nerved, of a pallid reddish violet colour, deciduous early in season. The anthers are 

 yellow, over 2 mm. long, with a pointed summit, pendent, on capillaceous filaments, 

 to 5 mm. long. The lower bracts are foliaceous, gradually decreasing in size upwards. 

 The upper ones are linear, nearly membranous, entire, or sometimes slightly toothed at 

 the base. The species begins flowering at the end of June; none of the plants in my 

 collections taken at the end of June, bearing ripe fruits. 



Distribution: Nearly all over Europe, in Asia from the Ural to Japan, northwards 

 to about the limit of conifers, southwards through Mongolia, northern China, northern 

 Corea, Africa, North America (TJnalashka). 



Thalictrum simplex L. Mantissa p. 78; Ledeb. Fl. Alt. II, p. 353; Turczan. Cat. Bai- 

 cal. no. 15; Ledeb. Fl. Ross. I, p. 10; Turczan. Fl. Baical.-Dahur. (1842) p. 33, no. 13; 

 Kegel, PI. Radd. (1861) p. 14; Regel, Uebers. Gatt. Thalictrum (1861) p. 51; Lecoyer, 

 Monogr. Gen. Thalictrum (1885) p. 204; KpBijr. $ji. Ajit. I (1901) p. 9. Thalictrum stric- 

 tum, galioides et affine Ledeb. Fl. Ross. I, p. 10. Thalictrum exaltatum C. A. Meyer in 

 Ledeb. Fl. Alt. II, p. 352. 



Very common in open grass-fields on the islets in the river Abakan, accompany- 

 ing the preceding one. Specimens belonging to this species found by me, with stems 

 attaining the height of a man, and markedly striate. The leaflets are very large, to 3,5 

 cm. long, and the breadth from y2 to % the length, generally cuneately tapering towards 

 the base, where they are rounded. The summit of the leaflets have acute, entire 

 lobes. The upper leaves are always narrower than the lower ones. The leaves are of 

 a dead green underneath, and the margin is sligthly recurved. The rootstock is fibrate, 

 not markedly creeping. The leaf-sheaths are distinct stipulate at the base. The panicle 

 is foliate, narrow, with few flowers. The specimens seemed to agree perfectly with 

 Regel's diagnosis of subspecies strictum 1. c. p. 53. (Thalictrum strictum L., Ledeb. Fl. 

 Ross. I, p. 10; Thalictrum exaltum C. A. Meyer in Ledeb. Fl. Alt. II, p. 352). In my col- 

 lections there are only specimens with young flower-buds belonging to this species, taken 

 towards the end of June in several places on islets in the river Abakan. Its flowering 

 season thus seemed to occur later than that of the preceding species. 



A great many specimens belonging to indermediate forms, probably obtained by 

 hybridization, accompanying the two last-mentioned, have been collected by me on 

 the islets in the river Abakan. The leaves are bi-or tri-ternate. In the size and shape 

 of the leaflets these specimens generally agree best with Thalictrum simplex, while, on 

 the other hand, in the spreading and much branched panicle, they resemble more par- 

 ticularly the first-mentioned species. The floweriness varies rather considerably, and 

 so does the vegetative shoot, sometimes approaching one, sometimes the other of these 

 specimens. During the flowering the flowers are erect or drooping, and in the structure 

 of each flower these specimens agree rather perfectly with Thalictrum minus, with 

 which it also agrees as to the flowering season. The panicle is more or less fohate, 

 which is a markedly intermediate character. 



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