122 Monten P. Porsiip 
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- 
stigaled. 
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. 
L b Ib 
Kangerdluarssuk 72°38’, Ryder ........... leg 35 3,84 
Qegertalik..... 66°44’, Brummerstedt.... 6 13,5 3,0 4,50 
Nakajanga..... 66°50’, J. A. D. Jensen... 6 8,7 1,9 4.58 
Qegertarssuaq.. 72°53’, Ryder ........... ye 53) 1,6 4.69 
Godhavniese-ne (AF lay IR, IBYRON AN oo Goon ae De 32 2,1 4,78 
Holsteinsborg .. 66°56’, Lundager........ 6) eal 2,3 4.83 
NMEA WAISTENG) 5 (LEAING Uo Well 9553555 2< go Sh 1,6 5,69 
Holsteinsborg .. 66°56’, Deichmann....... Os ity SEN, 
Pakitsoq...... CS Heed Le NVAail alli, tong kara neonate yee uA) 1,9 5,92 
Diskofjord..... GPA, Nl, Tey letorastilWol & 5 10 13,8 23 6,00 
Kangerdluarssuk 67°58’, E. Porsild........ 10 10,4 ee 6,02 
Diskofjord..... 69229 2s Mose Porsildeeracr 10 —-:16,0 2,3 6,09 
Uvkusigssat ... 72°18’, K. J. V. Steenstrup 6 11,8 13 6,21 
TsontOoqm seta Gal, do NWellcoc edaacae Gales 21 6,24 
Laksefjord..... 72°31’, Th. & M. P. Porsild 10 14,6 2,3 6,27 
Skanseneaenee 69225 eu iai Pane onsil diem OT 1,8 6,36 
Ikentoqpecreccde: 6645 eI" Mahler sn o- ae lS) 2,0 6,50 
Jakobshavney O90 gla ebm cella see 6 13,2 2.0 6,60 
Holsteimsborg .: 66°56’, J. Vahl.......... 53) 2,0 6,75 
ANGI [5 Go one 68248 ee Ps Porsildiies- 10 2033 113) 6,75 
Godthaab ..... Geb, J, WAS so odaoe Tale) DS 6,80 
Monssulkcatalk. 24) 109200) SLOW. any tenses eee (oe alee! 1,9 7,02 
Wmamatsiag <4. 20°8b’, JeVablit Joe cet e120 ily 7,06 
