Igog. No. 8. VASCULAR PLANTS COLLECTED IN ARCTIC NORTH AMERICA. 57 
We have no specimens of this species in the Copenhagen herbarium, 
but the material of the Gjöa Expedition is on all points like the drawing 
by Hooker (I. c.) and agrees exactly with his description. 
75. Saxifraga Nelsoniana D. Dox, Trans. Linn. Soc., 13, 1822, 
P- 355; PIPER, Contr. U.S. Nat. Herb. XI, 1906, p. 314; Micranthes Nel- 
soniana SMALL, N. Am. Fl. 22,2, 1905, p. 146; S. punctata KJELLMAN, 
Vega Exp. vetensk. Arb., II, 1883, p. 42; ? Eastwoop, Bot. Gaz., 33, 
1902, p. 201 (non LINNÆUS); ? S. fuberosa STERNB., Suppl. Revis. Saxifr., 
H, 1831, p. 8, pl. 12. (See pl. I, fig. 7.) 
King Point. In bloom in the last days of June (2oth—28th) 
and the first days of July (3rd—4th) of 1906. 
Herschell Isl. In bloom on July 17th, 1906. 
The species of the punctata-group-are rather difficult to separate, and 
many mistakes probably have been made. The present plant agrees in 
all points with the description of S. Ne/soniana by J. K. SMALL, and I think 
the naming is quite correct. 
76. Saxifraga hirculus L., Sp. pl, 1753, p. 402; Leptasea hirculus 
SMALL, N. Am. F1, 22,2, 1905, p. 152. 
PuLten’s list, Point Barrow to Mackenzie River. 
Herschell Isl. In bloom July 17th, 1906 and with emptied cap- 
sules from 1905. 
The specimens belong to var. propinqua (R. Br.) Sri. (cfr. above 
p- 23), but have unusually large petals (ab. 9 mm.). 
In North Am. Flora, Vol. 22,2, 1905 J. K. SMALL describes (p. 152) 
a Leptasea alaskana n. sp. from Pt. Barrow, which comes near to S. hr- 
culus, var. propinqua, but is said to have smaller petals (5,5—6,5 mm.) 
with a claw-like base. I think this may be considered a mere variety of 
S. hirculus. 
77. Saxifraga tricuspidata RoTTB., Skr. Kiöbenhavn Selsk. Lærd. & 
Vidensk., vol. 10, 1770, p. 446, tab. 6, fig. 21; Leptasea tricuspidata Haw.; 
SMALL,:N. Am. Fl., 22,2, 1905, p. 154. 
King Point. In bloom at the beginning of July (7th, 1906). 
Empetraceae. 
Empetrum L. 
78. Empetrum nigrum L., Sp. pl., 1753, p. 1022. 
PuLten’s list, Richard's Isl. 
King Point. Only a single branch without flowers and fruits has 
been collected (July 1906). 
