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

 Siberia, noillnvards to 68!:;" noilli latitude and eastwards to Kamtchatka and the Amoor 

 Province, Manchooria, northern China, Mongoha, Tibet, tlie Himalayas, Japan, Sakhalin, 

 North and South America, Greenland, Australia. 



Sibbaldia procumbens L. Spec. PI. ed. II (1762) p. 307; Ledeb. Fl. All. I. p. 428; 

 Turczan. Cat. Baical. no. 433; Karel. et Kiril. Enum. PI. Fl. Alt. no. 317; Ledeb. Fl. Ross. 

 II, p. 32; Turczan. Fl. Baical.-Dahur. (1843) p. 627, no. 424; Kpbi.i. <I'.i. A.tt. 11(1903) p. 363. 



Pretty common in the Altaian, in dry, gravelly places, etc., where I have met with 

 it in subalpine wooded tracts (at an altitude of 900 m. above sea-level, on the Upper 

 Sisti-kem), together with Betula roliindi/olia. and right up to the perennial snow. Speci- 

 mens taken in sulialpine tracts, bearing nearly ripe fruits at the end of July. These last- 

 mentioned ones are distinguished by a moi'e luxuriant growth, and generally have com- 

 l)aratively long peduncles, overtopping, or, at any rate, equalling the leaves, .\scherson et 

 Graebner, Synops. VI. I (1904) p. 662, record the range of this species only to comprise 

 Europe, referring the Asiatic one to a nearly allied species S./ja/7'//7o/Y/WH,Ln.Neue Schr. 

 Naturf. Fr. Berlin, II (1799) p. 125. My material from northern Mongolia agrees per- 

 fectly, at any rate, even in detail, with specimens of the typical S. procumbens from Scan- 

 dinavia, and can l)e separated in on respects from these. In Fl. Ross. II, p. 32. Ledebolr 

 also refers S. parviflora as a synonym under 5. procumbens, and this species is also 

 entered byTrRCZ.\NiNOW in Fl. Baical.-Dahur., the classical work on eastern Siberia. The 

 specimens taken by me in more elevated localities, are, in comparison with the above- 

 mentioned material from subalpine tracts, as might have been expected, on tlie whole less 

 luxuriant, more densely tufted, with smaller and more shoiily petioled leaves, shorter 

 peduncles, and sometimes with smaller flowers, which, however, at the highest, only entit- 

 les to enter these somewhat reduced specimens as a habitat modification. By minute 

 dissections and comparisons I have found that the variations of my Mongolian speci- 

 mens at large are within the limits of the Scandinavian material, and that the typical 

 Sibbaldia procumbens therefore, no doubt, also occurs in Asia. 



Distribution: Arctic and alpine tracts of Europe, arctic Siberia, the Altai and 

 Sayansk regions, northern Mongolia, Russian Turkestan, the Himalayas, Tibet, North 

 America. 



Sibbaldia adpressa Bunge in Ledeb. Fl. All. I. p. 428; Bunge, Enum. .Ml. p. 17; Tur- 

 czan. Cat. Baical. no. 434; Ledeb. Fl. Ross. II, p. 33; Turczan. Fl. Baical.-Dahur. (1843) 

 p. 628, no. 425; Kpbi.i. $.1. A.ir. II (1903) p. 364. 



On dry cliffs on the Abakan Steppe. Nearly past flowering in the middle of June. 



Distribution: Southern Siberia (the eastern Altai, estwards to Trans Baikal^ Mongolia. 



Chamaerhodos erecta Bunge in Ledeb. Fl. Alt. I, p. 430; Turczan. Cat. Baical. no. 

 437; Karel. el Kiril. Enum. PI. Fl. Alt. no. 316; Ledeb. Fl. Ross. II. p. 33; Turczan. Fl. 

 Baical.-Dahur. (1843) p. 630, no. 427; Ki.li.i. «>.t. A.it. II (1903) p. 360. 



290 



