go NEW YORK STATE MUSEUM 
zigzag branchlets dark orange-green and marked by pale lenti- 
cels when they first appear, becoming light chestnut-brown and 
lustrous at the end of their first season and dull gray-brown the 
following year, and armed with stout slightly curved chestnut- 
brown shining spines 3.5 to 4 cm long. 
On clay soil north of Hemlock lake in the town of Richmond, 
Livingston county, Henry T. Brown (no. 136, type), September 
27, 1907; May 30, 1908. 
Crataegus maineana Sargent 
Proc. Rochester Acad. Sci. 4. 106 (1903); N. Y. State Mus. Bul. 122 
46 (1908). 
Hemlock lake, Rochester, Belfast and Buffalo. 
Crataegus opulens Sargent 
Proc. Rochester Acad. Sci. IV. 104 (1903). 
Near Herkimer, Coopers Plains, Belfast, Hemlock lake, 
Rochester, Brighton, Buffalo; also in southeastern Michigan. 
Crataegus perspicabilis n. sp. 
Glabrous with the exception of the hairs on the young leaves 
and calyx-lobes. Leaves ovate, acuminate, rounded or abruptly 
cuneate at the broad base, coarsely doubly serrate with straight 
glandular teeth, and slightly divided into four or five pairs of 
short, broad, lateral lobes; more than half-grown when the 
flowers open from the 20th to the end of May, and then thin, 
yellow-green and sparingly furnished above with short white hairs 
and paler below, and at maturity thin but firm in texture, 
blue-green on the upper surface, pale blue-green on the lower 
surface, 5~7 cm long and 5-6 cm wide, with slender midribs and 
primary veins; petioles slender, shghtly hairy on the upper side 
while young, soon becoming glabrous, glandular with occasional 
minute persistent glands. 3 to 3.5 cm in length; leaves on vigor- 
ous shoots ovate, acuminate, rounded, truncate or slightly ob- 
cordate at the wide base, thicker, more deeply lobed, coarsely 
serrate, often Io to 11 cm long and broad, their petioles stout, 
glandular with prominent stipitate persistent glands. Flowers 
on long slender pedicels, in narrow mostly 4-10-flowered 
corymbs, the elongated lower peduncles from the axils of upper 
leaves; calyx-tube narrowly obconic, the lobes gradually nar- 
rowed from wide bases, long, slender, acuminate, ciliate or 
