MALACEAE 567 



173. Crataegus denaria Beadle. A tree 5-7 m. tall, with a trunk sometimes 2 dm. 

 in diameter covered with dark gray or brownish scaly bark. Leaf-blades oval, oblong- 

 obovate or elliptic, or on leading shoots broadly oval, ovate or obovate, 2.5-6 cm. long, 

 1-4 cm. wide, glabrous at maturity, mostly pointed at the apex, contracted or narrowed at 

 the base, the borders serrate ; petioles 5 mm. -2 cm. long, margined, glabrous or with a 

 few hairs on the upper side, especially when young : corymbs compound, many-flowered, 

 more or less pilose : pedicels and hypanthium sparingly pilose or glabrous : sepals 4-6 

 mm. long, entire or slightly serrate : corolla 13-16 mm. wide : stamens normally 10 : fruit 

 globose or subglobose, 6-9 mm. thick, the flesh thin and firm : nutlets 3-5,' 5-6 mm. long, 

 the hypostyle about two-thirds as long as the ventral angle. 



On banks of streams, eastern Mississippi. 



174. Crataegus crpcina Beadle. A tree 4-6 m. tall, with a short trunk covered 

 with ashy gray or brownish black scaly bark. Leaf-blades oblong or obovate-cuneiform, 

 2-5.5 cm. long, 1-3 cm. wide, glabrous or glabrate on the upper surface at maturity, pale 

 or whitened and pubescent beneath, especially along the midrib and principal veins, either 

 rounded or pointed at the apex, cuneate at the base, the borders serrate, except near the 

 base ; petioles 5-15 mm. long, margined, pubescent, at least when young : corymbs sub- 

 simple or compound, few- or many-flowered : pedicels and hypanthium pilose-pubescent : 

 sepals 3.5-5 mm. long, entire or slightly serrate : corolla 12-16 mm. wide : stamens nor- 

 mally 20, the anthers yellow : fruit oval or oblong, 8-11 mm. thick, ripening in October, 

 yellow at maturity : nutlets 2, about 7 mm. long, the hypostyle 4-5 mm. long. 



In low woods, southern Louisiana. 



175. Crataegus albicera Beadle. A tree sometimes 7-8 m. tall, with a trunk 2 dm. 

 in diameter clothed with dark gray or brownish scaly bark. Leaf-blades oval, elliptic or 

 oblong, sometimes obovate- or oblong-cuneiform, 2-6 cm. long, 1-4 cm. wide, at maturity 

 dark green and glabrate on the upper surface, pale or whitened and pubescent beneath, the 

 pubescence dense and more persistent along the midrib and principal veins, mostly pointed 

 at the apex, contracted or narrowed at the base, the borders serrate, mostly above the 

 middle ; petioles 2-10 mm. long, pubescent : corymbs hirsute-pubescent, compound : pedi- 

 cels and hypanthium hirsute-pubescent : sepals 3-4 mm. long, slightly serrate or entire : 

 stamens 10-14, the anthers purple : fruit oblong, 8-12 mm. thick, 10-14 mm. long, ripen- 

 ing in August, at maturity pale yellow, the flesh soft and edible : nutlets solitary or in 

 pairs, about 7 mm. long, the hypostyle about 4 mm. long. 



In open, rich woods, southern Louisiana. 



176. Crataegus sinistra Beadle. A small tree, or a large much-branched shrub 3-5 

 m. tall, with one or more stems clothed with dark gray or brownish black scaly bark. 

 Leaf-blades obovate, oval or elliptic, 2-5 cm. long, 8 mm. -3 cm. wide, glabrous or gla- 

 brate in age on the upper surface, pubescent beneath, especially along the midrib and 

 principal veins, mostly rounded but occasionally pointed at the apex, wedge-shaped or 

 more abruptly contracted at the base, the borders serrate above the middle, or rarely 

 entire ; petioles 3-7 mm. long, margined, pubescent : corymbs compound, pilose-pubes- 

 cent, 7-15-flowered : pedicels and hypanthium pilose-pubescent : sepals 3-4 mm. long, 

 mostly entire : stamens normally 10, the anthers purple : fruit oval, 9-12 mm. long, 6-8 

 mm. thick, at maturity reddish, red and green or with yellowish surfaces where not ex- 

 posed and brownish red cheeks, the flesh thin and firm : nutlets 1-2, 7-8 mm. long, the 

 hypostyle about 4 mm. long. 



On limestone hills, middle Tennessee. 



177. Crataegus signata Beadle. A tree 5-6 m. tall, or frequently a large much- 

 branched shrub with one or more stems. Leaf -blades obovate or obovate-cuneiform, or 

 occasionally oval on leading shoots, 2-4 cm. long, 1.5-3 cm. wide, pubescent, either rounded 

 or pointed at the apex, wedge-shaped or contracted at the base, the borders sharply serrate 

 especially above the middle, or on the shoots more sharply serrate and frequently incised ; 

 petioles 3-15 mm. long, margined, pubescent, glandular : corymbs pilose-pubescent, com- 

 pound : pedicels and hypanthium pubescent : sepals 4-6 mm. long, glandular-serrate : 

 stamens normally 10 : fruit oval or oblong, 9-14 mm. long, 7-10 mm. wide, red at ma- 

 turity, more or less pruinose, punctate: nutlets 3-5, 7-8 mm. long, 3-4 mm. deep, the 

 hypostyle 4-5 mm. long. 



In open, mostly dry copses, southern Alabama. 



178. Crataegus Crus-Galli L. A tree sometimes 8-9 m. tall, with a trunk 3-4 dm. in 

 diameter, covered with dark gray or brownish scaly bark. Leaf- blades obovate or ob- 

 lanceolate, 2-5 cm. long, 1-3 cm. wide, or on leading shoots frequently oval and of 

 greater size, glabrous, obtuse or pointed at the apex, cuneate at the base, the borders 

 sharply serrate above the middle ; petioles 5-15 mm. long, margined : corymbs compound, 



