332 EuG. Warming. 



land. In the Greenland specimens I found flowers formed 

 the year previous to that in which they were to open. In 

 specimens gathered on May 10th, 1887, by Lieut. Ryder, 

 near Upernivik, young flowers, about V2 ^^^'^ ^^ diameter, 

 were found far down among the leaves. (See p. 282, Fig. 24). 



Greenland. Trioecism: ^, (S and ?; as ? sets fruit, 

 we have here evidence of insect-pollination. I have not seen 

 5 flowers, but Lange mentions them in "Conspectus Floræ 

 Groenlandiæ" on the authority of Vahl. 



3 are > 9 (Fig. 44, A, B, C), which is especially seen 

 in the length of the petals and in the diameter of the corolla. 

 In 6* the petals are 8 — 10 mm, in $ 5^/2^ — 6^/21 of which the 

 «laws are about 4 mm long and the limb scarcely 2 mm (see 

 Fig. D, E, F). The calyx tube is generally larger in 3 (5 — 

 7 mm) than in $ (4 — 5 mm). The corolla-tube in <$ is 6 — 

 ßVa mm, in $ 4- — ö^/g mm, the diameter of the corolla in (J 

 is 7 — 11 mm, in $ 6 — 8 mm (see Fig. A, B, C). S has always 

 a small pistil with styles 1^/3 — 2 mm in length, which I have 

 not seen grow and separate (Fig. i)), as they do in the Alps 

 according to H. Müller. There are shrunken ovules, the inte- 

 guments of which are however formed. The cal.-st. are the 

 first to develop, then the cor.-st. The styles have at the top 

 some very short stigmatic papillæ, which never grow longer 

 than those shown in Fig. D. 



$ flowers have always rudiments of stamens, but in vari- 

 ous degrees of development; in some cases they are as much 

 as 2 mm long, and have distinctly marked-off anthers (Fig. 

 E^ std), which are however shrunken, transparent and devoid 

 of pollen; in other cases they have still shorter stamens, and 

 the anthers are hardly indicated (Fig. F). Correspondingly 

 with this there appears to be a different degree of develop- 

 ment of the size of the flowers, the size of the petals, and the 

 degree of development of the stigmatic papillæ, so that the 



