1905] Sargent, Recently Recognized Species of Crataegus 201 
mately ashy gray, and armed with occasional stout straight curved 
purplish spines 1.5-3 cm. long. 
Banks of the Merrimack River near Lowell, Massachusetts, Dame 
and Sargent, September 1902, C. S. Sargent, May 1905. 
This species, well distinguished by its very thin dark blue-green 
leaves and long narrow mostly pear-shaped fruits hanging on long 
slender stalks is named for the late Lorin Low Dame (1838-1903), 
one of the authors of Zhe Flora of Middlesex County, Massachusetts, 
of Typical Elms and other Trees of Massachusetts, and of a Handbook 
of the Trees of New England, by whom it was first pointed out to me. 
Crataegus serena, n. sp. Leaves ovate, acuminate, concave- 
cuneate or sometimes rounded at the broad base, finely often doubly 
serrate, with straight or incurved glandular teeth, and divided into 
4 Or 5 pairs of short broad acute spreading lobes, when they unfold 
deeply tinged with red especially on the lower surface and covered 
above with soft white hairs, about one-third grown when the flowers 
open from the 20th to the end of May and then thin, yellow-green and 
scabrate above and pale and glabrous below, and at maturity thin 
but firm in texture, dark dull yellow-green on the upper and paler on 
the lower surface, 5-6.5 cm. long and 3-5 cm. wide, with stout yellow 
midribs, and thin prominent primary veins arching obliquely to the 
points of the lobes; petioles slender, wing-margined at the apex, 
nearly terete, glabrous, glandular near the apex, with minute often 
persistent glands, 2-3 cm. in length; stipules linear-obovate, acute, 
glandular, fading brown, caducous; leaves on vigorous shoots long- 
pointed and divided by wide shallow sinuses, often 6—7 cm. long and 
wide, with stout conspicuously glandular rose-colored petioles. Flow- 
ers 1.5-1.7 cm. in diameter, on slender glabrous pedicels, in broad 
lax long-branched many-flowered crowded corymbs, with linear glan- 
dular caducous bracts and bractlets; calyx-tube narrowly obconic, 
glabrous, the lobes slender, acuminate, glandular on the margins 
and at the apex with large dark red glands, glabrous, spreading or 
reflexed after anthesis; stamens usually 7; anthers rose-colored ; 
styles 3. Fruit on long slender drooping pedicels, in few-fruited 
clusters, oblong, full and rounded at the ends, scarlet, lustrous, 
marked by large pale lenticels, about 1.5 cm. long and 1 cm. wide; 
calyx enlarged, with a deep narrow cavity, and incurved slightly ser- 
rate lobes mostly persistent on the ripe fruit; flesh yellow, soft and 
sweet; nutlets 3. gradually narrowed and rounded at the ends, 
ridged on the back, with a broad, high ridge, about 7 mm. long and 
4-5 mm. wide. 
A shrub sometimes 5-7 m. high, with numerous slender erect 
many-branched stems spreading into broad thickets, and slender 
nearly straight branchlets marked by small pale lenticels, dark green 
tinged with red when they first appear, becoming light chestnut-red 
