saxifragace.t:. (saxifua<;k famii.v.) 171 



4. SULLIVANTIA, Torr. & (iray. 



Calyx bell-shapod, colicring bclmv uiily with tlm l»:i.se of the ovarv, 5-cleft. 

 Petals 5, oblanceolate, entire, acutish, withering-persistent. Stamens 5, shorter 

 than the petals. Cai)sule 2-celle(l, 2 -beaked, many-seeded, opening iMitween 

 the beaks , the seeds wing-margined, ind)rieated upward. — A low and reelined- 

 spreading perennial heri), with rounded and eut-tootlied or slightly lol^d 

 smooth leaves, on slender petioles, anil small white flowers in a branehed lo<»sely 

 rvmose panicle, raised on a nearly leafless slender stem (G- 12' long). Pedun- 

 cles and calyx glandular; pedicels recurved iu fruit. (Dedicated to the di.s- 

 tiiiguished bryologist who discovered our species.) 



1 S. Ohionis, Torr. & Gray. — Limestone cliffs, Ohio to lud., Iowa, and 

 ^iinu. June. 



6. TIARELLA, L. False Mitre-wort. 



Calyx bell-shaped, uearly free from the ovary, 5-parted. Petals 5, with claws, 

 entire. Stamens 10, long and slender. Styles 2. Capsule membranaceous, 

 1 -celled, 2-valved ; the valves unequal. Seeds few, at the base of each parietal 

 placenta, globular, smooth. — Perennials ; flowers white. (Name a diminutive 

 from Tidpa, a tiara, or turban, from the form of the pod, or rather j)i.stil, which 

 is like that of Mitella, to which the name of M'ltre-ivort properly belongs.) 



1. T. COrdifolia, L. Leaves from the rootstock or summer runners 

 heart-sliaped, sharply lobed and toothed, sparsely hairy above, downy beneath ; 

 stem leafless or rarely with I or 2 leaves (5-12' higli) ; raceme simple ; petals 

 oblong, often subserrate. — Rich rocky woods, N. Eug. to Miuu. and lud., and 

 southward in the mountains. April, ^lay. 



6. MI TEL LA, Tourn. IMitre-wort. Bi.siiop'.s-C.\p. 



Calyx short, coherent with the base of the cjvary, .5-cleft. Petals .5, slender, 

 piniiatifid. Stamens .5 or 10, included. Styles 2, very short. Capsule short, 

 2-beaked, 1 -celled, with 2 j)arietal or rather b;vsal several-seeded placent;e, 2- 

 valved at the summit. Seeds smooth .and shining. — Low and slender peren- 

 nials, with round heart-shaped alternate leaves on the rootstock or runners, on 

 slender petioles; those cm the flowering stems opposite, if any. Flowers 

 small, in a simple slender raceme or spike Fruit soon widely dehiscent. 

 (Diminutive of mitra, a cap, alluding to the form of the young pod.) 



1 M. diph^Ua, L. Hairy; leaves heart-s/iaped, acute, soniowhfit 3-5- 

 lobed, t(jotheil, those on the manij-Jiowered stem 2, opposite, nearlij sessile, with 

 interfoliar stipules; flowers white, in a raceme 6-8' long; stamens 10. — 

 Hillsides in rich woods; N. Eng. to N. C, west to Minn, and Mo. May. 



2. M. nuda, L. Small and slender; leaves rounded or ki(lneif-/orm,deei>\y 

 and doubly crenate ; stem usualli/ lea/less, few-Jlowercd , very slender (4 - 6' high) ; 

 flowers greenish ; stamens 10. — Deep moist woods, in moss, N. Eng. to N. Y., 

 Mich., Minn , and iKjrthward. May -duly. 



7. HEUCHERA, L. Alum-root. 



Calyx bell-shaped, the tube cohering at the base with the ovary, 5-cleft. Pet- 

 als . "5, spatulate, small, entire. Stamens 5. Styles 2, slender. Capsule I -celled, 



