RILTMORE BOTANICAL STUDIES 



09 



thirds grown ; they are produced in simple, 3-6-flowered corymbs 

 which terminate short, leafy branchlets : pedicels and hypanthium 

 glabrous : sepals triangular-lanceolate, 3-4 mm long, serrate or 

 nearly entire, reflexed after anthesis : stamens normally 20, the 

 anthers pale purple : fruit, which ripens in September and Octo- 

 ber, globose, 7~9 mm wide, the flesh firm : nutlets 3-5, about 6 mm 

 long, the lateral surfaces nearly plane : hypostyle occupying a 

 trifle more than half the ventral angle. 



Crataegus assimilis frequents the hills and dry woods near Chattahoochee, 

 Florida (type locality), and has been found in similar situations lower down the 

 Apalachicola river. 



The type specimens, consisting of flowers {H40Q6) and fruit (1/4962) from 

 the same tree, are preserved in the Biltmore Herbarium, 



Crataegus robur n. sp. 



A tree sometimes 7-8™ tall with a trunk i-i.5 dm in diameter 

 clothed with gray or brownish scaly bark, or more often a large, 

 much-branched shrub with one or more stems, the ascending or 

 spreading branches sometimes armed with stout spines 2-3°™ long : 

 leaves ovate, oval or short-obovate, the blades 3-6 cm long, i.5-4 cm 

 wide, or even broader on leading shoots, acute at the apex, 

 narrowed or contracted, or on vigorous shoots rounded or sub- 

 truncate at the base, the borders serrate and incisely lobed or 

 acutely cleft ; they are glabrous, thin to firm in texture, bright 

 green, fading in autumn with tones of yellow, brown and orange : 

 petioles 7 mm -2. 5 cm long, margined: flowers i5-i8 mm wide, open- 

 ing the last of March or early in April and when the leaves are 

 about two-thirds grown ; they are borne in simple or subsimple, 

 3-10-flowered, glandular-bracteate, glabrous corymbs : pedicels 

 and hypanthium glabrous, the former i-2 cm long : sepals lanceo- 

 late, 3-4 mm long, entire or sparingly serrate, reflexed after anthesis: 

 stamens normally 20, the anthers pale purple : fruit, which ripens 

 in September and October, subglobose, 7-9™™ wide, the flesh 

 firm : nutlets 3-5, 5-6 mm long, the lateral surfaces nearly plane : 

 hypostyle about 4 mm long. 



Crataegus robur has been found abundantly distributed in the woods and 

 borders of fields near Tallahassee, Florida (type locality), and in similar situations 

 in the same general region. 



The type material, flowers (B20J/) and fruit (B2031' 1 ) from the same tree, is 

 deposited in the Biltmore Herbarium. 



