HyprRAnceEA. LXV. SAXIFRAGACES. 281 
stolons creeping.—Common in rocky woods Can. to Penn., and generally asso- 
ciated with Mitella diphylla, which plant, in its general aspect, it much resem- 
bles. The scape arises from a creeping root-stock about 10’ high, often bear- 
ing a leaf. Leaves 2—3'long,# as wide, hairy, and on hairy petioles 4—6/ 
long. Racemes 1—23’ long; fis. wholly white, with minute bracts, May, Jn. 
6. CHRYSOSPLENIUM. Tour. 
Gr. xproos, gold, o7A7v, the spleen; on account of the medicinal qualities. 
Calyx adnate to the ovary, 4—5-lobed, more or less colored inside ; 
corolla 0; stamens 8—10, superior, short; styles 2; capsule obcor- 
date, compressed, 1-celled, 2-valved, many-seeded.— Small, aquatic 
herbs. 
C. Americinum. Schw. (C. oppositifolium. Michz.) Water-carpet. 
Iws. opposite, roundish, slightly crenate, tapering to the petiole—A small 
lant, in springs and streams, spreading upon the muddy surface. Stem square, 
inches long, divided in a dichotomous manner at top. Leaves opposite, 
3/ in length, smooth. Calyx 4-cleft, greenish-yellow, with purple lines. Corol- 
la 0. Stamens 8, very short, with orange-colored anthers, which are the only 
conspicuous part of the flower. The terminal flower is sometimes decandrous. 
Apr. May. 
SUBORDER 2—-ESCALLONIE SX. 
71TEA. 
Gr. name for the willow ; from a resemblance of foliage. 
Calyx small, with 5, subulate segments ; petals 5, lance-linear, in- 
flexed at the apex, inserted on the calyx; stamens 5, inserted into 
the calyx ; styles united ; capsule 2-celled, 2-furrowed, 8—12-seeded. 
—A shrub with alternate, simple leaves, and a simple, spicate, terminal 
raceme of white flowers. 
~ T. Virernica. 
Margins of swamps and sluggish streams, N. J. and Penn. to Flor. 
Shrub about 6f high. Leaves 13—3’ long, oval-acuminate, serrulate, on short 
etioles. Capsule oblong, acuminate with the style, its two carpels separating 
in maturity. May, Jn. 
SuporDER. 3.—H YDRANGE E. 
Petals valvate. Capsules 2-celled. Leaves opposite, exstipulate. Survuss. 
8. HYDRANGEA. 
G7. vdwo, water, ayytov, a vessel ; because the cultivated species require so copious a supply of water. 
Marginal flowers commonly sterile, with a broad, rotate, 4—5-cleft, 
colored calyx, and with neither petals, stamens nor styles. Fertile fl. 
Calyx tube hemispherical, adherent to the ovary, limb 4—5-toothed, 
persistent ; petals ovate, sessile ; stamens twice as many as the petals; 
capsule 2-beaked, opening by a foramen between the beaks; seeds 
numerous.—Shrubs with opposite leaves. Fils. cymose, generally radiant. 
1. H. arzorescens. (H. vulgaris. Michz.) Common Hydrangea. 
Lvs. ovate, obtuse or cordate at base, acuminate, serrate-dentate, nearly 
smooth ; fis. in fastigiate cymes.—An elegant shrub, native in the Middle and 
Western States! cultivated in the Northern, attaining the height of 5 or 6f on 
its native shady banks. Fertile flowers small, white, becoming roseate, very 
numerous. ‘The cultivated varieties have either the marginal flowers radiate, 
or all sterile and radiate. + 
2. H. quercirouia. Bartram. Oak-leaved Hydrangea.—Luvs. deeply sinuate- 
lobed, dentate, tomentose beneath ; cymes paniculate, radiant, the sterile flowers 
very large and numerous.—A beautiful shrub, native of Flor., not uncommon 
