258 SAXIFRAGACIS^. Tiarella. 



4. TIARELLA. Lmn.; Lam. ill. t. 3nZ ; Endl. gen. AGiZ. nitrh-woht. 



[ From tiara, a kind of hcaO-drcss oi mitre ; in allusion to the form of the capsule.] 



Calyx cainpanulate, nearly free from the ovary, 5-partcd, valvatc. Petals 5, entire. Stamens 

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

 with 2-parietal j>lacenta', 2-valved, the valves very unequal. Seeds few, 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 lobcd, 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 /. 1 ; Michx.Jl. 1. p. 271 ; Bot. mag. t. 1589 ; Pursh, 

 Jl. I. p. 313; Tan: Jl. \. p. 415 ; Bigel. fl. Bost. p. 178 ; DC. prodr. 4. p. 50 ; Torr. ^ 

 Gr. jl. N. Atn.l. 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, rougliish-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. CHRYSOSPLENIUAL Tourn. ; Endl. gen. 4638. golden saxifrage. 



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



virtues of the genus.] 



Cal}rx-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 

 placentas 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 ojiposite crenate leaves, and small yellowish-grcen flowers. 



1. Chrysosplenium Americanum, Schwcin. Golden Saxifrage. 



Stems prostrate, dichotomous above ; leaves ojjpositc, the ujiper ones often alternate, 



