(1865) p. 383, no. 50. Aster dauricus (DC.) Benth. ex Baker Gard. Chron. (1885) I, 

 p. 208. 



Near Ust Algiac, on the Sisti-kem. Nearly done flowering in the early days of 

 August. 



Distribution: Through southern Siberia and northern Mongolia, from the Sayansk 

 district, eastwards to the Amoor Province and Manchooria. » 



Erigeron acer L. Spec. PI. ed. II (1763) p. 1211; Ledeb. Fl. Alt. IV, p. 89; Turczan. 

 Cat. Baical. no. 594; Ledeb. Fl. Ross. II, p. 488; Turczan. Fl. Baical.-Dahur. (1846) p. 

 158, no. 581; Herder, PI. Radd. (1865) p. 390, no. 61, p. p.; KptM. c&j. Ajit. ill (1904) p. 593. 



Rather frequent in the Urjankai country, especially on dry hills, in thickets, and the 

 like, at Ust Algiac, Ust Sisti-kem, Ust Kamsara, and on dry flood-plains at Ust Tara- 

 kem. Collected in July and August. 



Distribution: Throughout Europe, Caucasia and south-western Asia, Siberia, in the 

 Yenisei valley northwards to 71° 20' north lat., northern Mongolia, eastern Asia, Nortli 

 America. 



Erigeron elonga(us Ledeb. Fl. Alt. IV, p. 91; Turczan. Cat. Baical. no. 595; Ledeb. 

 Fl. Ross. II, p. 487; Turczan. Fl. Baical.-Dahur. (1846) p. 158, no. 582. E. acris L. y elonga- 

 tus (Ledeb.) Krylow, $ji. Ajit. Ill (1904) p. 594; Herder, PI. Radd. (1865) p. 391, 

 no. 61. 



The material collected differs from the Scandinavian specimens I have had for com- 

 parison, by having the achenes rather densely beset with comparatively long, appressed 

 hairs, while the Scandinavian ones have the fruits glabrous or nearly so, at any rate only 

 at the summit slightly puberulent. The bracts of the involucre are glabrous or mostly 

 very finely and slightly puberulent, of a green colour, with violet summits. The pappus- 

 bristles white or slightly yellowish. 



Scattered in the subalpine wooded tracts of the Sayansk district, about the Upper 

 Amy], where collected by me in flower and with young fruits in the first half of July. 



Besides, I have collected near Ust Algiac, in the subalpine wooded tracts, some 

 specimens differing in various respects. The stem is long and slender, slightly sulcate, 

 green, completely glabrous below, only very sparingly pubescent above. The leaves are 

 narrow, to 5 mm. broad; the lower ones linear-lanceolate, gradually tapering towards 

 the base, obtusely rounded or slighfly acuminate at the top, ciliate, completely glabrous 

 for the rest. The margin of the leaves is even and entire, never denticulate or incised. 

 The upper leaves narrowly lanceolate, tapering towards the top, and subacute. The 

 raceme is especially characterized by its few and comparatively small heads, the pedunc- 

 les of which are 3 — 5 cm. long, always unramified, each of them, accordingly, bearing 

 one single head, reaching up to different heights. The heads are few, numbering only 

 6 — 8, and are distinguished by being comparatively small, scarcely exceeding 1 cm. in 

 diameter when pressed; the involucre is campanulate, not hemispheric or spreading; its 



415 



