1900. No. 8. VASCULAR PLANTS COLLECTED IN ARCTIC NORTH AMERICA. 37 
‘King Point. In flower on July 4th 1906 (flowers rose); speci- 
mens with old flowers, but without developed fruits were collected on 
Sept. 3rd, 1905. 
Herschell Isl. In flower on July 17th, 1906. 
I fully agree with KJeELLMAN (Vega Exp. vetensk. arbeten, II, 1883, 
p. 50) in taking the specimens from arctic N. W. America as P. bistorta; 
they closely resemble the arctic-asiatic plant, which again is not different 
from the true P. bistorta of Europe. As far as I can judge from the 
description, the new species described by J.K. SMALL. (l. c.) is just 
our plant. 
Specimens of true P. bistortoides PursH from Colorado, Wyoming and 
Chilliwack Valley (Lat. N. 49°), seen by me, differ in many respects from 
the present plant and show that P. bistortoides is a well marked species. 
Carvophyllaceae. 
Melandrium RüxL. 
26. Melandrium affine J. VAL, Fl. Dan., fasc. 40, 1843, p. 5; M. m- 
volucratum (CHAM. & SCHLECHT.), 3, affine ROHRBACH. 
King Point. In full flower in the last days of June and in July 
(June 29th, July 4th—oth, 1906). 
Silene L. 
27. Silene acaulis L., Sp. pl., ed. 2, 1762, p. 603. 
Putten’s list, Point Barrow to Mackenzie River. 
King Point. Flowering in July 1906 (GoDFRED HANSEN). 
Alsine WAHLENB. 
28. Alsine verna (L.) WAHLENB., Fl. Lappon., 1812, p. 129. 
King Point. Flowering specimens were collected as early as 
June 20th, 1906 (further June 29th, July 7th). They may be referred to 
f. rubella (WAHLENB.), but stalks, stems and partly also leaves are glan- 
dular. Other specimens from July are higher, with more diffuse growth 
and the stems bear 1—3 flowers; they may be called f. hirta (WoRMSK3.) 
(collected by GopFreD HANSEN). 
29. Alsine macrocarpa (PursH) FENZL, Verbr. d. Alsineen, in tab. ad 
p. 18, 1833; Arenaria macrocarpa PursH, Fl. Americ. Septentr., I, 1814, 
p.' 316. (See.pl.I, fig. 1.) 
