capillaris formosa; A. for- 
mosa. ) A. capillaris Poir. 
KK. Sepals acute or acuminate, ovate or ovate-lanceolate. 
L. Plant not glaucous; leaves ciliolate-serrate at base: petals nar- 
rowly oblong. 
M. Stem smooth; flowers in dense clusters. E. 
A. congesta Nutt. 
MM. Stem glandular or puberulent-glandular; flowers in loose 
clusters. E. (A. congesta subcongesta; A. burkei; A. salmon- 
ensis; apparently A. uintahensis. ) 
A. glabrescens Pip. 
LL. Plant decidedly glaucous; flowers in loose clusters. 
N. Petals elliptic-oblanceolate, 11/,—2 times as long as the se- 
pals; leaves not ciliolate at base. E. 
A. aculeata Wats. 
NN. Petals obovate, not over 11/4 times as long as the sepals; 
leaves ciliolate or not at base. E. 
A. fendleri Gray 
JJ. Leaves not prickly-pointed; valves of the capsule entire. 
O. Stem either glandular-pubescent, or else leafy to the top; leaves not 
fascicled in the axils of the stem-leaves; sepals veinless or |-veined or 
obscurely 3-veined. 
P. Plant glabrous, in swamps; leaves acute. W. 
A. paludicola Rob. 
PP. Plant glandular-pubescent, on dry hillsides; leaves either ob- 
tuse or hair-pointed. 
Q. Leaves hair-pointed; flowers 3—10 mm. wide; sepals plainly 
or obscurely veined; petals obovate; seed margined, much flat- 
tened. W. 
A. douglasii Fenzl. 
QQ. Leaves obtuse; flowers 5—6 mm. wide; sepals veinless; 
petals oblong; seed not margined, not flattened. W. 
A. howellii Wats. 
OO. Stem glabrous, and leafy nearly to the middle; leaves conspic- 
uously fascicled in the axils of the stem-leaves; sepals prominently 3- 
veined. W. A. stricta Michx. (Rock Sandwort) 
II. Leaves 2—11 mm. long. 
R. Stem pubescent or puberulent, or at least the pedicels so. 
S. Annual; sepals either vemless or acuminate. 
T. Leaves obtuse; sepals veinless. W. 
A. howellii Wats. 
TT. Leaves attenuate to a hair-point; sepals strongly 3-veined. W. 
A. tenella Nutt. 
SS. Perennial; sepals plainly 1—3-veined and obtuse. 
U. Petals spatulate, 1—1!/2 times as long as the sepals. C. E. 
A. sajanensis Willd. 
UU. Petals broadly obovate, 2 or more times as long as the se- 
pals. W. 
A. arctica Stev. 

