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SAXIFRAGACEJE. (SAXIFRAGE FAMILY.) 
Suborder 3. HYDRANGEAS. The Hydrangea Family. 
Shrubs: leaves opposite. Petals valvate in the bud. Calyx-tube 
coherent with the ovary. 
8. Hydrangea. Calyx 4-5-toothed. Stamens 8-10. Pod2-beaked. 
The Suborder 4. Philadelphia.® consists of the genus Philadel¬ 
phia (Mock Orange, also wrongly named Syringa ), of which two 
or three species are commonly cultivated as ornamental shrubs. 
Suborder I. SAXIFRAGES. The True Saxifrage Fam. 
1* SAXIFRAGA, L. Saxifrage. 
Calyx free from, or cohering with, the base of the ovary, deeply 
5-cleft. Petals 5, entire. Stamens 10. Styles 2. Pod 2-beak- 
ed, 2-celled, opening down or between the beaks; or sometimes 2 
almost separate follicles. Seeds numerous, with a close coat. — 
Chiefly perennial herbs, with the root-leaves clustered, those of 
the stem alternate. (Name from sarum , a rock, and frango, to 
break ; most species rooting in the clefts of rocks.) 
* Stems leafy : calyx coherent with the lower part of the pod. 
^ * I ivului'is, L. (Alpine Brook Saxifrage.) Small J 
stems weak, ascending, 3-5-flowered; lower leaves rounded , 3-o* 
o erf, on slender petioles, the upper lanceolate ; petals white , ovate. — 
Alpine region of Mount Washington, New Hampshire, Oakes. Very 
rare. r 
— S. aizoides, L. (Yellow Mountain Saxifrage.) Low, 
in tufts; stems ascending, very leafy below, with few or several co¬ 
rymbose flowers ; leaves linear-lanceolate , fleshy, more or less ciliate; 
petate yellow , spotted with orange , oblong. — Rocky moist banks of 
Fish Creek at Taberg, Oneida County, New York, Knieskem and 
Vasey , 1846. J 
* * Leaves all clustered at the root: flowers on a scape; the panicle 
clammy-pubescent. 
3. S. Aizoon, Jacq. Leaves persistent , spatulate , with while 
cartilaginous toothed margins ; calyx partly adherent; petals obovate, 
cream-color, often spotted at the base. —Moist rocks, Upper Michi¬ 
gan, Pitcher. Scapes 5^-10 / high, sometimes few-leaved below. 
4. S. Virginiensis, Michx. (Early Saxifrage.) Low , 
leaves obovate or oval-spatulate , narrowed into a broad petiole, crenate- 
toothed, thickish ; flowers in a clustered cyme which is at length 
open and loosely panicled ; lobes of the slightly adherent calyx ered , 
not half the length of the oblong obtuse (white) petals ; pods 2, united 
