" 
1901] Sargent,— Cretaegus in the Province of Quebec 77 
'TOMENTOSAE. 
Crataegus Laurentiana. Leaves oblong to oblong-obovate, 
acute or acuminate at the apex, gradually or abruptly narrowed from 
near the middle to the base, divided above, occasionally often deeply 
on vigorous leading shoots, into four or five pairs of narrow acute 
lobes, sharply and often doubly glandular-serrate except toward the 
base; in early spring yellow-green and roughened above by short 
appressed pale hairs and villose along the veins below with scattered 
white hairs, and at maturity subcoriaceous, dark green and glabrous 
on the upper surface and paler on the lower surface, with stout mid- 
ribs and slender remote primary veins running to the points of the 
lobes and rarely slightly hairy below, 2 to 24 in. long, 1 to 2 in. wide; 
petioles stout, more or less broadly winged above, deeply grooved, 
glandular with small dark mostly deciduous glands, villose in spring, 
ultimately glabrous, often dark red after midsummer like the lower 
side of the mibribs of the leaves of leading shoots, 4 to 1 in. long; 
stipules lanceolate to oblanceolate, finally glandular-serrate, bright 
red in fading, 4 to 4 in. long. Flowers 3 in. in diameter on elongated 
slender pedicels in broad loose many-flowered thin-branched com- 
pound huey corymbs; bracts and bractlets linear, finally glandular- 
serrate, bright red before falling, caducous ; calyx-tube broadly obconic, 
coated at the base with long matted pale hairs, nearly glabrous or 
puberulous above, the lobes narrow, acuminate, conspicuously glan- 
dular-serrate, nearly glabrous on the outer surface, villose on the 
inner surface, reflexed after anthesis: stamens ro; filaments slender; 
anthers small, pale pink, fading purple; styles 3-5. Fruit in wide 
thick-branched slightly villose drooping or erect clusters, oblong, 
dark crimson, from 3 to 4 in. long; calyx prominent with a deep 
broad cavity and elongated glandular-serrate appressed lobes; flesh 
thin, yellow, finally becoming sweet and succulent; nutlets 4 or s, 
thick and broad, about 1 in. long, prominently ridged on the back 
with broad rounded ridges, grooved on the inner faces by two shallow 
irregularly shaped lateral depressions. 
A stout much-branched shrub with thick stems ro to 15 feet high, 
and stout zigzag branchlets, dark green and coated when they first 
appear with hoary tomentum, soon becoming glabrous, bright orange- 
brown and very lustrous during their first season and gray during 
their second year, and armed with very stout chestnut-brown lustrous 
spines from 2 to 3 in. long and often pointed toward the base of the 
branch. 
Flowers the first week of Tune. Fruit ripens at the end of Sep- 
tember and shrivels on the branches sometime before falling. 
J. G. Jack, Rocky Banks of the St. Lawrence River in the village 
of La Tortue at the Lachine Rapids, August and October, 1899, 
May, 1900, and rocky limestone ridges, Caughnawaga, October, 
1899, May, 1900. 
