120 SAXIFRAGACEAE (SAXIFRAGE FAMILY) 



MM. Carpels 2. 

 N. Inflorescence a panicle. 

 O. Stamens 10; leaves 3-foliolate (except T. unifoliala). 



TIARELLA (p. 120) 



OO. Stamens 5; leaves simple. HEUCHERA (p. 121) 



NN. Inflorescence a raceme. 



P. Stamens 10. TELLIMA (p. 122) 



PP. Stamens 5. 



Q. Flowering branches leafless. MITELLA (p 122) 



QQ. Flowering branches leafy. 

 R. Sepals triangular; petals pinnatifid. (See Q.) 

 RR. Sepals ovate; petals entire to 3- or s-cleft at apex. (See P.) 



BOYKINIA 



Perennial, glandular-pubescent. Flowers in panicles. Leaf blades reni- 

 form, variously cleft or lobed, dentate or crenate. Calyx segments 5. 

 Petals white or purple. Stamens 5, opposite the sepals. Ovary \ in- 

 ferior, 2-celled; styles 2. Follicle beaks 2, divergent. Seeds shining. 

 (Honor of a Dr. Boykin, of Georgia.) 



A. Petals white. 



B. Stipules none or mere bristles. W. C. B. major 



BB. Stipules wider, scarious or foliaceous. W. C. B. occidentalis 



AA. Petals dark purple. E. B. heucheriformis 



HEMIEVA 



Perennials, glandular-puberulent. Basal leaves ternately divided or 

 crenate only. Flowers in a panicle. Calyx segments 5. Petals obovate. 

 Stamens 5, opposite the sepals. Ovary \-\ inferior, 2-celled; styles 

 2. (Possibly Gk. hemi = , L. aemim = an age ; in reference to its half- 

 perennial form, through budding in the leaf axils.) 



A. Petals white, with short claw; ovary % inferior. C. E. H. ranunculifolia 



AA. Petals violet, with long claw; ovary f inferior. E. H. violacea 



SAXIFRAGA (SAXIFRAGE) 



Herbs, but sometimes shrubby, chiefly perennial. Leaves alternate, 

 simple. Flowers small, in clusters. Sepals 5. Petals on the calyx tube 

 when there is one, entire or 2-toothed. Stamens 10. Carpels usually 2, 

 rarely 3-6 ; ovary of as many cells ; fruit with as many beaks. (L. saxum 

 = rock, frangere = to break ; because many species grow in rock clefts.) 

 Species too difficult for beginners. (F. & R. pp. 197-199.) 



TIARELLA (COOLWORT) 



Perennial. Stipules present. Flowers in racemes or panicles. Calyx 

 tube small, short-campanulate. Petals clawed or filiform. Stamens 



