184 SAXIFRAGACEAE. {Von. IL 
6. Parnassia asarifolia Vent. 
Kidney-leaved Grass-of-Par- 
nassus. (Fig. 1857.) 
Parnassia asarifolia Vent. Jard. Malm. pi. 
39. 1803. 
Scape 10’-20’ high, bearing a clasping 
nearly orbicular leaf at about the middle. 
Basal leaves long-petioled, orbicular or 
much broader than long, rounded, broadly 
kidney-shaped at the base, often 2/—3/ 
wide; flower about 1’ broad; calyx-lobes 
oval, much shorter than the strongly 
veined elliptic petals, which are rather 
abruptly narrowed into a claw; staminodia 
3 in each set, slender, about the length of 
the stamens. 
In wet places, high mountains of Virginia 
and North Carolina. July-Sept. 
10. HYDRANGEA IL. Sp. Pl. 397.1753. 
Shrubs, or some Asiatic species small trees, with opposite simple petioled leaves and ter- 
minal corymbose flowers. Stipules none. Exterior flowers of the corymb often apetalous, 
slender-pedicelled, sterile, but with enlarged and very conspicuous calyx-lobes, or sometimes 
the whole corymb changed to these sterile flowers; fertile flowers small. Calyx-tube hemi- 
spheric or obconic, adnate to the ovary, 4-5-lobed. Petals 4-5. Stamens 8-10, inserted on 
the disk. Filaments filiform. Ovary 2-4-celled; styles 2-4, distinct, or united at the base; 
ovules ©. Capsule membranous, usually 2-celled, ribbed, many-seeded, dehiscent at the 
bases of the styles. [Greek, water-vessel, from the shape of the capsule. ] 
About 35 species, natives of eastern North America, eastern Asia and the Himalayas, and South 
America. Besides the following, another occurs in the southeastern States. 
Leaves glabrous or somewhat pubescent beneath. 1. H. arborescens. 
Leaves densely tomentose beneath. 2. H. radiata. 
1. Hydrangea arboréscens L, 
Wild Hydrangea. (Fig. 1858.) 
HZ. arborescens I,. Sp. Pl. 397. _1753- 
Hydrangea vulgaris Michx. Fl. Bor, 
Am. 1: 268. 1803. 
A shrub, 4°-10° high, the young 
twigs pubescent or glabrate, Peti- 
oles slender, 1’-4/ long; leaves ovate, 
thin, 3/-6’ long, acute or often acu- 
minate at the apex, rounded, cordate 
or rarely broadly cuneate at the base, 
sharply dentate, green both sides, 
glabrous above, sometimes pubes- 
cent beneath; cymes 2/-5’ broad; 
marginal sterile flowers usually few 
or none, but sometimes numerous, 
or forming the entire inflorescence. 
On rocky stream or river banks, 
southern New York and New Jersey, 
very abundant in the valley of the Del- 
aware, to Iowa, south to Florida and 
Missouri. Species variable. Ascends 
to 4200 ft. in North Carolina. June- 
July, sometimes blooming again in 
Sept. 
Hydrangea arboréscens Kanawhana Millsp. Bull. W. Va. Agric. Exp. Sta. 2: 363. 1891. 
Leaves pale or somewhat glaucous beneath. West Virginia. 
