280 LXV. SAXIFRAGACE. TusReLa. 
rolla inferior, of 5 small, entire petals, inserted with the 5 stam amens 
on the throat of the calyx; capsule 1-celled, 2-beaked, many-seeded. 
— Lws. radical, long-petioled. | Near veld (7 ae Seangan 
1. H. Americana. Alwm-root. : 
Viscid-pubescent; lvs. roundish, cordate, somewhat '7-lobed, lobes short 
and roundish, crenate-dentate, teeth mucronate ; panicle elongated; loose; pedi- 
céls divaricate ; cal. short, obtuse; pet. spatulate, about as long as the calyx; 
sta. much exserted.—A neat plant, rare in the southern parts of NN. Eng. an 
N. Y., frequent at the W.! and S. Leaves all radical, 2—34' diam., on. peti- 
oles 2—8’ in length. Scape 2—4f high, paniculate, nearly } this length. Pe- 
duncles 2—3-flowered. Calyx campanulate, more conspicuous than the purplish- 
white petals. May, Jn.—Root astringent, hence the common name. = 
2. H. pusescens. Ph. (H. grandiflora. Raf.) 
Scape naked, minutely-pubescent above, and with the long petioles, gla- 
brous below; Jvs. glabrous, orbicular-cordate, 7—9-lobed, lobes rounded, and 
with rounded, mucronate, ciliate teeth; ped. cymose, dichotomous, joints flexu- 
ous, almost geniculate; fis. large; pet. longer than the included stamens; sty. 
exserted.— Mts. Penn., Md! Va. Scape 1—2f high. Leaves 3—5’ diam., the 
veins beneath with a few scattered hairs. Flowers 5—6” long, purple. May, Jn. 
3. H. Ricnarpsont. R. Br. . 
Scape ae and petioles hairy and rough; Jvs. orbicular-cordate, with 
a deep sinus, 5—7-lobed, lobes obtuse, incisely crenate, ciliate; panicle rather 
contracted ; cal. somewhat oblique; pet. ciliolate, somewhat unequal, about the 
.ength of the sepals; sta. a little exserted ; sty. included.—Prairies and bottoms, 
[a.! to Mo., N. to Can. Scape 1—2fhigh. Leaves glabrous above, veins be- 
neath hairy. Flowers 6—7"” long. May. 7 aie 
4, MITELLA. Tourn. 
A Lat. diminutive from mitra, a mitre. See Tiarella. 
Calyx 5-cleft, campanulate; petals 5, pectinately pinnatifid, insert- 
ed on the throat of the calyx; stamens 5 or 10, included; styles 2, 
short’; capsule 1-celled, with 2 equal valves —% . 
1. M. pipHyiia. Currant-leaf. Bishop’s Cap. 
Lws. cordate, acute, sublobate, serrate-dentate, radical ones on pag Bet 
oles, cautine 2, opposite, subsessile—Very common in the woods of N. Eng. to 
Can. and Ky. Stem a foot or more high, bearing the pair of leaves near the 
midst. Leaves 1—3/ long, uearly as wide, hairy, on hispid petioles 2—6’ long. 
Flowers on short pedicels, arranged in a long, thin spike or raceme, and most 
beautifully distinguished by the finely divided white petals. Seeds black and 
shining. May—Jn. 
2. M.nupa. (M. prostrata, Mz. M. cordifolia. Lam.) Dwarf Mitelia. 
Lvs. orbiculate-reniform, doubly crenate, with scattered hairs above ; scape 
filiform, few-flowered, naked or with a single leaf; pet. pinnatifid with filiform 
segments.—A very delicate species, growing in damp, rich, shady woodlands 
at Potsdam, N. Y., and in Northern N. Eng. Leaves and stems light green, 
pellucid. Scape 4—6’ high, terminating in a thin raceme of white flowers, 
with finely pinnatifid petals. They are erect or prostrate, and send out creep- 
ing stolons from the base. Leaves #/ long and of nearly the same width. Jn: 
5. TIARELLA. 
Lat. tiara, a mitre or some other head-dress, from the resemblance of the capsule. 
ST. corpirouia. Mitre-wort. Gem-fruit. 
Lvs. cordate, acutely lobed, mucronate-dentate, pilose; scape racemose ; 
