SAXIFRAGE FAMILY 379 



as the sepals. Cold woods and peat-bogs: Lab. — Newf. — 'E.G. — Mont.; e 



Asia. Boreal— Mont. My-JI. 



5. MITELLASTRA (T. & G.) Howell. 



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 distinct 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 nmnerous. 



Stamens opposite to the petals. 1. P. peniandra.- 



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) Rydb. 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, obttise. 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-veins 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. irifida. 

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

 toothed. 2. O. violacea. 



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

 divisions, 1-nerved. 



