2 24 



SAXIFRAGACEAE. 



Vol. II. 



cescent. Stamens 5, inserted at the base of the calyx-lobes. Filaments short. Ovary 2-celled. 

 2-beaked, ripening into a 2-beaked capsule. Styles 2. Ovules 00. Seeds winged on both 

 sides. [Named in honor of William Starling Sullivant, 1803-1873, American botanist.] 



Four known species, the following of eastern North America, the others of the western States. 

 Type species : Saxifraga Sultivantii T. & G. 



"^ I. Sullivantia SuUivantii (T. & G.) 



Britton. Sullivantia. Fig. 2171. 



Saxifraga (?) SuUivantii T. & G. Fl. N. A. i : 



575. 1840. 

 5*. ohionis T. & G. Am. Journ. Sci. 42 : 22. 1842. 

 Sullivantia SuUivantii Britton, Mem. Torr. 



Club 5; 178. 1894. 



Stem scapose, nearly leafless, weak, re- 

 clined, slightly glandular-pubescent, 6'-i5' 

 long. Leaves long-petioled, i'-3' wide, and 

 wider than long, reniform-cordate at the 

 base, crenate-dentate or somewhat lobed, 

 sparingly pubescent or glabrous ; panicle 

 ample, sometimes leafy-bracted, loose, 

 glandular; pedicels slender, recurved in 

 fruit ; flowers white, about 2" broad ; calyx- 

 lobes ovate, not nerved, acutish ; petals 

 spatulate, entire, exceeding the stamens. 



On cliffs, Ohio and Indiana. June. 



Sullivantia Hapemanii (Coult. & Fisher) 

 Coulter, with 3-nerved calyx-lobes and obo- 

 vate or oval-rhombic petal-blades, has been 

 found in Wisconsin and Minnesota and ranges 

 to Wyoming and Colorado. 



II. TIARELLA L. Sp. PI. 405- i753- 

 Perennial slender erect herbs, with the leaves mainly basal, long-petioled, lobed or 

 3-foliolate, small stipules adnate to the petiole, and white pedicelled racemose or paniculate 

 flowers. Calyx-tube campanulate, nearly or quite free from the base of the ovary, its limb 

 5-lobed. Petals 5, clawed. Stamens 10; filaments elongated. Ovary i-celled; styles 2 ; ovules 

 ». Capsule membranous, i-celled, 2-valved, the valves usually unequal. Seeds usually few, 

 ovoid or globose, smooth, not winged. [Diminutive of tiara, from the form of capsule.] 



About 6 species, natives of North America, Japan and 

 the Himalayas. Besides the following, and one in the 

 southern Alleghanies. 5 others occur in the western 

 parts of North America. Type species : Tiarella cordi- 

 foUa L. 



I. Tiarella cordifolia L. Coolwort. False 

 Mitrewort. Fig. 2172. 



Tiarella cordifolia L. Sp. PI. 405. 1753. 



Scape 6'-i2' high, slender, pubescent. Leaves 

 long-petioled, broadly ovate, or nearly orbicular, 

 cordate at the base, 3-7-lobed, obtuse or acutish at 

 the apex, 2'-4' long, crenate or dentate all around, 

 pubescent with scattered hairs above, glabrate or 

 downy along the veins beneath; inflorescence simply 

 racemose or the lowest pedicels sometimes branched, 

 glandular-puberulent ; flowers white, about 3" broad ; 

 petals oblong, entire or slightly dentate, clawed, 

 somewhat exceeding the white calyx-lobes; capsule 

 reflexed, about 3" long, its valves very unequal. 



In rich moist woods, Nova Scotia to Ontario and 

 Minnesota, south, especially along the mountains, to 

 r.eorgia, Indiana and Michigan. Ascends to 5600 ft. in 

 Virginia. White coolwort. Foam-flower. Gem-fruit. 

 April-May. 



12. HEUCHERA L. Sp. PL 226. 1753. 



Erect or ascending perennial herbs, with mainly basal long-petioled ovate or orbicular 

 leaves, and small paniculate or racemose, white green or purple flowers, on naked or leafy- 

 bracted scapes. Calyx-tube campanulate, often oblique, adnate to the base of the ovary, 

 5-Iobed. Petals small, spatulate, often shorter than the calyx-lobes, entire, inserted on the 



