'i20 



iiKÜvidiials in llic .ilcolutl rnatcrijil examined by me liad only basal 

 leaves and short inlernodes in the rosette of the leaves, of these 

 the one next below the uppermost subtended the principal bud. 

 The subtending leaf was either a scale- leaf or a foliage-leaf 

 with a large sheath. I pon the other flowering individuals the 

 uppermost basal-leaf was [»receded by a somewhat elongated 

 internode. Perhaps the principal bud is really subtended by the 

 nppermost basal leaf upon individuals whose aerial stem bears a 



median foliage-leaf; this 

 leaf may subtend an in- 

 florescence similar to that 

 of the parent-axis. 



The rejuvenating shoot 

 develops a rosette of fo- 

 liage-leaves during the 

 same year as that in which 

 the parent- axis flowers, 

 and produces during au- 

 tumn a winter-bud protec- 

 ted by scale-leaves. The 

 leaves are long-stalked and 

 pinnate or bipinnate, with 

 opposite, stalked primary 

 segments, and broadly 

 ovate, glistening, glabrous leaflets that are bluish-green upon 

 the lower surface and of which the edges are revolute. 



The vertical part of the rhizome, may, in addition to the 

 principal bud, also produce other ascending rosette-shoots and 

 scale-bearing rhizomes; some however are met with that bear 

 foliage-leaves upon elongated internodes, probably due to the 

 fact that the rhizome has been lying close to the surface. The 

 horizontal rhizome may give off branches. From the vertical 

 rhizome arise strong, brown, branching roots, the cortex of 

 which is wrinkled and rough on account of the secondary growth; 



Fig. 53. Thalictrum alpinum. 



A, Young inflorescence (Kobbefjord; 29.6.1884; 

 about '/i). B, Flower which has not yet expan- 

 ded (ibidem; about ^"/i). C, Carpel from expan- 

 ded flower (Jemteland: June, 1881; about '-/i). 

 D, Stamen (Kobbefjord; 29.6.1884; about s^/i). 

 {A, li and D were drawn by E. Warming). 



