204 JOURNAL OF THE ARNOLD ARBORETUM [vol. hi 



broad-obconic, glabrous, the lobes separated by wide sinuses, laciniately 

 glandular-serrate, glabrous on the outer surface, puberulous on the inner 

 surface; stamens 10; anthers rose color; styles 2-5. Fruit ripening the 

 middle of September, on slender drooping pedicels in many-flowered 

 clusters, subglobose, scarlet, lustrous, 8-10 mm. in diameter, the calyx little 

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

 narrow cavity pointed in the bottom; flesh thick and succulent; nutlets 

 2-5, rounded at apex, narrowed at base, only slightly grooved on the back, 

 penetrated on the inner face by narrow shallow grooves, the narrow dark 

 hypostyle extending to about the middle. 



A round-topped tree 4-5 m. high, with yellow-green bark and stout 

 glabrous branchlets very rarely furnished with stout nearly straight 

 chestnut-brown spines 5 cm. long or entirely spineless, yellow-green when 

 they first appear, becoming chestnut-brown, lustrous and marked by pale 

 lenticels at the end of their first season and dark red-brown the following 



year. 



Canada. Province of Q u e b e c, Longueuil, opposite Montreal, in the 

 grounds of College Longueuil Brother Victorin, No. 27 (type), June 4 and September 

 22, 1913; Outremont, Montreal Island, Brother Victorin, No. 31, May 29 and 

 September 11, 1914. 



Glabrous species in the Macracanthae are rare. On page 10 of this 

 volume of the Journal one of these, C. nuda Sarg. of southern Missouri, 

 was described and of the eastern species previously described only one, C. 

 bristoliensis Sargent from southern Massachusetts, has ten stamens and 

 rose-colored anthers. The other species have yellow anthers. From C. 

 bristoliensis this new species differs in its larger, thinner and more deeply 

 and regularly lobed acuminate leaves, in its narrow calyx-lobes, in its 

 ellipsoidal to obovoid fruit, and in its more numerous spines. 



Crataegus carrollensis (§ Macracanthae), n. sp. 



Leaves ovate to rarely obovate, acuminate at apex, abruptly or gradu- 

 ally narrowed and concave-cuneate at base, slightly and irregularly 



divided usually only above the middle and coarsely often deeply serrate 



with straight gland-tipped teeth; more than half grown when the flowers 

 open and then covered above with short white hairs and slightly villose 

 below especially on the midrib and veins, and at maturity thin, yellow- 

 green, smooth, lustrous and glabrous above, still villose below, 7-10 cm. 

 long and 5.5-7 cm. wide, with a stout midrib and slender primary veins; 

 petioles stout, wing-margined toward the apex by the decurrent leaf 

 blade, densely villose early in the season, becoming pubescent in the autumn 

 2-2.5 cm. in length. Flowers (only buds seen) in many-flowered corymbs, 

 densely covered with matted white hairs, with conspicuous oblong-obovate 

 to linear-lanceolate bracts and bractlets; calyx-tube narrow-obconic, 

 villose, the lobes narrow-acuminate, laciniately glandular-serrate, sparingly 

 villose or glabrous on the outer surface, glabrous on the inner surface; 

 stamens 15-20; anthers pale yellow; styles 2 or 3. Fruit ripening pro- 



