73 JOURNAL OF THE 
shaped base: petiole slender, 15-25mm. long, narrowly 
winged above. The flowers which appear when the leaves 
are almost full grown in 7-12—flowered nearly simple corymbs, 
the lower branches from the axils of upper leaves, are white, 
12-15 mm. wide and borne on strict glabrous pedicels 
10--22 mm. long: petals orbicular, with a short claw, calyx 
glabrous, its divisions entire or sparingly serrate: styles 2-3 
in number, 5mm. long overtopping the 15-20 glabrous sta- 
mens: bractlets of corymbs and stipules of unfolding twig 
early deciduous, greenish, not conspicuously colored, spathu- 
late, pectinately glandular. Fruit quite 1cm. in diameter, 
nearly round, glabrous, fleshy, reddish or orange, persistent 
until late in the winter, on strict, slender pedicels: nutlets 
usually three, about 5mm. long, the broad convex back deep- 
ly grooved and ridged. In eastern Missouri the flowers ap- 
pear about the middle of May. 
Crataegus Margaretta is found from eastern Iowa and 
southern Illinois to eastern Missouri, generally occurring 
along small streams. It is apparently related to Crataegus 
punctata Jacg., from which it is distinguished by having 
fewer-flowered leafy corymbs, smaller fruit, and much broad- 
er leaves, which are pointed and have fewer pairs of promi- 
nent veins. The type material is preserved in my herbarium. 
The type locality St. Louis county, Mo. 
Crataegus macrosperma n. sp. A small tree 5-7 meters in 
height, with wide-spreading branches, forming an oval or 
round crown, the trunk covered with gray-brown bark broken 
into small oblong scales: branches gray, armed with num- 
erous short, very stout, 1-3cm. long, dark red-brown or purp- 
lish to nearly black thorns:twig of the sezson rather thick,dark 
red-brown to purplish,sparingly glaucous glabrous, marked with 
a few small grayish lenticels : winter-buds rather large, oval 
or globular, dark red-brown, the obtuse or rounded scales 
glabrous. Leaves membranaceous but firm, dark green 
above, paler and sparingly glaucous or whitish beneath, the 
blades deltoid or broadly oval, obtuse at the apex, rounded, 
subcordate or on vigorous shoots cordate with a narrow sinus 
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