258 SAXIFRAGACEJ:. Tiarella. 



4. TIARELLA. Linn. ; Lam. ill. t. 373 ; Endl. gen. A6i3. MITRE-wort. 



[ From tiara, a kind of head-dress or mitre ; in allusion to the form of the capsule.] 



Calyx campanulate, nearly free from the ovary, 5-parted, valvate. Petals 5, entire. Stamens 

 10 : filaments exserted. Styles 2 : stigmas simple. Capsule membranaceous, 1-celled, 

 with 2-parietal placentae, 2-valved, the valves very unequal. Seeds fewr, near the base of 

 the capsule, smooth and shining. — Perennial herbs, with simple cordate or trifoliolate in- 

 cised and serrate leaves. Flowers small, paniculate or racemose, white. Bracts minute. 



1. Tiarella cordifolia, Linn. Heart-leaved Mitre-wort. 



Leaves simple, cordate, acutely lobed, and unequally dentate with mucronate teeth, strigose- 



ly hairy, pubescent underneath ; scape naked ; raceme simple ; petals oblong, clawed. — 



Linn. sp. 1. j). 405 ; Lam. ill. t. 373 f. 1 ; Michx.Jl. 1. p. 271 ; Bot. mag. t. 1589 ; Pursh, 



ft. 1. p. 313 ; Torr. fl. 1. p. 445 ; Bigel. fi. Bost. p. 178 ; DC. prodr. 4. p. 50 ; Torr. 4. 



Gr.Jl. N. Am. 1. p. 587. 



Stolons creeping, leafy. Radical leaves on long petioles, 2-3 inches in diameter. Scape 

 6-12 inches high, sometimes with a small leaf about the middle, roughish-pubescent. 

 Raceme many-flowered; the pedicels 4-6 lines long. Segments of the calyx white, obovate- 

 oblong, obtuse. Petals white, spreading, as long as the calyx. Stamens longer than the 

 petals. Ovary of 2 unequal carpels, which are distinct at the summit and attenuated into 

 short styles, opening by the inner suture at a very early period. Capsule elongated : valves 

 oblong, very unequal, erect, or very slightly diverging. Seeds black and shining, with a 

 prominent raphe. 



Shady moist woods, and in swamps ; northern and western part of the State. May - June. 



5. CHRYSOSPLENIUM. Tourn. ; Endl. gen. 4638. golden saxifrage. 



[ From the Greek, chrysos, gold, and splen, the spleen ; a figurative name, given in allusion to the supposed medicinal 



virtues of the genus.] 



Calyx-tube cohering with the ovary, 4 - 5-lobed ; the lobes colored inside. Petals none. 



Stamens 8-10, inserted on the margin of a toothed disk that surrounds the ovary. Styles 



2, distinct, short, tapering. Capsule with 2 short spreading beaks, 1-celled with 2 parietal 



placentffi at the base, 2-valved at the summit. Seeds numerous, spherical. — Annual or 



perennial, smooth, subaquatic, and mostly prostrate plants, with somewhat fleshy alternate 



or opposite crenate leaves, and small yellowish-green flowers. 



1. Chrysosplenium Americanum, Schwein. Golden Saxifrage. 



Stems prostrate, dichotomgus above ; leaves opposite, the upper ones often alternate, 



