GROUP V, ANGIOSPERM^E ; DICOTYLEDONES. 



555 



P. Armeniaca is the Apricot; P. domestica is the Wild Plum, it has an 

 ovoid fruit and glabrous shoots : P. insititia is the Bullace, it has a globoid 

 fruit and hirsute shoots. In the. sub-genus Cerasus, P. Cerasus, the Dwarf 

 or Morello Cherry, has foliage-leaves at the base of its umbellate inflor- 



FIG. 367. Diagrammatic longitudinal sections of Rosaceous flowers. A Prunes. 

 B Potentillese. C Roseae. J> Pomea? : fc calyx ; c corolla; /ovaries ; n stigmata. 



escences ; P. Avium, the Wild Cherry or Gean, has only scales at the base 

 of its inflorescences. In the sub-genus Laurocerasus, P. Mahaleb, the 

 Damson, has fragrant bark; P. Padus, the Bird-Cherry, has elongated 

 racemose inflorescences ; P. Laurocerasus, the Cherry-Laurel, has evergreen 

 leaves which somewhat resemble those of the true Laurel ; P. lusitanica is 

 the Portugal Laurel. 



Tribe 4. Poteriecn. Flowers often diclinous : corolla often absent : 

 ovaries few, often but one, monomerous, enclosed in the cavity of the 

 receptacle : ovules solitary, suspended: fruit, a dry receptacle bearing 

 one or more nut-like achenes. 



The genus Alchemilla has tetramerous flowers destitute of a corolla 

 the stamens (4 or fewer) alternate with the sepals ; an epicalyx is present : 

 A. vulgaris, the Lady's Mantle, and A. arvensis, are common. In the 

 genus Poterium, the flowers of the sub-genus Sanguisorba (P. officinale, 

 the great Burnet), have no corolla, the four stamens are opposite the 

 sepals, and they have no epicalyx : the flowers of the sub-genus Poterium 

 (P. Sanyuisorba, the Salad Burnet), resemble those of the preceding, but 

 the stamens are indefinite, and they are polygamous. The flower of 

 Agrimonia is pentamerous ; it has 

 a corolla and indefinite stamens : 

 the outer surface of the receptacle 

 is beset with bristles. 



Tribe 5. PotenlillecK. The ova- 

 ries, which are numerous, are 

 inserted upon a prolongation of 

 the axis into the cavity of the 

 receptacle (Tigs. 367 B and 368 B) ; 

 each usually contains one ovule. FIG. 368. A Flower of the Cherry: pe- 



The calyx is often surrounded by duncle c corolla : a """"ens ; 9 style, pro- 

 , , , , -i jectinjT out of the cavity of the receptacle. 



an epicalyx formed by the con- B Fruit of the Blackberry . EvbutfnticMW , 

 nate stipules of the sepals (Fig. fc calyx; /fleshy ovaries. 



