258 



incision of the brim of the calyx to its point. L. ßr. is the length 

 of the corolla divided by its breadth when dried and compressed; 

 only totally stretched corollas have been measured. 



It is seen that the breadth of the corolla is varying indepen- 

 dently of the length of the denticles of the calyx and the form and 

 indentations of the leaves. Especially the form of the leaves is 

 very dependent on the habitat. Shade produces broad dentate 

 leaves, a free habitat narrow entire leaves, but not even these two 

 characters are varying in a parallel way. This has besides, been 

 stated abready by Goebel in 1895^) and later on by Familier^). 

 It seems as if these shade loving forms are flowering late in the 

 year and sometimes have broad corollas. 



Fam. 27. Compositae. 



97. Taraxacum croceum Dahlstedt. 



G. Andersson och H. Hesselman: Bidr. t. kännedomen om 

 Spetsbergens och Beeren Eilands Kärlväxtflora. Bih. t. K. Sv. 

 Vet.-Akad. Handl. Bd. 26. Afd. 111. No. 1, p. 12. Taraxacum 

 officinale Web. Lge. Consp. Fl. Groenl. p. 94 & 270, Berlin 

 Kärlväxter p. 44, Hartz Fanerog. p. 392. 



The leaves, 5 — 12, are lingulate, 5 — 33 (as a rule 10) ctm. 

 long, at the top 1 — 1,5 ctm. broad, more or less deeply lobate 

 dentate or slightly and remote sinuate dentate. The denticles wry. 

 The point of the leaf round or pointed. The leaves green, glabrous 

 with purple midnerve. 



1 — 4 peduncles, 10 — 60 (as a rule 20) ctm. long, the heads 

 2 — 2, 5 ctm. in diameter. The flowers yellow, the marginal flowers 

 1,75—2 mm. broad with a broad reddish purple or bluish purple 

 stripe on their outer sides, running out into three middenticles. 

 Style and stigma saffron coloured. Outer phyllaries protruding, 

 5— 6 mm. long and 1,5— 2 mm. broad with white or reddish purple 

 edges and rough brownish purple point. Inner phyllaries linear, 

 1 ctm. long, 1 mm. broad; at the point contracted to a brownish 



') Ueber die Abhängigkeit der Blattform v. Camp. rot. v. Lichtintensitiit. 



Sitzungsb. d. bayr. Akad. d. Wissensch. 1895 p. 331. 

 -) Flora Bd. 87, 1900 p. 95. 



