PHILADELPHUS— HYDRANGEA 183 



ends of branches or axillary, white and scentless, 3-5 cm. broad, calyx- 

 lobes lanceolate, about 1 cm. long, petals ovate 1.5-2 cm. long; fruit a 

 top-shaped capsule, 9-12 mm. long : grandiflorus, large-flowered. 



Distributed from Va. to Tenn. and Fla. 



Grown in parks and yards as an ornamental shrub and entirely hardy. 

 Flowers in June, fruit ripe in August. 



Philadelphus coronarius Linne 1753 Mock Orange Garden 



Syringa 



A shrub 2-3 meters (6-9 ft.) high, with smooth grayish bark, young 

 twigs reddish, glabrous; leaves oval or elliptic, rounded at the base, 

 acuminate at the apex, margin with sharp and distant teeth, mostly 5- 

 veined, glabrous above, mostly pubescent below, 4-7 Cm. long, 2-5 cm. wide, 

 short petioled; flowers in racemes at the ends of branches, cream-colored, 

 3-4 cm. broad, calyx-lobes lanceolate, 5-6 mm. long, petals ovate, 12-16 

 mm. long; fruit a top-shaped capsule, 7-10 mm. long; coronarius, 

 crown-like. 



Frequently cultivated as an ornamental shrub, and quite hardy, escaped 

 from gardens in Va. to 111. Native of central Europe. Blossoms in June, 

 fruit ripe in August and September. 



Hydrangea Linne 1753 



(Gr. hydro, water, a n g e i o n, vessel, referring to the shape of 



the fruit) 



Shrubs with opposite or whorled, simple leaves ; flowers white or tinged 

 with pink, in terminal, compound cymes, the marginal ones usually sterile 

 and consisting of a large, membranous, flat, colored calyx, fertile flowers 

 small, calyx-tube hemispherical, adnate to the ovary, 5-lobed, petals 4-5, 

 ovate, stamens 8-10, ovary 2-4 celled, styles 2-4, distinct; fruit a many- 

 ribbed, many-seeded capsule, opening between the styles. 



A genus of about 35 species, natives of eastern North America, east- 

 ern Asia and the Himalayas, and South America. Three species occur in 

 the southeastern states. 



Key to the Species 



1. Leaves ovate, mostly cordate at base, flower 



cluster nearly flat-topped H. arborescens 



2. Leaves ovate-lanceolate, flower cluster pyrami- 



dal, large H. paniculata 



