HYDRANGEACEAE 597 
Calyx of usually 4-10 sepals, surmounting the often ribbed up a 
Corolla of mostly 4-10 petals. Androecium of 8-many stamens. (Gynoe- 
eium of 2-5, or rarely of 10, united carpels. Ovary wholly | or partially 
inferior. Fruit eapsular.—About 16 genera and 80 species, natives of tem- 
perate and tropieal regions. 
Sepals, and petals, 5 or fewer: styles and stigmas mostly distinet: stigmas when 
united b e 
Sta mu 8-10: corolla relatively small; petals : ANGEA. 
Stam s 12-20, or more: corolla large; petals Convolite: 2. PHILADELPHUS. 
Sepals, ind petals, 7 or more: styles united : stigma depressed. 3. DECUMARIA. 
| 1 HYDRANGEA [Gronov.] L. Shrubs. Leaf-blades toothed or lobed. 
Sepals 4 or 5, minute, or iine in the marginal flowers. Petals valvate, 
small, white or greenish. Stamens 8-10. Styles wanting. Capsule opening 
between the stigmas.—Abou ey sce American and Asiatic.—Spr.-sum.— 
HYDRANGEAS. eee air ot species are grown as ornamental shrubs. 
They are hardy northward of their natural range. 
i an merely toothed: inflorescence corymbose; sterile 
ers around the edge. I. RADIATEAE. 
cs Dind deeply lobed: inflorescence paniculate, sterile flowers 
throughout the panicle, II. QUERCIFOLIAE. 
I. RAD E 
Leaf-blades e or e pom beneath: hypanthium mostly 
wider than 1. H. arborescens. 
Leaf-blades COUSDICHOUEÍS and D pubescent beneath: 
ypanthium mostly higher r than 
Leaf-blades membranous, light-gray ? bonas. 2. H. cinerea. 
Leaf-blades leathery, bright-white beneath. 3. H. radiata. 
II. QUERCIFOLIAE 
Spreading or sprawling shrub, with large panicles. 4. H. quercifolia. 
1. H. arborescens L. Shrub with sparingly pubescent branches and twigs: 
leaf-blades thin, ovate, oval or elliptic: petals 1-1.5 mm. long: capsule-body 
2-2.5 mm. lon broader than high.— oo 
darc HYDRAN GEA.  SMOOTH-HYDRAN- 
SEVEN-BAR K.)— Woods and stream- 
ae various provinces, Fla. to La., and 
Ne X. 
H. cinerea Small. Shrub with copiously 
or sede pubescent twigs: hypanthium 
about 2 mm. wide at maturity: petals 1.5—2 
mm. long: capsule body b rau higher than 
broad.— (ASH —Woods, Blue 
Ridge and jui ns provinees, Ga. to 
Ala., Tenn., and N. C. 
3. radiata Walt. dd. with oe 
pubescent twigs: hypanthium about 2.5 
at maturity: ns -flowers few: petals 1-15 mm. long: capsule often 
smaller Dan that of H. cinerea.—(SNOWY-HYDRANGEA. SILVER-LEAF.)— Rocky 
slopes, Blue Ridge and Piedmont, S. C. and N. C. 
. quercifolia Bartr. Shrub ie densely e tomentose meu ses 
wide at ma ray- 
are usually also arachnoid: hypanthium 3-3.5 
d. poder becomin M purple: ‘petals 1 5-2 m n E ie Loue body about 
h.—(GRAY-BEA D-MAN'S SEVEN-BARK. OAK-LEAF 
3 hig OL 
i e Se D bluffs aa ee, “Coastal Plain, extending into 
adj. provinces, N Fla. to Miss. 4 Tenn., and Ga. 
