176 Fr. J. Mathiesen. 



somewhat depressed areas between the 5 chief veins; here 

 the outer epidermal walls show fine cuticular striations. 

 The margins of the calyx-lobes are covered with glandular 

 hairs, the form of which is illustrated (fig. 5, d and e) ; the 

 globular or club-shaped head is always filled with a brown 

 substance. The cells of the mesophyll are somewhat axially 

 elongated and are amply provided with chlorophyll granu- 

 les, which also occur in the epidermis of the outer surface. 

 There is a distinct difference between the epidermal cells 

 on the upper and lower surface of the limb of the corolla. 

 The outer walls of the upper side are strongly arched and 

 papillose, with cuticular striations radiating from the top of 

 each papilla. In the throat these papillae become very 

 large, and their contents have here a strong brown colour. 

 On the lower surface of the limb of the corolla, the epidermal 

 cells are somewhat cupola-shaped, the lateral walls being 

 provided with ridges at right angles to the outer walls (fig. 

 5, g). Similar ridges are also present in the epidermis of 

 the upper surface, but much less pronounced in character, 

 especially near the throat (fig. 5, /). 



Primula sibirica J acq. 



Lit.: Flora Danica, t. 188 and t. 1809. Warming, 1886 a, 

 pp. 25, 26, 27; 1886 b, p. 21. Widmbr, 1891, p. 119. Decrock, 

 1901, p. 98. Pax and Knuth, 1905, pp. 76, 77. Blytt, 1906, 

 p. 569. 



Alcohol material, collected by E. Warming, from Norway, 1885 

 (Alten, Bosekop and Kåfjord). Herbarium material from the same places 

 and also from Hammersfest (Vahl), the shores of the White Sea 

 (Angström 1843), Lapponia Imandrae (Brotherus, 1885) and Kola 

 (Brotherus, 1889). 



The following observations were made in addition to 

 what is stated by Warming and Widmer as regards the 

 morphology of Primula sibirica: 



The leaves in the rosette appear to be arranged in a f 

 spiral, as is the case with Pr. egaliksensis, but 3 — 5 of the 



