GENUS 5. 



SAXIFRAGE FAMILY. 



221 



2. Hydatica stellaris (L.) S. F. Gray. Star 

 or Starry Saxifrage. Fig. 2164. 



Saxifraga stellaris L. Sp. PI. 400. 1753. 



Hydatica stellaris S. F. Gray, Nat. Am. Brit. PI. 2 : 530. 

 1821. 



Scape naked below, bracted at the inflorescence, 

 glabrous or slightly viscid, 4'-i2 r high. Leaves 

 oblong, oblanceolate or obovate, sharply and coarsely 

 dentate, tapering into a broad petiole, $'-2' long; 

 flowers loosely cymose-paniculate, regular, about 5" 

 broad ; petals white, yellow-spotted at the base ; calyx 

 nearly free from the ovary, its lobes reflexed, lanceo- 

 late, obtusish, about one-half the length of the ob- 

 long acutish petals, .which are narrowed into a short 

 claw ; capsule 2"-3" long, its tips acuminate, at length 

 somewhat divergent. 



In rocky places, reported from Labrador and Green- 

 land. Also in arctic and alpine Europe and Asia. Kid- 

 neywort. Summer. 



3. Hydatica petiolaris (Raf.) Small. Michaux's Saxifrage. Fig. 2165. 



Saxifraga leucanthemifolia Michx. Fl. Bor. 



Am. i: 268. 1803. Not LePeyr. 1803. 

 Hexaphoma petiolaris Raf. Fl. Tell. 2: 67. 



1836. 

 Saxifraga Michauxii Britton, Mem. Torr. Oub 



4: 1 1 8. 1894. 

 Spatularia petiolaris Small, N. A. Flora 22 2 : 



150. 1905. 

 H. petiolaris Small, Fl. SE. U. S. Ed. 2, 760. 



1911. 



Erect, viscid-pubescent, 6'-2o' high. Basal 

 leaves clustered, oblanceolate or oblong, 

 acute or obtuse at the apex, $'-f long, nar- 

 rowed into a margined petiole, coarsely and 

 deeply dentate ; flowering stem naked below, 

 leafy-bracted above ; inflorescence widely 

 paniculate ; flowers 2"-$" broad, irregular ; 

 petals clawed, white, the 3 larger ones sagit- 

 tate or truncate and usually with a pair of 

 yellowish spots at the base, the outer 2 

 spatulate and unspotted, narrowed at the 

 base; calyx-tube free from the ovary, its 

 lobes reflexed ; follicles lanceolate, sharp- 

 pointed, little divaricate, about 2\" long. 



In dry rocky places, mountain summits of 

 Virginia to Georgia. May-Sept. 



6. SAXIFRAGA [Tourn.] L. Sp. PL 398. 1753. 



Perennial herbs, with flowering stems arising from the small rootstocks and alternate, 

 entire or 3-7-lobed leaves. The flowers solitary or in terminal cymes, rarely represented by 

 bulblets. Calyx-lobes 5, erect, usually with a terminal gland. Corolla white, regular, the 

 petals somewhat narrowed at the base, but usually clawless. Stamens 10; filaments subulate. 

 Ovary about one-half inferior, the carpels united to about the middle. Follicles well united, 

 erect, except the more or less spreading tips, partly included in the calyx-tube. [Greek, 

 stone-breaking, from reputed medicinal qualities.] 



About 20 species, most abundant in the cooler parts of the northern hemisphere. Type species : 

 Saxifraga granulata L. 



Flowers below the terminal nodding flower replaced by bulblets; petals 4"-s" long. i. S. cernua. 

 Flowers not replaced by bulblets ; petals about 2" long. 2. 5". riz'tilaris. 



