The specimens collected agree perfectly with European material, save for the 

 outer involucral bracts being more numerous, 5—9, and nearly of the same length as the 

 principal ones, while the typical plant has only 2—3 outer involucral bracts, only one 

 half of the principal ones in length. My material is too scarce to enable me to settle defi- 

 nitely the systematical value of this character. Leaves and young, flowerless specimens 

 of this plant are pretty common in thickets, etc., on islets in the rivers Yenisei and Aba- 

 kan. Specimens with young flowers have been collected by me near Ust Abakansk in 

 the last days of June. 



Distribution: Europe, except the extreme north and south, Caucasia, south-western 

 Asia to Turkestan, Siberia, eastwards to the Amoor Province, northern Mongolia, north- 

 ern China. 



Senecio nemorensis L. Spec. PI. ed. II (1763) p. 1221; Ledeb. Fl. Ross. II, p. 641; 

 Herder, PI. Radd. (1867) p. 434, no. 157; KpBM. $ji. Ajit. Ill (1904) p. 675. S. octoglossus 

 DC. Prodrom. VI, p. 354; Karel. et Kiril. Enum. PL Fl. Alt. no. 489; Turczan. Fl. Baical.- 

 Dahur. (1847) p. 19, no. 644. S. obscurus Turczan. Cat. Baical. no. 656. 



The specimens I have collected of this very polymorphous species, differ in various 

 respects from the typical form, and I enter them as 



subspec. macer DC. 1. c. [Tab. XIV, Fig. 1]. 



The systematism of the immense genus Senecio, perhaps especially within the group 

 of Sarracenici, is very troublesome, and the many species, with their numerous varieties 

 and forms, combine the systematic characters in such a way that it is very difficult to 

 decide where a systematically well grounded line between the several types should be 

 drawn. 



In point of external habitus, the variety at hand differs by its few, but comparatively 

 large heads, always forming a single corymb, whereby — as regards the structure of the 

 flower cluster — somewhat approaching S. paluster, from which, however, it is distinct 

 by its broader leaves, on both sides completely glabrous or nearly so, further, by the 

 straight teeth of the leaves, comparatively smaller heads, a white pappus, and also by 

 fewer and longer outer involucral bracts. In the typical form of S. nemorensis, the flower 

 cluster is, on the contrary, compound, the peduncles bearing umbels or new corymbs. 

 The heads are, accordingly, single on the branches of the corymb, comparatively large, 

 erect, but few, only 3—4 or 5 in number. The involucre is campanulate, 6—8 mm. long, of 

 about the same breadth or even broader, while, in the typical plant, the involucre is re- 

 corded to be nearly twice as long as broad; my material of comparison of S. nemorensis 

 a typicus, however, proves to be somewhat varying as to this character. The principal 

 bracts are 12—15 mm. long, about 1 mm. broad, finely pubescent and ciliate, tapering 

 to a point at the top. Their extreme tips are generally of a light colour, and below this 

 hght tip itself frequently furnished with a narrow, darker ring; sometimes, the whole sum- 

 mits of the involucral bracts are of a dark colour. The outer involucre consists of 2 5 



very narrow, cihate, green, linear bracts, pointed at the summit, commonly only 0,5 mm. 



42.S 



