52 Rhodora : [FEBRUARY 
Scapania undulata (L.) Dumort. Borders of Lower Basin 
Pond; on logs in Great Basin; dry brook near brow of Table- 
land. 
* Frullania Oakesiana Aust. On balsam fir, South Basin. 
Rather common. 
Hutt BOTANICAL LABORATORY, University of Chicago. 
EXPLANATION OF PLATE 44.— Fig. 1 (upper): Shelf at base of the North West 
Spur of Ktaadn, showing Lake Cowles and the larger of the roches moutonnées 
to the right; Sourdnahunk Kange to the west. 
. 
Fig. 2 (lower): Heath society on the larger of the roches moutonnées, showing 
the encroachment of spruce ; Sourdnahunk Range to the west. 
RECENTLY RECOGNIZED SPECIES OF CRATAEGUS IN 
EASTERN CANADA AND NEW ENGLAND, —I. 
C. S. SARGENT: 
SiNcE the publication in Ruopora in February and April, 19or, 
of several species of Crataegus found in the Champlain valley by 
Mr. Ezra Brainerd and other Vermont botanists, and in the neigh- 
borhood of Montreal by Mr. J. G. Jack, numerous collections of 
these plants have been made in Canada and New England. ‘These 
disclose new forms which have previously remained unrecognized. 
Some of these are described in the following papers, while others 
cannot be properly characterized until they have been more fully 
studied in the field. 
§ CRUS-GALLI. 
Crataegus exigua, n. sp. Glabrous with the exception of a few 
hairs along the upper side of the midribs of young leaves. Leaves 
mostly erect, oblong-obovate and rounded or acute at the apex, 
cuneate and entire below the middle, above and often only toward 
the apex finely serrate, with straight or incurved teeth; bright red 
when they unfold and nearly fully grown when the flowers open, at 
maturity subcoriaceous, dark green and lustrous on the upper surface, 
paler and dull green on the lower surface, 3.5-5 cm. long, 1.5-2.5 cm. 
wide, with broad midribs raised and rounded on the upper side and 
