190 



XXXII. ROSACEA. 



[Prunus. 



styles as many, free or connate ; ovules 1 or 2, usually collateral in each 

 carpel, rarely more. Fruit various, a pome, or one or many drupes 

 achenes or follicles, rarely a berry or capsule. Albumen scanty or none ; 

 cotyledons plano-convex, radicle short. Gen. PI. i. 600 ; Eoyle 111. 201 ; 

 Wight 111. i. 199. 



Ripe carpels not enclosed within the calyx-tube. 

 Carpel 1. Fruit a drupe. 



Style terminal ; drupe with a hard, bony stone . . 1. Prunus. 



Style basal ; drape with a coriaceous endocarp . . 2. Prinsepta. 



Carpels many, fruit of many small drupes . . .3. Eubus. 



Ripe carpels enclosed within the calyx -tube. 



Carpels many, 1 pendulous ovule in each. Fruit of many free 



achenes enclosed in the fleshy calyx-tube . . 4. Rosa. 



Carpels 1-5 ; ovules 2 collateral in each carpel ; fruit fleshy, 

 1- 2- or 5-celled. 

 Fruit 2-5-celled ; cells with cartilaginous walls . . 5. Ptrus. 



Fruit a drupe, with 1-5 included stones . . .6. Crat^gus. 



Fruit a drupe, with 3-5 bony half-exserted stones . . 7. Cotoneaster. 



Fruit a drupe, including a 5-celled, dehiscent capsule with 



crustaceous valves . . . . .8. Stranv^esia. 



1. PRUNUS, Linn. 

 Shrubs or trees with alternate, simple, glandular-serrate leaves ; petioles 

 with 2 glands. Flowers white or red, solitary, corymbose or racemose. 

 Calyx deciduous. . Petals 5. Stamens 15-39, perigynous ; filaments free. 

 Carpel 1 ; style terminal ; ovules 2, collateral, pendulous. Drupe with 

 an indehiscent or 2-valved, 1 -seeded, smooth or rugged stone. Seed 

 pendulous ; testa membranous ; albumen scanty or none. 



Flowers fasciculate, umbellate, or solitary. 



Pericarp tough, dry, fibrous ; flowers before the leaves . LP. Amygdalus. 

 Pericarp a soft fleshy pulp. 



Flowers solitary or twin, appearing before or with the 

 leaves. 



Leaves oblong -lanceolate, con duplicate in bud . . 2. P. persica. 



Leaves cordate or ovate, convolute in bud . . 3. P. armeniaca. 



Leaves ovate or ovate-lanceolate, convolute in bud . 4. P. communis. 

 Flowers fasciculate or umbellate, appearing after the leaves. 



Calyx turbinate ; leaves glabrous . . . . 5. P. Cerasus. 



Calyx long-tubular ; leaves white-tomentose beneath . 6. P. prostrata. 



Flowers umbellate, appearing before the leaves . . 7. P. Puddum. 

 Flowers in racemes or corymbs. 



Leaves oblong ; flowers in long drooping racemes . . 8. P. Padus. 



Leaves ovate ; flowers in pedunculate corymbs . . 9. P. Mahaleb. 



1. P. Amygdalus, Baillon Histoire des plantes, i. 415. Syn. Amyg- 

 ddlus communis, Linn. ; Eoxb. Fl. Ind. ii. 500 ; Boissier Fl. Orient, ii. 

 641. The Almond-tree. Vern. Baddm. 



A moderate-sized, deciduous, glabrous tree, with light-green foliage, 

 greyish when full grown. Leaves oblong-lanceolate, conduplicate in bud, 

 serrulate ; petiole glandular, as long as the greatest width of leaf, or longer. 

 Stipules subulate, fimbriate. Flowers white, tinged with red, appearing 

 before the leaves, on short peduncles, twin or solitary, from scaly buds 

 on last year's wood. Calyx campanulate. Drupe velvety, pericarp dry, 

 separating into 2 valves when ripe. Stone compressed, with shallow 





