122 Monren P. Porsizp. 
revolute margins. The lowest and the topmost leaves, ordinarily 
somewhat smaller than the rest, were not taken into consideration. 
On shoots with a sufficient number of leaves, 10 were measured. other- 
wise a smaller number. In all 923 leaves of 135 specimens were inve- 
stigated. 
In the following lists I—V. marks 
N the number of leaves measured, 
| the length in millimetres, 
b the breadth in millimetres, 
I/b the ratio between lenght and breadth, i. e., the shape 
of the leaves. 
The lists are arranged after the ratios, beginning with the broadest 
and ending with the narrowest leaves. 
I. Ledum decumbens. 
West-Greenland, 63°—-70° Lat. N. 
ls 
i 
Ss 
Kangerdluarssuk 72°38’, Ryder ........... ( 
Caeelates me 3,84 
Qegertalik ..... 66°44’, Brummerstedt.... 6 13,5 3,0 4,50 
Nakajanga..... 665002 Je Ae Ds Jiensenls2 26 8,7 1,9 4.58 
Qeqertarssuaq.. 72°53’, Ryder ........... Die eso 1,6 4,69 
Godhavn ...... COsIb eRe Brownlee eee hy Wah eT | 4,78 
Holsteinsborg .. 66°56’, Lundager........ Geeleleel 2,3 4.83 
INunmatarssuaq¢ 647300) JeoViahlll 2. oc tf 9,1 1,6 5,69 
Holsteimsborg .. 66°56’, Deichmann....... 6 9.8 ilagi Sit 
Pakitsoq...... Oe ae, do Wala, cccaesces @ Tie 1,9 5,92 
Diskofjord..... COPA Wl, 12s Worn! ooo 4 10 13,8 2,3 6,00 
Kangerdluarssuk 67°58’, E. Porsild........ 10 10,4 it 6,02 
Diskofjord....- G92 9 Aa Vile easorsildieee 10 16,0 2,3 6,09 
Uvkusigssat ... 72°18’, K. J. V. Steenstrup 6 11,8 iL 6,21 
IiSonboqeamerrer Orly, dp Walls gosecc006 @— ilghil 2,1 6,24 
Laksefjord..... Weagdile she co Me Pa Porsild dO W426 2,3 6,27 
Skansenmeee ee 69s ee Ving seorsil dieeerer OS eG 1,8 6,36 
Kenvo Open see G6R452 oJ Viahleia as oeiee 7 BHO 2,0 6,50 
lakobshawvnersem OO mils am Bin cellis reese 6) 1352 2,0 6,60 
Holsteinsborg .. 66°56’, J. Vahl .......... By 15} 5) 2,0 6,75 
AMTEUINEO} 5G 6 a 3 0c 68°48’, M. P. Porsild ..... LO LOS 1,5 6,75 
Godthaab ..... GAS eal ee Gen racy: Ce D) 2,5 6,80 
Thorssmllemeale £55 (OBPDSY SwllONos 55454 500c 7 13,4 1E9 7,02 
( 
UMMC) 5 > COBY, dis Walle boca eesec CAD iG 7,06 
