KOSACEiE. (HOSE FAMILY.) Ill 



Teibe I. SPIRiEEiE. Pistils mostly 5, forming follicles in fruit : styles terminal. 



2. SPI1LEA. Calyx 5-cleft. Petals obovate, equal, imbricated in the bud. 



3. GILLEXIA. Calyx elongated, 5-toothed. Petals slender, unequal, convolute in the bud. 



Tribe II. DRYADE^E. Pistils numerous (rarely 1-2), forming seed-like achenia or 

 little drupes in fruit. Calyx-tube dry in fruit ; the lobes commonly valvate in the bud. 



Subtribe 1. Sangcisorbi;.e. Calyx-tube constricted at the throat. Petals often wanting. 

 Stamens 4-15. Pistils 1-4, dry in fruit, enclosed in the calyx. 



4. AGRIMONIA. Petals 5. Stamens 12-15. Pistils 2: style terminal. 

 6. SANGUISORBA. Petals none. Stamens 4. Pistil 1 : style terminal. 

 6. ALCIIEMILLA. Petals none. Stamens and pistils 1 - 4 : style lateral. 



Subtribe2. Chamjeriiode.£. Calyxopcn. Stamens & pistils 5 -10: styles lateral. Fruit dry. 

 7 SIBBALD1A. Stamens 5, alternate with the minute petals. 



Subtribe 3. Eodryade.£:. Calyx open. Stamens and pistils few — many. Fruit of dry 

 achenia, tipped with terminal styles. Seed erect. (Radicle inferior.) 



8. DRYAS. Calyx8-9-parted. Petals 8 - 9. Styles persistent, plumose. 



9. GEUM. Calyx 5-cleft. Petals 5. Achenia numerous : stj Irs pi 



10. WALDSTEINTA. Calyx 5-cleft Achenia few: styles deciduous from the base. 



Subtribe 4 Fragarieje. Calyx open and flattish, bracteolate. Stamens and pistils numer- 

 ous : styles often lateral, deciduous Fruit of dry achenia. Seed suspended or ascend- 

 ing, inserted next the base of the style. (Radicle always superior.) 



11. POTENTILLA. Receptacle dry, flat, convex, or oblong. 



12. FRAGARIA Receptacle conical, enlarged and succuleut in fruit, edible. 



Subtribe 5. Dalibarde.e. Calyx open, not bracteolate. Stamens and usually the pistib 

 numerous : styles termini!, deciduous. Achenia mostly flesh}-, or becoming little drupes 

 Seed suspended (ovules 2, collateral : radicle superior). 



13. DALIBARDA. Fruit of 5 - 10 almost dry achenia, in the bottom of the calyx. 



14 RUBUS. Fruit of numerous (rarely few) pulpy drupaceous achenia, aggregated on a flat- 

 tish or elongated receptacle. 



Tribe III. ROSEiE. Pistils numerous, forming achenia, inserted on the hollow recep- 

 tacle which lines the urn-shaped and fleshy calyx-tube. Calyx-segments imbricated. 



15. ROSA. Leaves pinnate : stipules cohering with the petiole. 



Suborder III. POME^l. The Pear Family-. 



Calyx-tube thick and fleshy in fruit (forming a. pome), including and co- 

 hering with the 2-5 ovaries. Stipules free. 



16. CRATiEGUS. Carpels bony in fruit, 1-seeded. 



17. PYRUS. Carpels papery or cartilaginous in fruit, 2-seeded. 



18. AMELANCHIER. Carpels cartilaginous, each divided into 2 cells by a partition : ceRs 1- 



seeded. 



Suborder I. AMYODALEjE. The Almond Family. 



1. P RUN US, L. Plum & Cherry. 



Calyx 5-cleft. Petals 5, spreading. Stamens 15-30. Ovary with 2 pen- 

 dulous ovules. Drape fleshy; the stone smooth and even. — Small trees or 

 shrubs. Flowers commonly white. (The ancient classical name of the 

 Plum.) 



