110 26. ROSACEA. 
tt Styles united in a column, mostly exserted. 
18. R. systyla (Bast.?); prickles uniform uncinate, leaflets 
simply serrate without glands, sep. sparmgly pimnate 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 end of the Its. usually converg- 
ing. Germens in centre of calyx on stalks as long as themselves. 
Column of styles variable in length. LL. nearly glabrous or hairy 
on both sides. The strongly arched shoots often rise to the 
height of 1O—12 feet.— Hedges and thickets. Sh.VI.VI. E.I. 
19. R. arvensis (Huds.); prickles uncinate those on the ra- 
muli feeble, leaflets simply serrate deciduous without glands, 
sep. sparingly pinnate deciduous germens all sessile, styles hair- 
less surrounded by a flat disk, stigmas forming a round head, 
shoots trailing. —E. B.188.—Hedges and thickets. Sh. VI. VII. 
Tribe V. Pomee. 
15. Craraeus Linn. 
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. 8.?) 2504.—It is not improbable that 
the following are distinct species.—a. C. Oxyacantha (L., Jacq.) ; 
1, lobed bluntish, peduncles and calyces glabrous, cal.-lobes ovate- 
acuminate, styles 1—3, fruit oval, nuts 1—3.—8. C. monogyna 
(Jacq.); 1. deeply lobed usually acute, peduncles and calyces 
villose, cal.-lobes lanceolate-acuminate, style 1. bent, fruit sub- 
globose.— Hedges and thickets, 8. the more common form. T. V. 
VI. Hawthorn. Whitethorn. 
16. CorongastTER Lindl. 
1. C. vulgaris (Lind].) ; 1. roundish-ovate rounded at the base, 
flowerstalks and margins of the calyx downy.—E. B. 8. 2713,— 
Pet. rose-coloured. Fr. small, pendulous.—Cliffs at the Great 
Orme’s Head, Caernarvonshire. Sh. V. 
17. Mesritus Linn. 
1. M. germanica (L.); 1. lanceolate undivided downy beneath, 
fl. solitary.—H. B. 1523.—L. entire simply or doubly serrate. 
In the wild state it is spmous.—Hedges and thickets in Surrey, 
Sussex and Cheshire. T.V.VI. Medlar. E. 
18. Pyrus Linn. 
1. P. communis (L.); 1. simple ovate serrated, flowerstalks 
corymbose, fruit turbinate, styles distinct —E. B. 1784.—Germen 
woolly. Leaves sometimes obovate suddenly contracted into a 
