140 ROsXcEJE 



ii. Agrim6nia. — Sepals 5; petals 5; stamens 12—20; 

 achenes 2. 



12. Poterium. — Segals 4; petals absent; stamens 20 — 30; 

 achenes 2 — 3 ; some flowers unisexual. 



13. Sanguisorra. — Flowers perfect; sepals 4; petals absent; 

 stamens 4 ; achenes 1 — 2. 



Tribe 6. Rbsece. — Petals 5 : carpels many, i-seeded, enclosed in 

 the large fleshy calyx- tube. 



14. Rosa. — Sepals 5 ; petals 5 ; stamens indefinite. 



mh'-xus SPIn6sa (jSloe or Blackthorn). 



Tribe 7. Pbmece. — Petals 5: carpels 1 — 5, 1 — 2-seeded : fruit a 

 pome. 



15. Pyrus. — ^rw// 2 — 5-chambered; chambers 2-seeded; core 

 horny, enclosed. 



16. Mespilus. — Fruit 5-chambered; chambers 1 -seeded ; core 

 bony, exposed. 



17. CRATvfcGus. — Fruit 1 — 5-chambered; core stony. 



18. Cotoneaster. — Fruit 2 — 5-chambered ; <w<? stony, pro- 

 jecting. 



