1914] Fernald & Macbride,— Artostaphylos Uva-ursi 211 
that of the eastern glabrous type; but in its pubescence the western 
plant is so clearly distinguishable that it is worthy separation as a 
geographic variety which may be called 
MAIANTHEMUM CANADENSE Desf., var. interius, n. var., plus 
minusve pilosum.— ONTARIO: Mungo Park Point, Lake Nipigon, 1912, 
H. E. Pulling. Mantrosa: Lake Winnipeg, Richardson; Observation 
Point, Lake Winnipeg, July 23, 1884, J. Macoun; Winnipeg Valley, 
1859, Bourgeau. SASKATCHEWAN: Carleton House to Cumberland 
House, July, 1827, Drummond. ALBERTA: Strathcona, June 21, 1903, 
M. A. Barber, no. 189. Sours Dakora: Piedmont and Little Elk 
Creek, alt. 4000 ft., June 27, 1892, Rydberg, no. 1043 (TYPE in Gray 
Herb.) Iowa: Fayette, May, 1894, B. Fink. WiscowsiN: Brown 
County, June 22, 1892, J. H. Schuette. Iturots: Fountaindale, 
Winnebago County, 1870, “a rare plant with us," M. S. Bebb; Starved 
Rock, La Salle County, June, 1909, Greenman, Lansing, & Dixon, no. 
34; Lake Villa, August 3, 1906, Gleason & Shobe, no. 103; Chicago, 
H. A. Warne. 
GRAY HERBARIUM. 
THE NORTH AMERICAN VARIATIONS OF 
ARCTOSTAPHYLOS UVA-URSI. 
M. L. FERNALD AND J. FRANCIS MACBRIDE. 
ARCTOSTAPHYLOS Uva-unsi, as it occurs in North America, seems 
to fall into three somewhat pronounced geographic variants differing 
primarily in the pubescence of the branches. The shrub which most 
clearly matches the European material has the very young branchlets 
minutely tomentulose and commonly somewhat viscid, but soon loses 
its pubescence. "This typical form of the species is less common in 
North America than one of the others, but occurs in characteristic 
aspect from Greenland to Newfoundland and Quebec, and from the 
Bering Sea region locally southward to the Black Hills, New Mexico 
and Washington. This is the shrub described by Klotzsch as Daph- 
nidostaphylis Fendleriana Klotzsch, Linnaea, xxiv. 80 (1851), and 
although the Fendler material is more glutinous than most of the 
European material, it is well matched by a sheet of specimens from the 
Pyrenees. 
