CRATAEGUS IN MISSOURI. 103 



Flowers on long pedicels, in compact 10-15-flowered 

 corymbs ; fruit ripening early in August. 



6, C lanigera. 

 Leaves narrow at the base^ ovate to oval, yellow-green. 



Fruit subglobose, crimson, ripening late in September; 



leaves scabrate above. 7. C. TreleaseL 



Fruit obovate, scarlet^ ripening in August; leaves glabrous 



above. 

 Anthers rose color. 



Leaves broad at the base. 



8. C dumetosa. 



Leaves thin, smooth, yellow-green; fruit subglobose to 

 ovate, bright yellow, ripening at the end of September. 



9. C. KelloggiL 



Leaves subcoriaceous, scabrous, dark blue-green ; fruit 



subglobose to short-oblong, dark crimson, ripening at the 



end of October. 10. C. lanuginosa. 



Leaves narrow at the base, thin, yellow, scabrate; fruit obo- 



vate, light cherry-red, ripening in October. 



11. C dispessa. 



1. Crataegus mollis Schcelc, Linnaea, xxi. 569 (1848). 



Sargent, Silva N. Am, xiii. 83, t. 659; Bot, Gazette, 

 XXXV. 379; Manual, 423, f. 341; Rep. Geolog, Surv. 

 Michigan, 1906, 343. 



This species, widely and generally distributed usually on 

 bottom-lands from Ohio to Nebraska, is apparently common 

 in the neighborhood of St, Louis and in Jackson County, and 

 possibly reaches Jasper County. Some of the trees, however, 

 which have been referred to this species, vary greatly in the 

 thickness of their leaves and in the time when the fruit ripens, 

 and I have not yet sufficient material and information to 

 make it possible to form a clear idea of the limits of variation 

 and of the range of this tree in Missouri, 



2. Crataegus declivitatis, n. sp. 



Leaves ovate, acuminate, rounded or abruptly cuneate at the broad 

 base, coarsely often doubly serrate, with straight glandular teeth, and 

 shghtly divided into 5 or 6 pairs of acuminate spreading lobes; slightly 

 tinged with red when they unfold, not more than a quarter grown when the 

 flowers open from the middle to the 20th of April and then very thin, 

 covered above by short white hairs and villose on the midribs and primary 

 veins below, and at maturity thin, dark bluish green, glabrous and tomen- 

 tose on the upper surface, pale blue-green on the lower surface, 6-8 cm. 

 long and 5-6 cm. wide, with thin sparingly villose midribs and primary 



