380 LXV. SAXIFRAGACEA. Tiarexlaw 



rolla inferior, of 5 small, entire petals, inserted with the 5 stamens 

 on the throat of the calyx; capsule 1-celled, 2-heaked, many-set ded. 



— % IjVS. radical J long-petioled. 



1. H. Americana. Alum-root. 



Viscid-pubescent; Ivs. roundish, cordate, somewhat 7-lobed, lobes short 

 and roundish, crenate-dentate, teeth mucronate ; panicle elongated, loose; pedi- 

 cels divaricate ; cal. short, obtuse ; pet. spatulate, about as long as the calyx j 

 zia. much exserted.— A neat plant, rare in the southern parts of N. Enj . and 

 N. Y., frequent at the W. ! and S. Leaves all radical, 2 — 34' diam., on peti- 

 oles a— 8' in length. Scape 2— 4f high, paniculate, nearly I this length. Pe- 

 duncles 2— 3-flov/ered. Calyx campanula te, more conspicuous than the puij)lish- 

 white petals. May, Jn. — Root astringent, hence the common name. 



2. H. puEEscENs. Ph. (H. grandiflora. Raf.') 



Scape naked, minutely-pubescent above, and with the long petioles, gla- 

 brous below; Zr5. glabrous, orbicular-cordate, 7— 9.-lobed, lobes rounded, and 

 with rounded, mucronate, ciliate teeth; ped. cymose, dichotomous, joints lexu- 

 ous, almost geniculate; fls. \a.Yge ; pet. longer than the included stamem ; shj. 

 exserted.— Mts. Penn., Md! Va. Scape 1— 2f high. Leaves 3—5' dian-., the 

 veins beneath with a few scattered hairs. Flowers 5 — 6" long, piuple. May, Jn, 



3. H. RicHARDsoNi. R. Br. 



Scape (naked) and petioles hairy and rough; Irs. orbicular-cordate. wilS 

 a deep sinus, 5 — 7-lobed, lobes obtuse, incisely crenate, ciliate ; panicle lathe? 

 contracted; cal. somewhat oblique; pet. ciliolate, somev/hat unequal, aboit the 

 .ength of the sepals; sta. a little exserted; sty. included.— Prairies and bo'toms, 

 la. ! to Mo., N. to Can. Scape 1— 2f high. Leaves glabrous above, veir s be- 

 neath hairy. Flovzers G— 7" long. May. 



4, MI TEL LA. Tourn. 



A Lat. diminutive from vdtra, a mitre. See TUtreUa. 



Calyx 5-cleft, campanulate; petals 5, pectinately pinnatifid, ii sert« 

 ed on the throat of the calyx ; stamens 5 or 10, included ; styles 2^ 

 short ; capsule 1-celled, with 2 equal valves. — % 



1. M. DiPiiYLLA. Curravt-4eaf. Bishop's Cap, 



Lis. cordate, acute, sublobate, serrate-dentate, radical ones on long peti- 

 oles, cauiine 2, opposite, subsessile. — Very common in the woods of N. E:ig. to 

 Can. and Ky. ' Stem afoot or more high,' bearing the pair of leaves ne. r the 

 midst. Leaves 1—3' long, nearly as wide, hairy, on hispid petioles S— 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. NUDA. (M. prostrata, Mx. M. cordifolia. Lam.) Dtcarf MiteUa. 

 Lvs. orbiculate-renfform, doubly crenate, with scattered hairs above; scape 



filiform, few-flowered, naked or with a single leaf; pet. pinnatifid with filiform 

 seoments —A very delicate species, growing in damp, rich, shady woocHands 

 at'PotRdam, N. Y., and in Northern N. Eng. Leaves and stems light ;,Teen, 

 pellucid Scape 4— G' high, terminating in a thin raceme of white flcwers, 

 with finelv pinnatifid petals. They are erect or prostrate, and send out creep- 

 ins stolons from the base. Leaves f ' 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 . 



Calyx 5-parted, the lohe^ obtuse ; petals 5 ; entire, the claws in- 

 serted on the calyx ; stamens 10, exserted, inserted into the calyx ; 

 styles 2 ; capsule 1-celled, 2-valved, one valve much larger.—'^ Flow- 

 ers white. 



T. CORDIFOLIA. Mitre-wort. Gem-fruit. 



Lvs. cordate, acutely lobed, mucronate-dentate, pilose ; scape racemose j 



