CRAT.EGUS. COTONEASTER. M ESPILUS. 113 



17- JR. ccesia (Sm.) ; prickles uniform uncinate, leaflets doubly 

 serrate downy without glands, sep. distantly and sparingly pin- 

 nate, fr. elliptical smooth. E. B. 2367. Difficult to distinguish 

 on paper from R. canina, but more resembling R. tomentosa in 

 appearance. In the north. Sh. VI. 



tt Styles united in a column, mostly exserted. 



18. JR. systyla (Woods); prickles uniform uncinate, leaflets 

 simply serrate without glands, sep. sparingly pinnate deciduous, 

 central germens stalked, styles hairless surrounded by a convex 

 disk, stigmas forming a conical head, shoots nearly erect. E. B. 

 1895. Serratures towards upper ends of the Its. usually conver- 

 ging. Germens in centre of calyx on stalks as long as themselves. 

 Column of styles variable in length. L. nearly glabrous or hairy 

 on both sides. The strongly arched shoots often rise to the 

 height of 1012 feet. Hedges and thickets. Sh. VI. VII. 



19. R. arvensis (Huds.) ; prickles uncinate those on the ra- 

 muli feeble, Its. simply serrate deciduous without glands, sep. 

 sparingly pinnate deciduous, germens all sessile, styles hairless 

 surrounded by a nearly fiat disk, stigm. forming a round head, 

 shoots trailing. E. B. 188. Hedges and thickets. Sh. VI. VII. 



Suborder III. Pomea. 

 15. CRAT^GUS Linn. Hawthorn. 



1. C. Oxyacantha (L.) ; spinose, 1. obovate 3 4-lobed cut and 

 serrate cuneate at the base, fl. corymbose, cal. not glandular, 

 styles 1 3. E. B. (var. ft. ?) 2504. a. C. Oxyacantha (L., 

 Jacq.) ; 1. lobed bluntish, ped. and cal. usually glabrous, cal.- 

 lobes ovate-acuminate, styles 1 3, fruit oval, nuts 1 3. ft. 

 C. monogyna (Jacq.) ; 1. deeply lobed usually acute, ped. and caL 

 villose, cal. -lobes lanceolate acuminate, style 1. bent, fruit sub- 

 globose. Hedges and thickets, ft. the more common form. T. 

 V.VI. 



16. COTONEASTER Lindl. 



1. C. mdgaris (Lindl.) ; 1. roundish-ovate rounded at the base, 

 flowerstalks and margins of the calyx downy. E. B. S. 2713. 

 Pet. rose-coloured. Fr. small, pendulous. Cliffs at the Great 

 Orme's Head, Caernarvonshire. Sh. V. E. 



1 7. MESPILUS Linn. Medlar. 



1. M. germanica (L.) ; 1. lanceolate undivided downy beneath, 

 fl. solitary. E. B. 1523. L. entire simply or doubly serrate. 

 In the wild state it is spinous. Hedges and thickets in Surrey, 

 Sussex and Cheshire. T.V.VI. E. 



