DICOTYLEDONS. ROSACE.^. Rosa. 2G1 



wanting. Stamens indefinite, rarely definite, inserted into a 

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

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

 styledj or Ofane5 numerous, 1-celled, 1-styIed. Stj/les ]?l- 

 teral. Fruit an apple in those with an inferior ovary ; in the 

 rest an aggregation of Achenia or follicles, inclosed within 

 the calyx tube, which is sometimes fleshy ; attached to a 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. Pomace.t.. Fruit inferior, seed ascending. 

 1. PYRUS. 

 Cat. 5 -cleft. Apple with from 2 — 5 two-seeded celU. Testa 

 cartilaginous, 



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

 umbel, p. 151. — Woods and hedges. 



2. P. auc2iparia, leaves pinnated glabrous on both sides, flowers 

 corymbose, p. 151, — Woods. 



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

 neath, flowers corymbose, p. 152. — IVoods. 



2. CRAT.^GUS. 

 Cnl. persistent. Fruit closed, with from 2 — 5 2-seeded nxits. 

 Testa membranous. 



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

 deep serrated segments the lower ones spreading, flowers co- 

 rymbose, styles I — 2. p. 151. — Woods and hedges. 



Sect. II. Rosacea, Achenia superior, inclosed in a fleshy 

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

 receptacle. Seeds suspended. Stamens indefnite. 

 1. ROSA. 



* PiMPiNELLiFOLi.T". Seligerous, with arms crowded, nearly umforrn, 

 or unarmed; mosthj without hracteas. Leafets oimte or oblong. 

 Segments of the cat. connivent, persistent. Disk scarcehj any. 



\, 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. 



A. R. Sabini, bristles few and prickles unequal distant, leaflets 

 doubly serrated tomentose, segments of tl)e calyx compound. 



B. Z)o72?Vy;j(/, bristles scarcely (tny, prickles nearly straight, p. 155, 

 "^Scotlund, (i. Mountain^. 



