118 ROSACEA. (ROSE FAMILY.) 



ovuled. Seeds anatropous, and, with few exceptions, without albumen. 

 Embryo straight, with large and thick cotyledons. Fruit various. 



Synopsis. 



Suborder I. CIIRYSOBALANE^E. Calyx bractless, free from 

 the solitary ovary. Style single, arising from the base of the ovary. 

 Ovules erect. Fruit a drupe. — Trees or shrubs. Leaves simple. 



1. CHRYSOBALANUS. Calyx-limb persistent. Stone grooved. Low shrubs. 



Suborder II. AMYGDALEJE. Calyx bractless, free from the sol- 

 itary ovary. Style single, terminal. Ovules suspended. Fruit a drupe. 

 Leaves simple. 



2. PRUNUS. Calyx-limb deciduous. Stone even, or grooved on the margins. 



Suborder III. ROSACEJE. Calyx 3 - 5-clcft, the lobes often alter- 

 nating with as many bracts, free from the 1 - several ovaries. Style 

 lateral or terminal. Fruit a 1-10-seedcd follicle, or a 1 -seeded ache- 

 niuin. — Herbs or shrubs. Leaves mostly lobed or compound. 



* Fruit a 1 - 10-seeded follicle. 



3. SPIRiEA. Petals obovate or roundish, imbricated in the bud. 

 5. GILLENIA. Petals linear-lanceolate, convolute in the bud. 



* * Fruit a 1-seeded achenium. 

 +- Fruiting calyx dry, the lobes mostly valvate in the bud. Achenia few, or numerous and 

 collected into a head. 

 ++ Calyx-tube contracted at the throat (except No. 4). Achenia 1-4. 



4. NEVIUSIA. Petals none. Stamens indefinite. Calyx-lobes serrate. 

 G. AGH1MOMA. Petals 5. Stamens 5- 15. Calyx bristly. 



7. SANGUISORBA. Petals none. Stamens 4. Style terminal. 



8. ALC1IEMILLA. Petals none. Stamens 1-4. Style lateral. 



++ ++ Calyx open, bracted. Stamens and dry achenia numerous, the latter rarely 2-4. 

 = Seeds erect. 

 (i. GKl'M. Style persistent. Achenia numerous. 



10. WALKS IK IMA. Style deciduous. Achenia2-6. 



= = Seeds suspended or ascending. 



11. POTENTILLA. Receptacle flat or convex, dry. 



12. FRAG ARIA. Receptacle conical, enlarged and fleshy in fruit. 



** ** .-► Calyx open, bractless. Stamens and juicy achenia numerous. 



13. RTTBUS. Achenia orowded on the < leal receptacle. 



«- — Calyx-tube fleshy, urn-shaped ; the lobes Imbricated in the bud- Aohenia numerous, 

 inserted '>n the receptacle which lines the inside of (ha calyx-tuba. 



14. ROSA. Achenia drj and hairy. Prickly shrubs. 



Suborder IV. POME2E. Calyx including and cohering with the 

 1—5 ovaries, ^erj thick and fleshy in fruit. 



16. CBATJEQU8. Prultof] 6 bony 1-seeded nutlets, 



[6. PYRi B Prultof 2 6 cartilaginous or membranaceous 'J- todoaDai 



17. AMJd. \ \i in i.k. Prultof 8 6 two ■c eded oaUa ; aBeda separated bj ■ Mm partition. 



