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. Saxirrace FAMILY. 
Staminodia none; carpels 2, distinct, at least above .....-. -- PARNASSIA (p. 322). 
Staminodia present; carpels 3 or 4, united. 
Placentae axial. 
Carpels distinct; leaves coriaceous, without stipules .. LeprarrHENa (p. 310) 
Carpels' united, at least below. 
Stamens 10 ......-.--------------- eee ee eee SAXIFRAGA (p. 312). 
Stamens 5. 
Ovary superior .......-.--..------------ Bo.anpra (p. 310). 
Ovary not superior. 
Rootstocks bearing bulblets; ovary al- 
most wholly inferior ..............- Hemigva (p. 311). 
Rootstocks not bearing bulblets; ovary 
half-inferior ......-..-.---------+- THEROFON (p. 311). 
Petals none; stamens 8 ....--.-------------+- CurysosPLENiuM (p. 318). 
Placentae parietal or nearly basal. 
Stamens 8 or 10. 
Petals present; stamens 10. 
Carpels unequal; petals entire ............ TIARELLA (p. 317). 
Carpels equal; petals laciniate ............ Teitima (p. 317). 
Stamens 5 or 3. 
Petals pinnatifid; stamens 5 ........-.--.--- .. MIrELLa (p. 319). 
Petals entire or none. 
Stamens 5; calyx campanulate or turbinate. Heucnera (p. 320). 
Stamens 3; calyx tubular .........-.--.-.- Lepraxis (p. 322), 
LEPTARRHENA. 
1. Leptarrhena amplexifolia (Sternb.) Ser. in DC. Prod. 4: 48. 1830. 
Saxifraga amplexifolia Sternb. Rev. Sax. Suppl. 1: 2. pl. 2. 1822. 
Saxifraga pyrolifoa D. Don, Trans. Linn. Soc. 18: 389. 1822. 
Leptarrhena pyrolifolia Ser. in DC. Prod. 4: 48. 1830. 
Tyre Locauity. Unalaska. 
Rance: Alaska to Mount Adams, Washington, and Kootenai Pass, British Columbia. 
SPECIMENS EXAMINED: Olympic Mountains, Proper, 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 & 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. 
Rance. Oregon and Washington. 
SPECIMENS EXAMINED: White Salmon River, Suksdorf in 1882; Cape Horn, Piper 5021. 
ZONAL DISTRIBUTION: Humid Transition. 
