Loew, E., 1894, Blütenbiologische Floristik der mittleren und nördlichen 
Europa sowie Grönland. Stuttgart. 
SCHRÖTER, C., 1904—1908, Das Pflanzenleben der Alpen, eine Schilderung 
der Hochgebirgsflora. Zürich. 
LANGE, JoH., 1880, Conspectus Flore Groenlandice. (Meddelelser om Gren- 
land, Vol. 3.) 
— 1887, Tillæg til Grønlands Fanerogamer og Karsporeplanter. (Ib.) 
KOLDERUP ROSENVINGE, L., 1892, Andet Tillæg til Grønlands Fanerogamer 
og Karsporeplanter. (Meddelelser om Grønland, Vol. 3, pp. 647—749.) 
Ord. Hricacew. 
Ledum palustre L. 
with f. decumbens Ait. and f. groenlandica (Oed.). Lance, Con- 
spectus, p. 89. 
Kıerıman, 1883, p. 505. Warning, 1884, pp. 45, 47, 101. 1885, 
p. 189, fig. 12, 13; p. 205. 1886b, pp. 118, 125; 1886—87, p. 110. 
Porrius, 1903, p. 43. Haczunn, 1905, p. 28. Syrven, 1906, p. 133, 
tab. IX. 
Material from West Greenland and Finmark. 
A low shrub, in favourable localities attaining a height of 
as much as 1 m.; in the Arctic regions often found as a dwarf 
shrub (usually forma decumbens) with prostrate branches, and 
almost hidden by moss and lichens. The lower part of the stem 
is prostrate and curving, forming many, usually very slender 
roots; offshoots may be produced, but propagation by seed 
appears to be its normal mode of reproduction. 
| have not observed runners er stolons with scale-leaves; 
the growth of the primary root appears to be very strong, and 
according to Hacıusp a great number of branches arise more 
or less irregularly from the base of the primary shoot. 
The foliage-leaves remain green two (or three) years; the 
under sides are densely covered by woolly hairs of a rusty 
colour. The margins are more or less revolute (Fig. 1). The 
size of the leaves, both as regards breadth and length varies 
