MALACEAE 541 



maturity, acute at the apex, rounded or narrowed, or occasionally truncate or subcordate 

 at the base, sharply serrate and incisely lobed ; petioles 5-30 mm. long, usually glandular : 

 corymbs simple, 3-7-flowered : pedicels, hypanthium and lanceolate sepals glabrous : corolla 

 about 15 mm. wide : stamens 10, the anthers purple : fruit globose, when ripe 10-11 mm. 

 in diameter, red or rarely greenish with red cheek, the flesh tirm : nutlets 3-5, about 6 mm. 

 long, the hypostyle about three-fourths as long as the ventral angle. 

 In flat woods, northern Alabama and northwestern Georgia. 



18. Crataegus aemula Beadle. A shrub or small tree 3-5 m. tall, with dark gray, 

 either smooth or scaly bark. Leaf-blades broadly ovate, oval or suborbicular, 3-5 cm. 

 long, 1.5-4 cm. wide, acute at the apex, rounded or contracted at the base, the borders 

 serrate and incised, glabrous or glabrate at maturity ; petioles 5-15 mm. long, glandular : 

 corymbs subsimple, 5-10-flowered : pedicels and hypanthium sparsely pubescent : sepals 

 lanceolate, about 4 mm. long, glandular-serrate or pectinately-glandular : corolla 14-18 

 mm. wide : stamens 10, the anthers purple : fruit globose or subglobose, 10-13 mm. in 

 diameter, at maturity red, the flesh firm : nutlets 3-5, 5-7 mm. long, the_hypostyle about 

 two-thirds as long as the ventral angle. 



In low woods and uplands, northwestern Georgia to Mississippi. 



19. Crataegus punctata Jacq. A tree occasionally 9 m. tall, with dark gray or red- 

 dish brown scaly bark or oftener a large shrub with spreading branches. Leaf-blades 

 obovate, 3-7 cm. long, 1.5-5 cm. broad, either obtuse or pointed at the apex, cuneate or 

 more abruptly contracted at the base, irregularly and usually doubly serrate and incised, 

 when fully grown glabrous on the upper surface, the prominent midrib and ascending 

 veins deeply impressed, pubescent below : corymbs compound, many-flowered, pilose- 

 pubescent : pedicels and hypanthium pilose : sepals linear or linear-lanceolate, 5-7 mm. 

 long, pubescent : corolla about 2 cm. wide : stamens 20, the anthers purplish : fruit sub- 

 globose or oval, 1-2 cm. broad, red or yellow when ripe : nutlets 2-3, about 7-9 mm. long, 

 the hypostyle about 5 mm. long. 



On hillsides and in rocky soil, Quebec to.Wisconsin.the mountains of North Carolina and Tennessee. 



20. Crataegus collina Chapm. A small tree 4-6 m. tall, with dark gray scaly bark, 

 Leaf-blades obovate or oval, 2.5-7 cm. long, 2-5 cm. wide, or some larger on leading shoots, 

 acute at the apex, narrowed or contracted at the base into margined glandless or minutely, 

 glandular petioles, glabrous or glabrate when fully grown, the borders serrate and fre- 

 quently incised : corymbs subsimple or compound, pubescent : pedicels and hypanthium 

 pubescent : sepals lanceolate, pubescent and glandular : corolla 15-20 mm. broad : stamens 

 normally 20, the anthers light yellow or nearly white : fruit globose, about 1 cm. in diam- 

 eter, dull red at maturity, the flesh firm : nutlets 3-5, about 7 mm. long, the hypostyle 



city 



[d 



about 4-5 mm. long. [(7. collicola Ashe.] 



In woods and on borders of fields and streams, Virginia to Georgia and Alabama, westward to 

 Tennessee and Missouri. 



21. Crataegus rigens Beadle. A small tree 4-6 m. tall, with dark gray scaly bark, 

 or more frequently a large much-branched shrub with one or several stems. Leaf-blades 

 obovate, broadly oval or occasionally nearly round, 2-5 cm. long, 1.5-4 cm. wide, mostly 

 pointed at the apex, contracted or narrowed at the base into margined glandular petioles, 

 glabrous or glabrate when fully grown, the borders sharply and irregularly serrate and 

 occasionally shallowly incised, especially on leading shoots : corymbs simple or subsimple : 

 pedicels and hypanthium pubescent : sepals lanceolate, pubescent, glandular : stamens 20, 

 the anthers nearly white : fruit subglobose or slightly pyriform, 9-12 mm. thick, red when 

 fully ripe, ripening about a month earlier than that of C. collina, the flesh firm : nutlets 3- 

 5, about 8 mm. long, the hypostyle occupying two-thirds of the ventral angle. 



In woods and on banks of streams, Georgia and Alabama. 



22. Crataegus amnicola Beadle. A tree occasionally 8 m. tall, with dark gray or 

 reddish brown scaly bark and a diameter of trunk of 2-3 dm. Leaf-blades obovate, oval 

 or ovate, 2-6 cm. long, 1.5-4 cm. wide, acute at the apex, contracted or narrowed at the 

 base into margined, glandless or sparingly glandular petioles, glabrous or nearly so when 

 fully grown, the borders sharply and irregularly serrate and incised : corymbs compound, 

 many-flowered, pubescent : pedicels and hypanthium pubescent : sepals 4-5 mm. long, 

 glandular or pectinately glandular : corolla about 15 mm. wide : stamens 20, the anthers 

 nearly white : fruit subglobose, 7-10 mm. in diameter, red at maturity, the flesh firm : 

 nutlets 3-5, about 6 mm. long, the hypostyle two-thirds the length of the ventral angle. 



In moist grounds and on banks of streams, eastern Tennessee and adjacent stations in Georgia 

 and Alabama. 



23. Crataegus ingens Beadle. A tree 5-8 m. tall, with dark gray or brownish scaly 

 bark. Leaf-blades obovate, oval or ovate, 2.5-7 cm. long, 1.5-5 cm. broad, glabrate at 

 maturity, or with some pubescence along the midrib and principal veins beneath, mostly 



