SAXIFRAGE FAMILY 389 



13. M. occidentalis (S. Wats.) Small. Leaves spreading, 2-6.5 cm. long, 

 ovate to oblong or oval, dentate or crenate-dentate, usually minutely pubescent 

 beneath; scapes 4-19 cm. tall, copiously glandular-pubescent, very densely so 

 above; sepals ovate, 1.5-2 mm. long, obtuse, occasionally sparingly ciliolate, 

 reflexed; petals white, 2-3.5 mm. long, rounded at the apex, oval to oval-ovate, 

 rather abruptly narrowed below. S. occidentalis S. Wats. Wet places and 

 grassy slopes : Alta. 'Mont. Submont. -Mont. Je-Au. 



14. M. saximontana (E. Nels.) Small. Leaves spreading, 3-9 cm. long, 

 ovate, varying to oblong-ovate or occasionally oblong, dentate or crenate, spar- 

 ingly 'pubescent; scapes 9-19 cm. tall, glandular-pubescent throughout, corym- 

 bosely branched; sepals ovate to oblong-ovate, 1.5-2 mm long, sometimes 

 ciliolate, reflexed; petals white, with 2 yellow blotches, 2-3 mm long, oval to 

 ovate. S. saximontana E. Nels. Moist places: Mont. Wyo. -Ida. B.C. 

 Mont. Submont. My-Au. 



15. M. aestivalis (Fisch. & Mey.) Small. Leaves 4-16 cm. long, the blades 

 suborbicular to reniform, 2-5.5 cm. in diameter, coarsely few-toothed, deeply 

 cordate at the base, glabrous or nearly so; scapes mostly erect, 9-27 cm. tall, 

 somewhat corymbosely branched; sepals oblong to oblong-ovate, 1-1.5 mm. long, 

 ciliate, reflexed; petals white, 3-4.5 mm. long, mostly notched at the apex; 

 blades elliptic-oblong or ovate. S. aestivalis Fisch. & Mey. Along brooks and 

 in wet places: Alaska Alta. Wash.; ne Siberia. Submont. Mont. Jl. 



16. M. arguta (D. Don) Small. Leaves erect or ascending, 9-28 cm. long, 

 the blades suborbicular to orbicular-reniform, 3-9 cm. in diameter, crenate or 



crenate-dentate, deeply cordate at the base, usually glabrous or nearly so; scapes 

 14-46 cm. tall, glabrous or somewhat glandular-pubescent near the top, panicu- 

 late above; sepals lanceolate to oblong, 1.5-2 mm. long, sometimes glandular- 

 ciliolate, reflexed; petals white, with 2 yellow blotches below the middle, 2.5-3.5 

 mm. long, the blades suborbicular or reniform. "S. arguta D. Don. S. punctata 

 Auth. S. denudata Nutt. Springy places: B.C. -Mont. 'N.M. -Calif. Sub- 

 mont. Subalp. Jl-Au. 



20. SPATULARIA Haw. SAXIFRAGE. 



Perennial acaulescent herbs, with erect branching scapes from a caudex. 

 Leaves basal; blades of a spatulate type, or broadest above the middle, toothed, 

 at least near the apex, or rarely entire. Flowers in open cymes, sometimes 

 changed into bulblets. Hypanthium much shorter than the calyx. Sepals 5, 

 reflexed at maturity. Corolla irregular, white. Petals clawed, the three upper 

 with ovate, lanceolate or sagittate blades, the two lower with elliptic or spatu- 

 late blades, or in species bearing a single terminal flower, this difference less pro- 

 nounced. Filaments subulate. Ovary chiefly superior, the carpels united at the 

 base or to below the middle. Follicles erect, with ascending or diverging tips. 



Inflorescence with bulblets. 



Plants with all the flowers represented by clusters of bulblets, or with a single flower 



terminating the main axis. 1. S. Vreelandii. 



Plants with many flowers and some bulblets, at least with a flower terminating each 

 branch of the stem. 2. S. Brunoniana. 



Inflorescence without bulblets. 3. S. ferruginea. 



1. S. Vreelandii Small. Plant 0.6-2 dm. tall, minutely glandular-pubes- 

 cent; leaves crowded on the short caudex, the blades spatulate to linear-spa tu- 

 late, 1.5-6 cm. long, sharply toothed near the apex or above the middle; scape 

 loosely paniculate above or rarely with congested cymes; bracts similar to the 

 leaves, but smaller. High mountains: B.C. Mont. 'Colo. Submont. -Alp. Au. 



2. S. Brunoniana (Bong.) Small. Plants 1-4 dm. tall, glandular-pubescent; 

 leaves crowded on the short caudex, the blades spatulate to oblanceolate-spatu- 

 late, 2-8 cm. long, sharply or sometimes broadly toothed above the middle; 

 scapes rather widely paniculate; bracts much smaller than the leaves; sepals 

 oblong-ovate to triangular-ovate, 1-1.5 mm. long; petals 3.5-6 mm. long, the 3 

 upper with lanceolate or oblong-lanceolate blades, the 2 lower with elliptic .or 

 spatulate-elliptic blades. S. nootkana Moc. S. Bongardi Presl. Mountain sides : 

 Alaska B.C. Mont. Ore. Mont. Subalp. Jl-S. 



