118 KOSACE.E. (UOSE FAMILY.) 



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



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



» 



Synopsis. 



SUBOUDEU I. CHRYSOBALANI'LE. Calyx bractles?, free from 

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

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



1. CIIKYSOBALANUS. Calyx-limb persistent. Stooe grooved. Low shrubs. 



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

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

 Leaves simple. 



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



Suborder III. ROSACEA. Calyx 3 - 5-cleft, the lobes often alto-- 

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

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

 nium. — Herbs or shrubs. Leaves mostly lobed or comjjouud. 



* Fruit a 1 - 10-sccdcd follicle. 



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



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



* # Fruit a 1-sccdcd achenium. 

 *~ Fruiting calyx dry, the lobes mostly valvate in the bud. Achcnia few, or numerous and 

 collected into a head. 

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



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



6. AGUIMOXIA. Petals 5. Stamens 5-15. Calyx bristly. 



7. SANGUISORB.\. Petals none. Stamens 4. Style terminal. 



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



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

 = Seeds erect. 



9. GEUM. Style persistent. Achenia numerous. 



10. WALDSTELMA. Style deciduous. Achenia 2 -6. 



= = Seeds suspended or ascending. 



11. POTENTILLA. Receptacle flat or convex, dry. 



12. FKAGARIA. Receptacle conical, enlarged and fleshy in fruit. 



<-<■ 4-4- <-► Calyx open, bractless. Stamens and juicy achenia numeroufl. 



13. RURUS. Achenia crowded on the conical receptacle. 



<- «- Calyx-tube fleshy, urn-shaped ; the lobes imbricated in the bud. Achenia numerous, 

 Inserted on the receptacle which lines the inside of the calyx-tubo. 



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



Suborder IV. PO^IEiE. Calyx including and cohering with tho 

 1 -T) ovaries, very tiiifk aixl (Icsliy in fruit. 



15. CUAT^OUS. Fruit of 1 5 bony 1 seeded nutlets. 



10. PYltUS. Fnilt of 2 5 rnrtilii(finous or mciiibrnnaceoaB 2-8eedod cells. 



17. AMELANCIIIEK. Fruit of 3 - 6 twOM-eded cells ; seeds separated by a falso partition. 



