SAXIFRAGE FAMILY 379 



as the sepals. Cold woods and peat-bogs: Lab. Newf. B.C. Mont.; e 

 Asia. Boreal -Mont. My-Jl. 



6. MITELLASTRA (T. & G.) HoweU. 



Slender glandular pubescent perennials, with scaly rootstocks and lateral 

 leafy flowering shoots. Inflorescence racemose. Hypanthium saucer-shaped, 

 adnate only to the base of the gynoecium. Sepals 5, triangular, valvate in aesti- 

 vation. Petals pectinately pinnatifid, with filiform divisions. Stamens 5, opposite 

 the sepals; filaments slender, about two-thirds as long as the sepals. Gynoecium 

 neaily wholly superior, with 2 parietal many-ovuled placentae. Styles 2, dis- 

 tinct, slender, tapering into the stigmas. Capsule as in Mitella. 



1. M. caulescens (Nutt.) Howell. Flowering branches 1-3-leaved, puberu- 

 lent and somewhat hirsute, 1.5-3 dm. high; basal leaf-blades broadly cordate or 

 reniform, 5-7-lobed, with triangular-ovate lobes and crenate, hirsute on both 

 sides, 3-5 cm. broad; stem-leaves similar but short-petioled, alternate; flowers 

 yellowish green; hypanthium with the calyx about 5 mm. wide; sepals broadly 

 triangular. Mitella caulescens Nutt. Shady woods: B.C. Mont. Ida. 

 Calif. Submont. My-Jl. 



6. PECTIANTHIA Raf. 



Low perennials, with scaly rootstocks and lateral, scapiform flowering 

 branches. Inflorescence racemose. Hypanthium saucer-shaped, wholly adnate 

 to the depressed ovary. Sepals 5, triangular or ovate, reflexed, valvate in aesti- 

 vation. Petals 5, pectinately pinnatifid, with filiform divisions. Stamens 5, 

 on the margin of a distiact disk, which covers the ovary; filaments very short, 

 inflexed; anthers reniform. Gynoecium 1-celled, depressed, mostly inferior, 

 with 2 parietal, but almost basal placentae. Stigmas 2, subsessile, 2-lobed at 

 the apex. Seeds numerous. 



Stamens opposite to the petals. 1. P. pentandra. 



Stamens opposite to the sepals. 2. P. Breweri. 



1. P. pentandra (Hook.) Rydb. Flowering branches scapiform, naked, 

 1-3 dm. high; blades of the basal leaves broadly cordate, coarsely crenate, and 

 with 9-11 more or less distinct round lobes, thin, 3-6 cm. in diameter; raceme 

 lax, with the flowers not rarely in pairs; hypanthium with the calyx 3-3.5 mm. 

 wide, green, often purplish inside; sepals broadly triangular. Mitella pentandra 

 Hook. Mossy banks, in the woods: Alaska Alta. Colo. Calif. Mont. 

 Subalp. Je-Au. 



2. P. Breweri (A. Gray) Ilydb. Flowering branches 1-2 dm. high, scapi- 

 form, leafless, very sparingly hairy; blades of the basal leaves reniform, with many 

 shallow rounded lobes, serrate-crenate, thin, sparingly hairy on both sides or 

 glabrous, 4-7 cm. broad; flowers green, occasionally in pairs; hypanthium with 

 the calyx 3-4 mm. wide; sepals very broadly ovate, obtuse. M. Breweri A. Gray. 

 Damp woods in the mountains: Alta. Ida. Calif. B.C. Mont. Subalp. 

 Je-Au. 



7. OZOMELIS Raf. MITREWORT. 



Perennials, with scaly rootstocks and lateral scapiform flowering shoots. 

 Leaves basal, long-petioled, with rounded-reniform or cordate blades. Inflor- 

 escence racemose. Hypanthium campanulate, adnate to the lower half of the 

 ovary. Sepals 5, ovate or oblong, erect, valvate in aestivation. Petals 5 or 

 lacking, 3-cleft, toothed or entire. Stamens 5, opposite to the sepals; disk obso- 

 lete; filaments short, erect; anthers reniform. Gynoecium half-inferior, 1-celled, 

 with 2, parietal, many-ovuled placentae; styles 2, very short; stigmas capitate. 



Midvein of the sepals branched; side- vein* simple; petals cuneate or oblanceolate, with 



lanceolate lobes or entire. 



Petals cuneate, about twice as long as the sepals, 3-fld with subequal divisions. 



1. O. trifida. 

 Petals oblanceolate, slightly exceeding the sepals, entire or slightly and unequally 



toothed. 2. O. violacea. 



Midveins 9f the sepals simple; lateral veins branched; petals filiform or 3-fld, with filiform 

 divisions, 1-nerved. 



