146 SAXIFRAGACE.E. (SAXIFRAGE FAMILY.) 



6. TIARELLA, L. FALSE MITRE-WOKT. 



Calyx campanulate, nearly free front the ovary, 5-parted. Petals 5, entire. 

 Stamens 10. Styles 2. Capsule membrauaceous, 2-valved, the valves very 

 unequal, 1 -celled, few-seeded. Seeds globular, smooth. Perennial herbs, 

 with scape-like steins, chiefly radical and petioled leaves, and small racemose 

 flowers. 



1. T. COl'difolia, L. Leaves round-cordate, creuately or acutely lobed 

 and toothed, hairy above, pubescent beneath, on long hairy petioles ; scape 

 (6' -12' high), naked, or bearing 1-2 alternate leaves above the middle; ra- 

 cemes simple or branched, many-flowered ; petals oblong, white or purplish. 

 Rocky woods and banks along the mountains. April -May. 



7. MITELLA, Tourn. MITRE-WORT. 



Calyx coherent with the base of the ovary, 5-cleft. Petals 5, pinnatifid. 

 Stamens 10. Styles 2. Capsule 2-beaked, 1 -celled, 2-valved at the apex, 

 many-seeded. Seeds smooth, borne on two parietal placentas. Perennial 

 herbs, with broadly cordate and lobed leaves, and small flowers in a terminal 

 raceme. 



1. M. diphylla, L. Hairy; radical leaves cordate, acute, coarsely ser- 

 rate and slightly 3-lobed, on long petioles ; stem leaves 2, opposite, sessile ; 

 raceme slender, loosely many-flowered. Shady woods, on the mountains of 

 North Carolina. May. Stem 6' -12' high. Flowers white. 



8. CHRYSOSPLENIUM, Tourn. GOLDEN SAXIFRAGE. 



Calyx tube coherent with the ovary, 4 - 5-loLed ; the lobes obtuse and yel- 

 low within. Petals none. Stamens 8 - 1 0, very short, inserted on a conspic- 

 uous disk. Styles 2. Capsule very short, 2-lobed, 1-celled, with 2 parietal 

 placentae, 2-valved at the apex, many-seeded. Smooth succulent herbs, with 

 roundish leaves, and solitary greenish flowers. 



1. C. Americanum, Schweinitz. Stems prostrate, forking; leaves 

 mostly opposite, roundish, slightly lobed ; flowers in the forks of the stem. 

 Cold and shady banks of streams, on the mountains. April - May. 2/ 



Stems 4' - 6' long. 



9. ITEA, L. 



Calyx campanulate, 5-cleft, free from the ovary. Petals 5, lanceolate. 

 Stamens 5, shorter than the petals. Styles 2, united. Capsule 2-celled, 2-fnr- 

 rowed, septicidally 2-valved, several-seeded. A slender branching shrub, 

 with simple oblong or oval serrate pubescent leaves, and long mostly drooping 

 racemes of white fragrant flowers terminating the branches. 



1. I. Virginica, L. Swamps and wet banks. May- June. Shrub 

 4- 10 high. Leaves H'-3' long. 



10. HYDRANGEA, Gronov. 



Calyx tube hemispherical, 8- 10-ribbed, coherent with the ovary; the limb 

 4-5 toothed, persistent. Petals ovate, valvate in the bud. Stamens 8-10, 

 filiform. Capsule crowned with the two diverging styles, 2-celled, many-seeded. 



