SAXIFRAGACEjE. 11 



usually only one low down on the stalk. Flower an inch 

 across, the petals imich longer than the calyx. — Beaver 

 meadows and wet banks. 



2. P. palustris, L. Sterile flaments 9-15 in each set. 

 Scapes 3-10 inches high. Flower nearly an inch across, the 

 petals not much longer than the sepals. Leaves cordate. — 

 Sandy banks. 



3. P. parviflo'ra, DC. Petals but little longer than the 

 sepals. Sterile filaments about 7 in each set. Leaves ovate 

 or oblong. — Atl. Prov. and northward. 



3. SAXIF'KAGA, L. Saxifrage. 



1. S. Virginien'siS, Michx. (Early Saxifrage.) Stem 

 4-9 inches high. Scape clammy. Leaves obovate, crenate- 

 ly toothed.. Petals white, oblong, twice as long as the sepals. 

 — Eocks and hillsides. 



2. S. trieuspida'ta, Eetz. stems tufted, 4-8 inches high. 

 Leaves alternate, oblong or spathulate, with 3 rigid sharp 

 teeth at the end. Petals yellow. — Chiefly N. and N.W. 



3. S. AiZO'On, Jacq. Scape 5-10 inches high. Leaves 

 thiik, spathulate, with white finely -toothed margins. Petals 

 cream-colour, obovate, often spotted at the base. — Moist 

 rocks, Atl. sea-coast and northward. 



4. MITEIi'lA, Toui-n. Mitre-wokt. Bishop's-Cap. 



1. M. dlphyl'la, L. (Two-leaved Mitre-wort.) Stem 

 hairy. Leaves cordate, 3-5-lobed, those on the scape 2, op- 

 posite, nearly sessile. Flowers white, oblong. - -Eich woods. 



2. M. nuda, L. (Naked-stalked M.) Stem small and 

 delicate. Leaves kidney-shaped, doubly crenate. Scape 

 leafless, few-flowered. Flowers greenish. — Deep woo^s, on 

 moss-covered logs, etc. 



5. TIAKEL'IA, L. FALSE MiTRE-WORT. 

 T. eOFdifO'lia, L. Scapes leafless, 5-12 inches high 

 Leaves heart-shaped, sharply toothed, sparsely hairy above 

 downy beneath. Petals white, oblong. — Kich woods. 



