:903j Sargent,— Recently Recognized Species of Crataegus 185 
slender, grooved, more or less wing-margined toward the apex, 
glandular with minute dark red glands, 1.5-1.8 cm. in length. 
Flowers 8-10 mm. in diameter on short slender pedicels, in compact 
mostly 6-7-Howered thin-branched sparingly villose compound 
corymbs; bracts and bractlet linear, acuminate, bright red, mostly 
deciduous before the opening ofthe flowers; calyx-tube narrowly 
obconic, lizht green, the lobes narrow, red at the acuminate apex, 
tipped with bright red glands, finely serrate or nearly entire, pubes- 
cent on the inner face, reflexed after anthesis; stamens 5—7, usually 5 ; 
anthers large, magenta; style 2—4, usually 3. Fruit on bright red 
elongated glabrous pedicels in drooping clusters, oblong to slightly 
obovate, full and rounded at the apex, gradually narrowed to the 
base, bright scarlet, lustrous, marked by occasional large dark dots, 
about 1 cm. long, 7-8 mm. wide; calyx prominent, with a short tube, 
a broad deep cavity and reflexed and closely appressed lobes pubes- 
cent on the upper surface, usually persistent; nutlets generally 3, thin, 
acute at the ends, prominently ridged on the back with a broad often 
grooved ridge, the ventral pits broad but shallow, about 6 mm. in 
length. 
A shrub or small tree sometimes 3 m. in height: with a slender 
stem occasionally 1 dm. in diameter, covered with ashy gray bark 
scaly toward the base, slender erect branches and thin nearly straight 
branchlets marked by a few large pale lenticels, light orange-green 
when they first appear, bright red or red-brown and lustrous during 
their first and dark gray-brown during their second year, and unarmed 
or sparingly armed with short stout light chestnut-brown shining 
spines. Flowers during the first week of June. Fruit ripens early 
in October. 
Nova Scotia: Lock Broom, near Pictou, Zsa?e//e McCabe, June 
and October 1902; Rustico, Pictou County, C. B.. Robinson and 
Florence Scott, June 1902. 
One of the most distinct of all the species belonging to this dif- 
ficult group and well characterized by its small thin nearly glabrous 
leaves with very slender midribs and veins, small flowers with few 
stamens, oblong or obovate fruits, and by the unusually shallow 
cavity on the ventral faces of the nutlets. Received with numerous 
other forms of northern Nova Scotia from Mr C. B. Robinson, 
Science Master of the Pictou Academy for whom it is named. 
Crataegus aquilonaris, n. sp. Leaves ovate to oval, acuminate, 
broadly cuneate or rounded at the entire often oblique base, sharply 
and often doubly glandular-serrate, and slightly divided into numerous 
short broad acuminate lobes; nearly fully grown when the flowers 
open and then light yellow-green and covered with short lustrous 
