118 ROSACE^:. (UOSK FAMILY.) 



ovulc'd. Seeds anatropous, and, with few exceptions, without albumen. 

 Embryo straij^ht, with hirge and thick cotyk'don.s. Fruit various. 



Synopsis. 



SuBOUDKii I. CIIRYSOBALANEiE. 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. CHUYSOBALANUS. Calyx-Iimb persistent. Stone grooved. Low shrubs. 



SuBOKDKU n. AjNIYGDALE^E. Calyx bractless, free fiom the sol- 

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

 Leaves simple. 



2. PRUNUS. Caljx-lioib deciduous. Stone even, or grooved on the margins. 



SuBORDEK III. ROSACEA. Calyx 3 - 5-cleft, the lobes often alter- 

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

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

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



* Fruit a 1 - lO-seeded follicle. 



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



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



* * Fruit a Iseeded achcnium. 

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

 collected into a head. 

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



4. NEVTUSL\. Petals none. Stamens indefinite. Calyx-lobes serrate. 



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



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



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



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

 = Seeds erect. 



9. OEUM. Style persistent. Achenia numerous. 



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



= = Seeds suspended or ascending. 



11. POTENTILLA. Receptacle flat or convex, dry. 



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



++ 4+ ^.^ Calyx open, bractless. Stamens and juicy achenia numerous. 



13. RUBUS. 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-tube. 



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



Suborder IV. PO^ME.'E. Calyx including and cohering with the 

 1-5 ovaries, very thick and fleshy in fruit. 



15. CRAT^GUS. Fruit of 1 - 5 bony l-seeded nutlets. 



16. PYKUS. Fruit of 2 - 5 cartilaginous or membranaceous 2-seeded cells. 



17. AMELANCIIIER. Fruit of 3 -5 two-seeded cells ; seeds separated by a false partition. 



