HYDRANGEACE^:. 



1. H. Americana Linn.: scabrous-puberulent and somewhat viscid ; scape 

 mostly naked ; leaves roundish-cordate, with short and rounded dentate- 

 mucronate lobes ; flowers in a loose terminal panicle ; petals spatulate, 

 about as long as the calyx ; stamens at length much exserted. H. cortusa 

 Mich. H. viscida Pursk. 



Shady rocks. N. Y. to Geor. W. to Miss. June, July. %. Scape 23 

 feet high. Leaves deeply cordate. Flowers small, purplish, in a long simple 

 panicle. The root is astringent. American Heuchera. Alum Root. 



2. H. pubescens Pursk. : scape naked, pulverulent-pubescent, nearly 

 smooth below ; leaves orbicular-cordate, smoothish, obtusely lobed ; the 

 lobes crenulate with short slightly mucronate teeth ; flowers in a somewhat 

 thyrsoid panicle ; petals spatulate, longer than the included stamens. 



Mountains and hills. Penn. Md. "Virg. Ky. May, June. %. Scape about 

 a foot high, slender. Flowers nearly half an inch in length. . Calyx segments 

 greenish-white, unequal. Petals violet-purple, veiny. Pubescent Heuchera. 



ORDER LVIIL -ESCALLONIACE^E. ESCALLONIADS. 



Calyx 5-toothed. Petals 5, inserted on the tube of the calyx. 

 Stamens 5, alternate with the petals. Ovary 2 5-celled, with 

 a large polyspermous placenta in the axis ; style simple ; stigma 

 2 5-lobed. Fruit capsular or baccate, surmounted by the 

 persistent style and calyx. Seeds very numerous and minute ; 

 albumen oily. Shrubs, with alternate toothed leaves and con- 

 spicuous flowers. 



ITEA. Linn.ltea. 



(From the Greek treat, n willow ; probably on account of the rapidity of its 

 growth.) 



Calyx campanulate, 5-toothed; the teeth subulate. Petals 

 5, lanceolate-linear, 1 -nerved. Stamens 5, shorter than the pe- 

 tals. Style 1 ; stigma 2-lobed. Capsule 2-celled, 2-parted 

 from the base to the apex. 



7. Virginica Linn. 



Borders of 'swamps. N. J. and Penn. to Flor. and Louis. May, June, fy . 

 Stem 4 8 feet high. Leaves alternate, oblong or oval, acuminate, serrulate, 

 pubescent beneath. Flowers white, in simple terminal racemes. 



Virginian. Itea. 



ORDER LIX. HYDRANGEACE^E. HYDRANGEADS, 



Calyx 4 6-toothed, adhering more or less to the ovary. 

 Petals 4 6, inserted on the calyx, deciduous. Stamens 8 12 

 in 2 rows, or many and distinct. Ovary of 2 5 carpels, ad- 

 hering by their sides ; styles as many as the carpels, distinct, 

 with simple reniform stigmas. Fruit a capsule crowned by 



