VOL. II.] 



SAXIFRAGE FAMILY. 



7. Saxifraga Aizoon Jacq. Livelong Saxi- 

 frage. (Fig. 1829.) 



Saxifraga Af~oon]acq. Fl. Austr. 5: 18. pi. 438. 1778. 



Leaves clustered in a dense rosette at the base of the 

 bracted flowering scape; plant spreading by offsets, so that 

 several are often joined together. Leaves 4 // -i2 // long, 

 spatulate, thick, obtuse and rounded at the apex, the 

 margins serrulate with sharp hard white teeth; scape 

 erect, viscid-pubescent, 4 / -io / high; flowers several or 

 numerous, corymbose, yellowish, about 3 // broad; calyx- 

 lobes ovate-oblong, obtuse, viscid, shorter than the obo- 

 vate, often spotted petals; capsule tipped by the divergent 

 styles, its base adnate to the calyx. 



On dry rocks, Mt. Mansfield, Vermont; Quebec to Labra- 

 dor, west to Lake Superior and Manitoba. Also in alpine 

 and arctic Europe. Summer. 



8. Saxifraga caespitosa L,. Tufted Saxifrage. 

 (Fig. 1830.) 



Saxifraga caespitosa L. Sp. PI. 404. 1753. 



Densely tufted, leaves clustered at the base, spatulate or 

 fan-shaped, 3 // ~9 // long, deeply 3-5-cleft or lobed into linear 

 obtuse segments, glabrous; flowering stem erect, 2 / -8 / high, 

 viscid-pubescent, at least above, linear-bracted or with several 

 3-lobed leaves; flowers i-S, corymbose, 4 // -7 // broad, white; 

 calyx-lobes ovate-oblong, obtuse or obtusish, much shorter 

 than the obovate petals; capsule-tips divergent; base of the 

 capsule adnate to the calyx. 



On rocks, Quebec, Labrador and Newfoundland, west through 

 arctic America to Alaska, south to Oregon and in the Rocky 

 Mountains to Colorado. Also in arctic and alpine Europe and 

 Siberia. Summer. 



9. Saxifraga Pennsylvanica L,. Pennsylvania or Swamp Saxifrage. 



(Fig. 1831.) 



Saxifraga Pennsylvanica L. Sp. PI. 399. *-*. (*\ 



1753- 

 Saxifraga Forbesii Vasey, Am. Entom. & 



Hot. 2: 288. 1870. 



Scape stout, terete, viscid-pubescent, 

 l0 -3# high, bracted at the inflores- 

 cence. Leaves large, oval, ovate, obovate 

 or oblanceolate, pubescent or glabrate, 4'- 

 10' long, 1%'-$' wide, obtuse at the apex, 

 narrowed at the base into a broad petiole, 

 the margins denticulate or repand; cymes 

 in an elongated open panicle; flowers 

 greenish, regular, i W-2%" broad; calyx- 

 tube nearly free from the ovary, its lobes 

 ovate, obtusish, reflexed, one-half shorter 

 than the lanceolate or linear-lanceolate 

 petals; filaments subulate or filiform ; fol- 

 licles ovoid, their tips divergent when 

 mature. 



In swamps and on wet banks, Maine to 

 southern Ontario and Minnesota, south to 

 Virginia, Iowa and Missouri. May. 



