492 



ARBORETUM ET FRUTICETUM BRITANNICUM. 



E. pulverulenta Pers., Stereoxylon pulverulentum Ruiz et Pav., is a 

 shrub, hairy in every part, with white flowers ; growing to the height of 8 or 

 10 feet. It is a native of Chili; and plants of it were in the Horticultural 

 Society's Garden from 1831 till 1837-8. Twenty other species are described 

 in Don's Miller, iii. p. 193. to p. 195., all natives of South America, and proba- 

 bly as hardy as those above mentioned ; but it does not appear that any of 

 them have been introduced. 



ORDER XXXIV. SAXIFRA V GE.E, 



TRIBE HYDRA'NGE,E. 



ORD. CHAR. Calyx 4 5-parted. Petals 5, inserted between the lobes of the 

 calyx. Stamens 5 or 10. Disk perigynous. Ovarium of 2 to 5 carpels. 

 Stigmas sessile. Fruit 1 2-celled. Seeds numerous, minute. Albumen 

 fleshy. Absence of stipules distinguishes this from ^osaceae and Cunow- 

 dcece. (G. Don.) 



Leaves simple, opposite, exstipulate, deciduous. Flowers in large co- 

 rymbs, pink or white, often sterile. Suffruticose shrubs, natives of North 

 America and Asia. Easily propagated by cuttings, and growing freely in any 

 soil that is rather moist. 



GENUS I. 



HYDRA'NGEA L. 



THE HYDRANGEA. 



Di-Trigynia. 



Lin. Syst. Decandria 



Identification. Lin. Gen., 557.; Dec. Prod., 4. p. 13. ; Don's Mill., 3. p. 232. 

 Synonymes. Hydr&ngea, and Hortensza Juss. ; Idrangea, Ital. 



Derivation. From hudor, water, and aggos, a vessel ; with reference to some of the species which 

 grow in water ; or, as some suppose, from the capsule resembling a cup. 



Gen. Char. Flowers generally deformed ; but some of them hermaphrodite 

 and fertile. Calyx tube hemispherical, 10-ribbed, rather truncate, 

 adnate to the ovarium ; limb permanent, 5-toothed. Petals 5, regular. 

 Stamens 10. Styles 2, distinct. Capsule 2-celled, with introflexed valves, 

 crowned by the teeth of the calyx and styles, flattish at the top, opening by 

 a hole between the styles. Seeds numerous, reticulated. (Don's Mitt.} 



Leaves simple, opposite, exstipulate, deciduous ; serrated or lobed. Flow- 

 ers corymbose, pink, or yellowish white ; the marginal ones sterile, and 

 large, in consequence of the teeth of the calyx being dilated into broad, 

 petal-like-coloured segments ; the rest of the sterile flower partially abor- 

 tive. Shrubs, natives of North America and Asia. 



A. Species Natives of North America. 

 & 1. H. ARBORE'SCENS L. The arborescent Hydrangea. 



Identification. Lin. Sp., p. 5G8. ; Don's Mill., 3. p. 232. ; Lodd. Cat., ed. 



1836. 

 Synonymes. H. vulgaris Michx. Fl. Bor. Amer. 1. p. 268. ; H. frutesceus 



Mcench Meth. 1. p. 106. 

 Engravings. Bot. Mag., t. 437. ; and our fig. 899. 



Spec. Char., Sfc. Leaves ovate, rather cordate ; superior 

 ones lanceolate, coarsely toothed, pale and puberulous 

 beneath. Corymbs flattish. Flowers nearly all fertile. 

 Flower buds obtuse. Flowers white, small, having an 

 agreeable odour. (Don's Mill.) A low shrub. Penn- 



899. H, arborf'scens. 



