ROSACEiE. (rose FAMILY.) 129 



ding; petals distinct ; sterile filaments 8- 10, yellow, spatulate-linear ; fertile 

 ones 10, white; legume oblong, 5-8-seeded. — Damp soil near the coast, 

 Florida, and westward. June. % — Stems l°-2° long. 



Ordek 48. ROSACE^E. (Rose Family.) 



Herbs, shrubs, or trees, with alternate stipulate leaves, and regular 

 flowers. — Calyx of 3 - 8 (mostly 5) more or less united sejaals, and 

 often with as many bracts. Petals as many (rarely none), inserted 

 with the few or numerous distinct stamens on the edge of the disk 

 which lines the tube of the calyx, mostly imbricated in the bud. 

 Ovaries 1 - several, free, or more or less united with the calyx and 

 with each other, 1 - f ew-ovuled. Seeds anatropous, and, witli few 

 exceptions, without albumen. Embryo straight, with large and 

 thick cotyledons. Fruit various. 



Synopsis. 



Suborder L CHRYSOBALANE^. Calyx bractless, free from the sol- 

 itary ovary. Style single, arising from the base of the ovary. Ovules erect. 

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



1. CHRTSOBALANUS. Calyx limb persistent. Stone grooved. Shrubs. 



Suborder II. AMYGDALE^. Calyx bractless, free from the solitary 

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

 simple. 



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



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

 ing tvith as many bracts, free from the 1 - several ovaries. Style lateral or 

 terminal. Fruit a 1 - 10-seeded follicle, or a 1-seeded achenium. — Herbs or 

 shrubs. Leaves mostly lobed or compound. 



* Fruit a 1 - 10-seeded follicle. 



3. PHYSOCARPUS. Petals imbricated. Carpels inflated, 2-valved. Seed albuminous. 



4. SPIRvEA. Petals obovate or roundish, imbricated in the bud. Carpels 1-valved. 



6. 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. 5). Achenia 1 - 4. 



5. NEVIUSIA. Petals none. Stamens indefinite. Calyx lobes serrate. 



7. AGRIMONIA. Petals 5. Stamens 5-15. Calyx bristly. 



8. POTERIUM. Petals none. Stamens 4. Style terminal. 



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



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

 = Seeds erect. 



10. GEUM. Style persistent. Achenia numerous. 



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



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