SAXIFRAGACEAE. 479 



spatulate, parchment-like, 8-14 mm. long, narrowed at the base, sessile, the mar- 

 gins ciliate; flowers corymbose, 8-10 mm. broad; sepals ovate, coriaceous, much 

 shorter than the petals; lower part of capsule adnate to the calyx. In rocky 

 places, Newf. and Lab. to Alaska, south to Lake Superior and in the Canadian 

 Rocky Mts. Also in arctic Europe. Summer. 



7. Saxifraga Aizoon Jacq. LIVELONG SAXIFRAGE. (I. F. f. 1829.) Leaves 

 in a rosette; plant spreading by offsets. Leaves 8-24 mm. long, spatulate, thick, 

 obtuse; scape viscid-pubescent, 1-2.5 dm. high; flowers corymbose, about 6 mm. 

 broad; calyx-lobes ovate-oblong, obtuse, viscid, shorter than the obovate, often 

 spotted petals; base of capsule adnate to the calyx. On dry rocks, Vt.; Quebec to 

 Lab., Lake Superior and Manitoba. Also in Europe. Summer. 



8. Saxifraga caespitosa L. TUFTED SAXIFRAGE. (I. F. f. 1830.) Tufted; 

 leaves spatulate or fan-shaped, 6-18 mm. long, glabrous; flowering stem 5-20 cm. 

 high, viscid-pubescent, at least above, linear-bracted or with several 3-lobed leaves; 

 flowers 1-8, corymbose, 8-14 mm. broad; calyx-lobes ovate-oblong, obtuse or ob- 

 tusish, much shorter than the petals; base of the capsule adnate to the calyx. On 

 rocks, Quebec, Lab. and Newf. to Alaska, Ore. and Colo. Also in Europe and 

 Siberia. Summer. 



9. Saxifraga Pennsylvanica L. PENNSYLVANIA OR SWAMP SAXIFRAGE. 

 (I. . f. 1831.) Scape stout, terete, viscid-pubescent. Leaves oval to oblanceolate, 

 10-25 cm. long, 3-7 cm. wide, obtuse at the apex, narrowed at the base into a broad 

 petiole; cymes in an elongated panicle; flowers greenish, regular, 3-5 mm. broad; 

 calyx-tube nearly free from the ovary, its lobes ovate, obtusish, reflexed, one-half 

 shorter than the linear-lanceolate petals ; filaments subulate or filiform. In swamps 

 and on wet banks, Me. to Ont., Minn., Va., Iowa and Mo. May. 



10. Saxifraga micranthidifolia (Haw.) B. S. P. LETTUCE SAXIFRAGE. 

 (I. F. f. 1832.) Scape slender, viscid. Leaves oblanceolate or oval, sometimes 3 

 dm. long, obtuse, tapering downward into a long margined petiole; panicle loose, 

 elongated; flowers white, regular, 4-6 mm. broad; calyx-lobes reflexed, slightly 

 shorter than the oval or oblong obtuse petals; calyx-tube free from the ovary; fila- 

 ments club-shaped. In cold brooks, Penn. to N. Car. May-June. 



11. Saxifraga Virginiensis Michx. EARLY SAXIFRAGE. (I. F. f. 1833.) 

 Scape viscid-pubescent, 1-3 dm. high. Leaves obovate or oval, narrowed into a 

 margined petiole, dentate or crenate, 2-7 cm. long or longer; flowers white, 

 regular, 4-6 mm. broad; calyx-lobes erect, triangular-ovate, much shorter than the 

 obtuse petals; ovary nearly free from the calyx; carpels nearly separate. In dry 

 or rocky woodlands, N. B. to Minn., Ga. and Tenn. March-May. 



12. Saxifraga nivalis L. CLUSTERED ALPINE SAXIFRAGE. (I. F. f. 1834.) 

 Resembling the preceding, but seldom over 15 cm. high. Scape viscid, naked, or 

 bracted at the base of the capitate inflorescence; leaves ovate or oval, narrowed 

 into a margined petiole, thicker; flowers white, 6-10 mm. broad; calyx-lobes ovate 

 or oblong, obtuse, about one-half the length of the petals; ovary half-inferior; 

 follicles deep purple, divergent. Lab. and arctic Am., south in the Rocky Mts. to 

 Ariz. Also in Europe and Siberia. Summer. 



13. Saxifraga comosa (Poir.) Britton. FOLIOSE SAXIFRAGE (I. F. f. 1835.) 

 Scape slightly viscid, 5-15 cm. high. Leaves oblanceolate, cuneate, den- 

 tate and mostly obtuse, 8-18 mm. long; flowers white, regular; calyx nearly free 

 from the ovary, its lobes reflexed. much shorter than the sagittate petals. Me. ; 

 Lab. and arctic America; Mt. Evans, Colo. Also in Asia and Europe. Summer. 



14. Saxifraga stellaris L. STAR OR STARRY SAXIFRAGE. (I. F. f. 1836.) 

 Scape bracted at the inflorescence, 1-3 dm. high. Leaves oblong, oblanceolate or 

 obovate, sharply dentate, tapering into a broad petiole. 1-5 cm. long; flowers about 

 I cm. broad; petals white, yellow-spotted at the base; calyx nearly free from the 

 ovary, its lobes reflexed, lanceolate, obtusish, about one-half the length of the ob- 

 long petals ; capsule 4-6 mm. long. In rocky places, reported from Lab. and 

 Greenland. Also in Europe and Asia. Summer. 



15. Saxifraga Grayana Britton. GRAY'S SAXIFRAGE. (I. F. f. 1837.) Glan- 

 dular-pilose, scapose from a corm-like rootstock ; scape 1.5-4.5 dm. tall. Basal 

 leaves oblong to nearly orbicular, 2-12 cm. long, crenate-dentate, narrowed into 

 margined petioles, mostly shorter than the blade ; flowers white, 8-10 mm. broad; 

 calyx-tube adnate to the ovary, its segments ovate-oblong, reflexed, obtuse; petals 



