Scrophulariaceae. 377 



distributed on both surfaces of the leaf, I found them how- 

 ever (contrary to Wagner's statement) to be slightly in the 

 majority on the lower surface; the absolute number per 

 square unit proved, however, to vary somewhat, but I did 

 not succeed in finding any fixed rule as regards this point. 

 The stomata are on a level with the surface of the leaf. 



One of the non-glandular hairs occurring on the leaf- 

 margin and the under-side of the midrib is shown in Fig. 4,jp; 

 they are 2 — 4 celled, thick-walled and have cuticular warts 

 on the surface. Glandular hairs with a one-celled stalk and 

 two-celled head occur in great numbers and are equally 

 abundant both on the upper and the lower surface of the 

 leaf (Fig. 4, A and B). A transverse section discloses 2 — 3 

 layers of short and broad palisade-cells with rather large 

 intercellular spaces; the spongy parenchyma consists of ovate 

 to slightly branched cells; all the cells of the mesophyll are 

 abundantly filled with chlorophyll-grains. Palisade tissue and 

 spongy parenchyma are shown in surface view in Fig. 4, 

 C and D. The mid-rib has on its under-side a thin layer 

 of stereom. 



Veronica alpina L. 



Alcohol-material from Norway (Tromso, leg. E.Warming, 

 21. 7. 1885; Muggrubskampen, Rorås, leg. Th. Resvoll, 

 29. 7. 1918) and Greenland (Nunatsuk, 11. 8. 1885; Ivigtut 

 and Dronning Louises 0, leg. P. Eberlin, 21. 8. 1883 and 

 8. 8. 1885). — Herbarium-material from Greenland, Iceland, 

 the Færoes and Fennoscandia. 



Lit.: AxELL, 1869, p. 102; Lange, 1880, p. 72; 1887, p. 261; 

 Muller, 1881, p. 270; Lindman, 1887, p. 81; Warming, 1888, pp. 31, 

 35, 39, 75, 87, 93 and 142; 1890, p. 204; Rosenvinge, 1892, p. 685; 

 1896 (II), pp. 128, 161, 168; Wagner, 1892, pp. 9 and 20; Hartz, 1894, 

 pp. 9, 49, 50 and 57; 1895 (I), pp. 137, 170, 179, 266, 271, 288 and 304; 

 1895 (II), p. 335; Hartz and Kruuse, 1911, pp. 346, 359, 364, 409, 417 

 and 423; Jungner, 1894, p. 275; Koch, 1895, pp. 117 et seq. and 



