1923) SARGENT, NOTES ON NORTH AMERICAN TREES 101 



Crataegus Milled (§ Pruinosae), n. sp. 



Leaves ovate, rounded or cuneate at base, acute or acuminate at apex, 

 slightly lobed above the middle with acuminate lobes, and sharply often 

 doubly serrate; tinged with red and roughened above by short white 

 hairs when they unfold, soon glabrous and at maturity thin, bluish green, 

 3-4 cm. long and 2-2.5 cm. wide, with a slender midrib and primary veins; 

 petioles slender, glandular toward the apex, glabrous, 1.5-2 cm. in length; 

 leaves on vigorous leading shoots ovate, acuminate, rounded at the wide 

 base, more deeply lobcd and more coarsely serrate, often 6-9 cm. long 

 and 5.5-6.5 cm. wide, with stout deeply grooved petioles 2.5-3 cm. in 

 length. Flowers opening at the end of May or early in June, about 1.5 

 cm. in diameter, on slender pedicels in mostly 10-1 5 -flowered broad lax 

 glabrous corymbs, their bracts and bractlets conspicuous, glandular- 

 serrate, soon deciduous; calyx-tube broad-obconic, glabrous, the lobes 

 gradually narrowed from the base, slender, acuminate, entire or obscurely 

 serrate below the middle, glabrous; stamens 7-10; anthers pink to rose 

 color or maroon; styles 3-5. Fruit ripening early in October, on long slen- 

 der pedicels, obovoid, gradually narrowed from above the middle to the 

 acute base, green and covered with a glacuous bloom, becoming red just 

 before falling, 1.5 cm. long and 8-10 mm. in diameter, the calyx little 

 enlarged, with a short tube, spreading and reflexed lobes and a wide 

 shallow cavity; flesh thin, dry and mealy; nutlets 3-5 rounded at the ends, 

 broader at apex than at base, prominently ridged on the back, about 7 

 mm. long and 5 or 6 cm. wide, the narrow pale hypostyle extending nearly 

 to the base. 



A shrub 3-4 m. high, with thick erect branches and stout slightly zigzag 

 glabrous branchlets dark reddish brown when they first appear, becoming 

 lighter before the end of their first year, and armed with numerous stout 



nearly straight light chestnut-brown spines 3-6 cm. in length. 



Pennsylvania. Erie County, Cliffs of 4-mile Creek, Erie, R. E. Horsey 

 and John Miller, No. 76, September 23, 1016, R. E. Horsey, No. 76, May 29, 

 1917, John Miller, No. 76, June 11, 1917; Kearsarge, R. E. Horsey and John Miller, 

 Nos. 80 (type), 81, 82, 83, 87, September 24, 1916, May 31, 1819, John Miller, Nos. 

 80, 81, 82, 83, June 11, 1917. 



This species is most closely related to C. ovatifolia from Cooper's Plains, 

 New York, from which it differs in its more sharply lobed leaves often 

 rounded at base, smaller flowers with entire or nearly entire calyx-lobes, 

 and fruit more gradually narrowed at base. It differs from C. incim 

 Sarg. from Stratford, Connecticut, a species with leaves cuneate at 

 base, about ten stamens and obovoid fruit, in its smaller less deeply lobed 

 leaves covered when they first appear with short white hairs, smaller 

 flowers in more numerous-flowered corymbs and fruit more gradually 

 narrowed at base. In shape the fruit resembles that of C. levis Sarg. 

 from Litchfield, Connecticut, but the nutlets are narrower, acute at the 

 ends and less prominently ridged on the back. The leaves of that species 



