27 
but persist in a decaying and colourless condition for many 
years (Fig. 17 C). 
The flowers occur laterally upon the lower part of the 
year’s shoots; each has four bracteoles at the base of its stalk 
(Fig. 18 C; Fig.16 D). They are obdiplostemonous and the 
carpels are antipetalous. They are formed during the year 
previous to that in which they open, and pass the winter in a 
fairly well-developed condition (Fig. 16 D, E; Fig. 17 C). 
The same shoot may flower 
several years in succession 
(Fig. 16 G). 
The corolla is yellowish- 
white and emits a perfume, 
which recalls that of the Lily 
of the Valley (Convallaria ma- 
jalis), but ‘is not powerful, 
and is strongest in the evening. 
t is bell-shaped and nods with 
down-turned throat on its Fig. 17. Cussiope tetragona. (From 
curving stalk (Fig. 17). Its West Greenland). 
= a 5 ee A, A branch with flower; g, new lateral shoot: 
length is from 7 to 8 (8 9) mm. B, The same in transverse section. C, A branch 
The length of the pistil is recently cleared of snow (July 12, 1884); the 
dark leaves are dead. (E. W., 1885.) 
about */4 of that of the corolla, 
and the stigma is situated almost at the throat (Fig. 18 A). The 
anthers, as illustrated in Fig. 18 A, stand at about the middle 
of the corolla. The filaments are only slightly thicker at their 
bases than at their apices (Fig. 18). The anthers are black; 
their pores are elongated, turned upwards, and are open even 
in the bud. The appendages which are long and slender, are 
covered with small, stiff hairs (Fig. 18 5); they spread hori- 
zontally from the anthers and reach well towards the sides of 
the corolla, so that an insect on thrusting its proboscis into 
the latter in search of the honey which is secreted by the 
yellowish-coloured disk below the ovary (Fig. 18 A, D), must 
