DICOTYLEDONS. 97 



the apex, serrate, smooth above, densely white-toinentose beneath ; 

 cymes flat-topped ; sterile flowers few, but large and conspicuous. 

 May-June. On rich soil, river banks, etc. 



2. H. QUERCiFOLiA Bart. Oak-leafed Hydrangea. Shrub, 

 3-6 ft. tall ; leaves oval, usually 5-lobed, serrate, tomentose ; cymes 

 clustered in a dense, oblong panicle ; sterile flowers large and numer- 

 ous, whitish, becoming purple. ]\Iay-June. On shady banks. 



3. H. HORTENSis L. Garden Hydrangea. Shrub 1-3 ft. 

 tall ; leaves elliptical, acute at each end, serrate-dentate, smooth, 

 strongly veined ; cymes convex above ; flowers nearly all sterile, 

 white, blue, or pink. May-July. Common in gardens. 



IV. PHILADELPHUS. 



Shrubs; leaves simple, opposite, 3-5-ribbed, petioled, ex- 

 stipulate ; flowers solitary or cymose, large, white ; calyx 

 tube turbinate, cohering with the ovary, the limb 4-5-parted, 

 persistent ; petals 4-5, rounded or obovate ; stamens 20-40, 

 shorter than the petals ; ovary o-5-celled, many-seeded, styles 

 3-5, more or less united. 



1. P. GRANDIFLORUS Willd. LaRGE-FLOWERED SyRINGA. 



Shrub, G-10 ft. high; branches pubescent; leaves ovate or ovate- 

 oblong, acuminate, sharj^ly serrate, pubescent, 3-ribbed ; flowers soli- 

 tary or 2-3 together, white, 11^-2 in. broad, not fragrant; calyx 

 lobes ovate, acuminate, about twice as long as the tube. April- 

 May. On low ground. 



2. P. coRONARius L. Garden Syringa. Shrub, 8-10 ft. 

 high ; leaves oval or ovate, obtuse at the base, acute at the apex, 

 remotely denticulate, smooth above, pubescent beneath ; flowers in 

 terminal racemes, creamy white, 1-1 ? in. wide, very fragrant; calyx 

 lobes ovate, acute, longer than the tube. May-June. Common in 

 cultivation. 



53. GROSSULARIACE^. GOOSEBERRY FA^HLY^ 



Shrubs ; branches smooth or i)rickl3' ; leaves alternate, 

 often fascicled, palmately veiued and lobed ; stipules want- 

 ing; flowers axillary, racemose or clustered; calyx tube 

 adherent to the ovary, limb 5-parted, persistent; petals 5, 

 small; stamens 5; ovary l-cidled, with 2 parietal placentae; 

 fruit a many-seeded berry. 



