19 



opens almost at the margin and of which the cells have un- 

 dulating walls (Fig 52, F). 



The leaf- stalk is hairy like the peduncle. The epidermis 

 contains chlorophyll and is thin-walled. The cortex has nu- 

 merous tangential schizogenous lacunae. There are three bundles 

 which upon the outer side have about three layers of flbrous 

 tissue ; their structure is otherwise almost entirely like that of 

 the bundles of the flower-stalk. Interfascicular stereom is absent. 

 The pith is more or less broken down. 



Thalictrum alpinum L. 



Lit. Lecoyer, 1878, p. 9, pi. Ill, fig. 28. Lindman, 1887, pp 

 18, 44, 101. Lange, 1888, p. 53. Rosenvinge, (1), 1892, p. 675 

 Børgesen, 1895, pp. 236, 37, fr. res. p. 7. Hartz, 1895, (II), p 

 289. Norman, 1895, p. 37. Ekstam, 1897, p. 148. Gleve, 1901 

 p. 50. Düsen, 1901, p. 29. Skottsberg, 1901, p. 16. Freidenfelt 

 1904, pp. 49, 50, pi. Ill, fig. 38. 



Alcohol material from Sweden (Jemteland, 6.8.1881); 

 the Færoes (Kirkebö); Iceland (Havnefjord, 4.7.1894, unknown 

 loc, 15.5.); Greenland (Kobbefjord, 29.6.1884, Godhavn, 26.7. 

 1884). 



This plant, as also Coptis trifolia, has a subterranean rhi- 

 zome which is horizontal or somewhat slanting, is slender, has 

 elongated internodes and bears scale-leaves in a spiral. This rhi- 

 zome will afterwards bend upwards with its apex; its internodes 

 will become short; it will pass the winter with a bud covered 

 with scale-leaves which will next spring produce one or several 

 long-stalked foliage-leaves. Perhaps the axis may develop further 

 and produce an inflorescence. The flowering axis often bears 

 halfway up a short-stalked foliage-leaf of the same nature as 

 the basal leaves. Small oval bracts subtend the flowers in the 

 racemose inflorescence (Fig. 53, Ä). The principal bud occurs 

 in the axil of one of the basal leaves, and the structure of the 

 shoots is consequently sympodial. The majority of the flowering 



