2l6 



SAXIFRAGACEAE. 



VOL. II. 



i. Antiphylla oppositifolia (L.) Fourr. Purple or Mountain Saxifrage. 



Fig. 2152. 



Saxifraga oppositifolia L. Sp. PI. 402. 1753. 



Antiphylla oppositifolia Fourr. Ann. Soc. Linn. Lyons 

 II. 16: 386. 1868. 



Tufted, stems prostrate, densely leafy, 2'-io' long. 

 Leaves sessile, ovate, obovate or nearly orbicular, 

 purplish, persistent, keeled, fleshy, opposite, or im- 

 bricated in 4 rows on the sterile shoots, obtuse, 

 punctate with 1-3 pores, i"-2$" long, the margins 

 ciliate; flowers solitary, peduncled or nearly sessile, 

 4"-6" broad; calyx-lobes obtuse, much shorter than 

 the obovate purple petals; calyx free from the ovary 

 and capsule; follicles abruptly short-pointed; seeds 

 rugose. 



On wet rocks, Mt. Mansfield and Willoughby Moun- 

 tain, Vt. ; Anticosti, Newfoundland and throughout 

 arctic America to Alaska, south in the Rocky Moun- 

 tains to Wyoming and to Oregon. Also in Europe and 

 Asia. Summer. 



3. LEPTASEA Haw. Saxifr. Enum. 39. 1821. 



Perennial, gregarious or matted herbs, with copiously leafy caudices and offsets and 

 less leafy flower-stalks, and alternate fleshy or parchment-like entire or 3-pronged leaves, 

 the flowers solitary or in terminal simple or compound cymes. Calyx-lobes 5, often spread- 

 ing or reflexed. Corolla white or yellow, regular, the petals with claw-like bases or claws. 

 Stamens 10; filaments subulate or clavate. Ovary almost superior, the carpels united to 

 above the middle. Follicles erect, except for the more or less spreading tips. [Greek, 

 referring to the small size of the plant.] 



About 18 species, natives of boreal regions and the higher mountains of North America, Europe 

 and Asia. Type species : Saxifraga aizoides L. 



Leaves entire. 



Flowers typically solitary or 2 together; calyx-lobes ciliate. i. L. Hirculus. 



Flowers typically several ; calyx-lobes eciliate. 2. L. aizoides. 



Leaves 3-pronged at the apex. 3. L. tricuspidata. 



i. Leptasea Hirculus (L.) Small. Yellow Marsh 

 Saxifrage. Fig. 2153. 



Saxifraga Hirculus L. Sp. PI. 402. 1753. 



Leptasea Hirculus Small, N. A. Flora 22 2 : 152. 1905. 



Erect from a slender caudex, glabrous or somewhat 

 pubescent, simple, leafy, 4'-io' high. Leaves alternate, 

 oblong or linear-oblong, entire, i'-ij' long, the lower 

 petioled, the upper sessile; flower terminal, solitary 

 (rarely 2-4), bright yellow with scarlet spots, i'-i' 

 broad; calyx-lobes oval or oblong, obtuse, reflexed; 

 petals erect or ascending, obovate or oblong, about 3 

 times as long as the calyx-lobes ; capsule free from the 

 calyx or nearly so, about 4" long, its beaks at length 

 diverging. 



In bogs, Labrador and arctic America. Also in northern 

 and alpine Europe and Asia. Summer. 



