In humid, grass-grown places in the taiga on the Upper Sisti-kem; flowering and 

 past flowering at the end of July. 



Distribution: Middle Europe, Caucasia and south-western Asia, southern Siberia to 

 about Yakutsk, northern Mongolia. 



Pleurogyne rotata (L.) Griseb. Gentian. (1839) p. 309; Ledeb. Fl. Ross. Ill, p. 71; Tur- 

 czan. Fl. Baical.-Dahur. (1849) p. 334, no. 796; Herder, PI. Radd. (1872) p. 463, no. 134; 

 KpBiJE. «>jt. Ajit. Ill (1904) p. 856. G. sulcata Willd., Ledeb. Fl. AU. I, p. 290; Turczan. Cat. 

 Baical. no. 169. Swertia rotata L. Spec. PI. ed. II (1762) p. 328. 



In meadows near Tagarski osero, and in the Urjankai country, rather common 

 about the Upper Bei-ltem, near the Dora Steppe, the Kuree, and at Ust Tara-kem, where 

 I have collected it in grassy, sometimes slightly moist places in brush-wood, etc., in full 

 flower in August. 



Distribution: North-eastern Europe, Siberia to Kamtchatka and the Amoor Pro- 

 vince, northern Mongolia, northern China, Japan, North America, and Greenland. 



Anagallidium dichotomum (L.) Griseb. Gentian. (1839) p. 312; Karel. et Kiril. Enum. 

 PI. Fl. Alt. no. 592; Ledeb. Fl. Ross. IIL p. 72; Turczan. Fl. Baical.-Dahur. (1849) p. 336, 

 no. 798; Herder, PI. Radd. (1872) p. 466; no. 1.36; KpM. cDji. Ajit. HI (1904) p. 858. Swertia 

 dichotoma L. Amoen.Acad. II, p. 317; Ledeb. Fl. Alt. I, p. 291; Turczan. Cat. Baical. no. 787. 



The material collected is rather varying, but seemed to be separable into 2 forms, of 

 which one is distinguished by a vigorous, compact growth, much branched from the base, 

 and with short internodes. The rather large leaves are 3- to 5-nerved, and the upper pedi- 

 cels generally so short that the flowers do not reach above the upper pair of leaves. The 

 leaves are, like the branches, rather stiff and appressed-ascending. The petals are of a 

 light, nearly white colour, with distinctly yellow, strongly marked veins. This form, 

 much recalls Pallas's figure in Fl. Ross. t. II, fig. A. 



The other form is distinguished by a more slender and delicate growth, with longer 

 internodes, smaller and narrower, 1- to 3-nerved leaves. The fine pedicels are long and 

 drooping. The petals are of a greenish colour, with distinct nerves of a rather deep green. 

 These specimens are suggestive of Pallas's illustration 1. c. fig. C. For the rest, as regards 

 the colour of the flowers in this species, Pallas remarks; „Flores multo minores quam 

 praecedentis viridiores, interdum subrubentes. . ." As my material is rather scarce, I dare 

 not express any opinion on the systematic value of these characters. 



The species is scattered in grass-grown places about the rivers Yenisei and Abakan, 

 and on the islets, pailly associated with Moehringia lateriflora, Avhere collected by me in 

 full flower in the middle and at the end of June. 



Distribution: Dzungaria, southern Siberia, in the Yenisei valley northwards to 58° 

 north lat., and eastwards to Trans Baikal, northern Mongoha. 



Halenia sibirica Borkhausen, in Roemer, Archiv. I (1796) p. 25; Turczan. Cat. Baical. 

 no. 788; Ledeb. Fl. Ross. Ill, p. 74; Turczan. Fl. Baical.-Dahur. (1849) p. 341, no. 801; 



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