310 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



126?; Columbia River, Nuttall (type); Mashel Canyon, Piper 2123; Stampede Pass, Hen- 

 derson, July 27, 1892; Horseshoe Basin, Lake & Hull 443; without locality. Cooper. 

 Zonal distribution: Canadian and Humid Transition. 



SAXIFRAGACEAE. Saxifrage Family. 



Staminodia none; caipels 2, distinct, at least above Parnassia (p. 322). 



Staminodia present; carpels 3 or 4, united. 

 Placentae axial. 



Carpels distinct; leaves coriaceous, without stipules . . Leptarrhena ip. 310) 

 Carpels united, at least below. 



Stamens 10 Saxifraga (p. 312). 



Stamens 5. 



Ovary superior Bolandra ( p. 310) . 



Ovary not superior. 



Rootstocks bearing bulblets; ovary al- 

 most wholly inferior Hemieva (p. 311 ) . 



Rootstocks not bearing bulblets; ovary 



half-inferior Therofon (p. 311). 



Petals none; stamens 8 Chrysospleniuivi (p. 318). 



Placentae parietal or nearh' basal. 

 Stamens 8 or 10. 



Petals present ; stamens 10. 



Carpels unequal; petals entire Tiarella (p. 317). 



Carpels equal; petals laciniate Tellima (p. 317). 



Stamens 5 or 3. 



Petals pinnatifid; stamens 5 Mitella ( p. 319). 



Petals entire or none. 



Stamens 5; calyx campanulate or turbinate. Heuchera (p. 320). 

 Stamens 3; calyx tubular Leptaxis (p. 322). 



LEPTARRHENA. 



1. Leptarrhena amplexifolia (Sternb.) Ser. in DC. Prod. 4: 48. 1830. 



Saxifraga amplexifolia Sternb. Rev. Sax. Suppl. 1; 2. pi. 2. 1822. 



Saxifraga pyrolifolia D. Don, Trans. Linn. Soc. 13; 389. 1822. 



Leptarrhena pyrolifolia Ser. in DC. Prod. 4: 48. 1830. 



Type locality. tJnala.ska. 



Range: Alaska to Mount Adams, Washington, and Kootenai Pa.ss, British Columbia. 



Specimens examined: Olympic Mountains, Piper, August, 1895, Mount Ranier, Flett 

 255; Piper 2039, Allen 281; Mount Adams, Henderson, August, 1892, Suksdorf 543, Cas- 

 cade Mountains, latitude 49°, Lyall in 1859, Stevens Pass, Sandberg cfc Leiberg 711; Bridge 

 Creek, Elmer 658, without locality, Vasey in 1889. 



Zonal distribution: Arctic. 



BOLANDRA. 



1. Bolandra oregana S. Wats. Proc. Am. Acad. 14: 292. 1879. 



Type locality: "On wet rocky banks of the Willamette River, near Oregon City, Ore- 

 gon." Collected by Howell. 



Range. Oregon and Washington. 



Specimens examined: White Salmon River, Suksdorf in 1882; Cape Horn, Piper 5021. 



Zonal distribution: Humid Transition. 



