

DICOTYLEDONS. ROSACES. Rbsa. 261 



r 



wanting. Stamens indefinite, rarely definite, inserted into a 

 disk encircling the mouth of the calyx. Anthers small, round- 

 ish. Ovary 1, many-celled, many-styled; or 1 -celled, 1- 

 styled; or Ovaries numerous, l-ce!!ed, 1 -styled. Styles la- 

 teral, fruit an apple in those with an inferior ovary; in the 

 rest an aggregation of Achcma or follicle*, inclosed within 

 the calyx tube, which is sometimes fleshy; attached ton more 

 or less exserted receptacle. Seeds ascending or suspended, 

 Embryo straight, without albumen. Radicle laterally oppo- 

 site the hilum. Cotyledons broad. 

 Trees or Herbs with alternate leaves and stipules. 



SECT. I. POMACES. Fruit inferior 9 seed ascendtrfg. 



1. PYRUS. 



Cal. 5 -cleft. Apple with from 2 5 two-seeded cells. Testa 

 cartilaginous. 



1. P. Mains, leaves ovate acute serrated, flowers in a sessile 

 umbel, p. 151. Woods and hedges. 



2. P. aucuparia, leaves pinnated glabrous on both sides, flowers 

 corymbose, p. 151. Woods. 



3. P. Aria, leaves ovate cut and serrated white and downy be- 

 neath, flowers corymbose, p. 152. Woods. 



2. CRAT^GUS. 



Cal. persistent. Fruit closed, with from 2 5 2-seeded nuts. 

 Testa membranous. 



1. C. Oxyucantha, spiny, leaves glabrous cleft into three or five 

 deep serrated segments the lower ones spreading, flowers co- 

 rymbose, styles 1 2. p. 151. Woods and hedges. 



SECT. II. ROSACES. Achenia superior, inclosed in a fleshy 

 urceolate tube of the calyx, and enveloped in the hairs of the 

 receptacle. Seeds suspended. Stamens indefinite. 



1. ROSA. 



* PIMPINELLIFOLI^E. Setigerous, with arms crowded, nearly uniform, 

 or unarmed; mostly without bracteas. Leaflets ovate or oblong. 

 Segments of the cal. connivent, persistent. Disk scarcely any. 



1. R. rubella, arms crowded equal, fruit elongate pendulous. 

 p. 152. Banks of rivers. 



2. R. spinosissima, arms unequal, leaflets plane without pubes- 

 cence simply serrated, p. 154. Pastures. 



3. R. involuta, arms very unequal and crowded, leaflets doubly 

 serrated, petals convolute, fruit bristly, p. 154. Mountains. 



4. R. Salintj bristles few and prickles unequal distant, leaflets 

 doubly serrated tomentose, segments of the calyx compound. 



f>. Doniana, bristles scarcely any, prickles nearly straight, p. 155. 



Scotland, fi. Mountains. 



