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1901] NORTH AMERICAN TREES 235 
This very distinct and interesting species can perhaps be best grouped 
with Crataegus viridis Linn. From that species it differs in its larger 
flowers, in the bright canary-colored fruits, unlike in color those produced by 
any of the North American species now known, in the form and texture of 
the leaves and in the color of the bark of the trunk and branchlets. 
~ Crataegus glabriuscula, n. sp. Glabrous with the exception 
of a few soft caducous hairs on the under surface of the large 
leaves of vigorous shoots and on the upper side of the calyx- 
lobes. Leaves oblong-ovate to semi-orbicular, or to broadly 
ovate on vigorous shoots, rounded, acute, or short-pointed at the 
apex, cuneate from below the middle and decurrent on the slen- 
der often glandular petioles, coarsely doubly serrate except 
toward the base, occasionally more or less deeply lobed above 
the middle, particularly on vigorous shoots, with two or three 
pairs of short broad acute lobes, membranaceous at the flower- 
ing time but at maturity subcoriaceous, hard and firm, dark green 
and lustrous on the upper surface, pale on the lower surface, 
from 1% to 2 in. long, from 3% to % in. wide, with slender 
pale yellow midribs ‘and primary veins running obliquely 
toward the apex of the leaf, conspicuous secondary veins and 
reticulate veinlets; stipules lunate to semiorbicular, coarsely 
glandular serrate, from % to % in. wide, Flowers % in. in 
diameter on slender elongated pedicels, in few-flowered rather 
compact compound thin branched corymbs; bracts and bractlets 
linear, obscurely glandular-serrate, minute, caducous ; calyx-tube 
broadly obconic, the lobes short, acute, entire or slightly and 
irregularly glandular-serrate, reflexed after anthesis; stamens 
20; filaments slender, elongated; anthers comparatively large ; 
Styles 5. Fruit drooping on slender stems, oblong to obovate, 
dull orange-color, marked by minute dark lenticels, 4 in. long; 
calyx-tube elongated with a deep broad cavity, the lobes but 
little enlarged, dull red on the upper surface toward the base, 
spreading or appressed, often deciduous; flesh very thin, yellow, 
dry and hard; nutlets 5, rounded or obscurely grooved on the 
back, about 3, in. long. 
A tree 20 to 25 ft. in height with a slender trunk often 12 
