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' high. Leaves 

 oblong, oblanceolate or obovate, sharply and coarsely 

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

 flowers loosely cymose-paniculate, regular, about s" 

 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. Alichaux's Saxifrage. Fig. 2165. 



Saxifraga leucanthemifolia Michx. V\. Bor. 



Am. I : 268. 1803. Not LePeyr. 1803. 

 Hexal<homa petiolaris Raf. Fl. Tell. 2: 67. 



1836. 

 Saxifraga Micliatixii Britton, Mem. Torr. Club 



4: 118. 1S94. 

 Spatnlaria petiolaris Small, N. A. Flora 22-: 



150. 1905. 

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



191 1. 



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

 leaves clustered, oblanceolate or oblong, 

 acute or obtuse at the apex, 3'-"' long, nar- 

 rowed into a margined petiole, coarsely and 

 deeply dentate ; flowering stein naked below, 

 leafy-bracted above; inflorescence widely 

 paniculate; flowers 2"-3" 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 22" long. 



In dry rocky places, mountain suininits of 

 Virginia to Georgia. May-Sept. 



6. SAXIFRAGA [Tourn.] L. Sp. PI. 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 grantilata L, 



Flowers below the terminal nodding flower replaced by bulblets ; petals 4"-$" long. 

 Flowers not replaced by bulblets ; petals about 2" long. 



1. S. cernua. 



2. S. rivularis. 



