P. Porsitp 
Monten 
9 
0 
Summary of distinguishing characters, stated by various authors. 
Growth-form......... - 
[Ga was sdOrin'.. cc). Arhier cease 
length of leaves, mm..... 
breadth of leaves, mm.... 
TRO VeNa kG: «nce cre ie 
upper surface of leaves 
HOTSL OUGSiee ee cer er 
calyx-teeth TE CRORCH CLR CEG i eae 
BROWN GI Sicanecee ater sae es ele vens 
length of stamens........ 
size of capsule, mm...... 
form of capsule.......... 
style of ripe capsule .... 
base of ripe capsule-valves 
peduncle of ripe capsules. 
climate of occurrence..... 
geographical range ....... 
Ledum palustre. 
a small, erect, not much 
branched shrub, up to 1m 
linear 
15—2”—45 
mostly smooth 
ovoid 
rather long ciliate 
mostly 10 
longer than corolla 
2.5—3.5 <X 6—7 
ellipsoid 
thin, as long as the capsule 
distinetly recurved 
from a_ straightish base 
evenly curved 
boreal, continental, lowland 
Northern Eurasia, ? Western 
N. America 
Ledum decumbens 
a decumbent, much bran- 
ched shrub, up to 0,5 m 
narrow linear 
7—13—21 
1—1,75—8 
7—8 
areolate wrinkled 
ovoid 
short ciliate 
mostly 10 
longer than corolla 
2—3.5 x 3—4 
ovoid or subglobose distinet- 
ly smaller and shorter 
thick, often shorter than 
capsule 
indistinctly or not recurved 
abruptly bent under the 
capsule, otherwise near- 
ly straight 
arctic or alpine, also near 
the coast 
Eastern Arctic Asia, Arctic 
N. America, W. Greenland 
Ledum groenlandicum. 
an erect, not much bran- 
ched shruh op to 1m. 
oblong 
11—20—35 
3—6—13 
2—38 
coarsely areolate wrinkled 
subglobose 
short or indistinctly ciliate 
5—7 
like the corolla 
3—4 « 4—5 
ellipsoid or subeylindric 
thin, distinctly longer than 
capsule 
not recurved 
evenly arcuated through 
their whole length 
boreal, lowland 
Northern America, South- 
ern Greenland 
