1921) SARGENT. NOTES ON NORTH AMERICAN TREES, IX. 3 



Crataegus lawrencensis (§Crus-galli), n. sp. 



Leaves oblong-obovate, acute at apex and concave-cuneate at base, or 

 occasionally broad-elliptic and rounded at apex and rarely at base, coarsely 

 often doubly serrate usually only to the middle with broad callus-tipped 

 teeth, and rarely furnished with short lateral lobes, thin, dark yellow-green on 

 the upper surface, pale on the lower surface, glabrous with the exception 

 of a few hairs on the upper side of the midrib, 4-6 cm. long and 2-3.5 

 cm. wide, and on leading shoots up to 7 cm. long and 4 cm. wide; petioles 

 slender, wing-margined often nearly to the base, slightly villose on the 

 upper side, 1-1.5 cm. in length. Flowers appearing at the end of April, 

 1.5 cm. in diameter, on slender glabrous pedicels, in 5-10-flowercd glabrous 

 corymbs; calyx-tube broad-obconic, glabrous, the lobes gradually or 

 abruptly narrowed from a wide base, slender, long-acuminate, entire or 

 furnished with an occasional tooth, glabrous; stamens about 15; anthers 

 deep rose color; styles 3. Fruit ripening early in October, in slender- 

 branched drooping clusters, subglobose, green tinged with red, about 5 

 mm. in diameter, the calyx prominent, with a broad shallow cavity; flesh 

 thin, hard and dry; nutlets 3, broad and rounded at the ends, rounded 

 and rarely slightly ridged on the back, about 5 mm. long and 3-5 mm. 



broad, the narrow hypostyle extending to to the middle. 



A small tree with irregularly spreading branches, dark brown scaly 

 bark and slender nearly straight chestnut-brown branchlets becoming 

 dark gray-brown in their second year, and sparingly armed with slender 

 straight spines 2.5-3 cm. in length. 



Missouri. Lawrence County, La Russell, E. J. Palmer, No. 1, April 22, 

 and October 10, 1908 (type). Jasper County, Webb City, E. J. Palmer, No. IS, 



April 5, 1903. 



Crataegus limnophila ( 



Leaves oblong-obovate, rounded or acute and often apiculate at apex, 

 gradually narrowed and cuneate at base, finely crenulatc-scrrate above 

 the middle, glabrous with the exception of a few hairs on the upper side 

 of the midrib early in the season, thin, dark green and lustrous above, 

 pale below, 3.5-4 cm. long, 1-1.5 cm. wide and nearly fully grown when 

 the flowers open; petioles slender, glabrous, slightly wing-margined, 

 5-6 mm. in length; leaves on vigorous shoots broad-obovate, more coarsely 

 serrate and up to 5 cm. long and 1.5 cm. wide. Flowers opening early 

 in April, about 1 cm. in diameter, on slender pedicels in small compact 

 usually 7 to 10-flowered sparingly villose corymbs; calyx-tube nar- 

 row-obconic, glabrous, the lobes slender, short-acuminate, entire, glabrous 

 on the outer surface, villose on the inner surface; stamens 15-20, anthers 

 dark rose color; styles usually 3-5. Fruit ripening the end of September, 

 in few-fruited erect glabrous clusters, ellipsoidal, bright red, 7-9 mm. 

 long and 6 or 7 mm. thick, with thin dry flesh, the calyx little enlarged, 

 with a deep narrow cavity pointed in the bottom; nutlets 3-5, broad and 

 rounded at base, narrowed at apex, about 5 mm. long and 3 or 4 mm. wide, 

 the broad hypostyle expanding nearly to the base. 



