240 SAXIFRAGACEAE (SAXIFRAGE FAMILY) 



hispid-ciliate: flowers few, in a crowded glomerule at summit: calyx minutely 

 glandular-pubescent, its whole tube adnate to the carpels: petals broadly 

 obovate-cuneate, truncately rounded at summit, twice as long as the calyx- 

 lobes, distinctly divergently 3-nerved: the distended subglobose calyx-tube 

 papillose-rugose from the pressure upon it by the numerous brown seeds 

 within. S. adscendens. (Muscaria delicatula Small, 1. c. 129.) High moun- 

 tains, Colorado to Montana. 



9. Saxifraga micropetala (Small) A. Nels. Plants 2-6 cm. tall, rather 

 copiously glandular-pubescent: leaves compactly crowded on the caudices, 

 the blades 5-9 mm. long, 3-lobed at the apex, the lobes linear or oblong- 

 linear: flower-stalks relatively stout, 1-3-flowered, each bearing 2 or 3 leaves: 

 hypanthium about 3 mm. long at maturity: sepals broadly ovate, obtuse or 

 acutish, about 2 mm. long: petals oval or oval-obovate, about 1.5 mm. long, 

 clawless: follicles 5-6 mm. long. (Orig. desc. as Muscaria micropetala Small, 

 1. c.) Wyoming and Utah. 



10. Saxifraga caespitosa L. Sp. PL 404. 1753. Dwarf (3-5 cm. high), 

 caespitose: leaves glandular-pubescent, 3-5-cleft, segments broadly linear 

 and obtuse; the upper leaves linear and entire: flowering stems with a few 

 scattered leaves, glandular, 1-4-flowered: petals obovate, much longer than 

 the ovate-oblong obtuse calyx-lobes: base of the carpels adnate to the calyx- 

 tube. Colorado to Arctic America. 



11. Saxifraga arguta Don, Trans. Linn. Soc. 13: 356. 1822. Nearly gla- 

 brous: scape slender, naked, 3-5 dm. high: leaves all radical, 3-5 cm. broad, 

 reniform-cordate or orbicular, crenate-dentate, with acute teeth; petioles 

 long: panicle open, somewhat glandular, usually many-flowered: petals oval, 

 longer than the ovate-oblong reflexed sepals: filaments often petaloid and 

 abortive. S. punctata. From New Mexico to the far northwest. 



12. Saxifraga rhomboidea Greene, Pitt. 3: 343. 1898. Scape glabrate or 

 pubescent, stout, simple, erect, 1-3 dm. high: leaves rosulate in a depressed 

 radical tuft, rhombic-ovate or oval, 3-6 cm. long (including the short-mar- 

 gined petiole), entire, crenate-dentate, or somewhat repand, glabrous, or often 

 lightly pubescent on the margin: flowers small, white, at first densely capitate, 

 later somewhat branched-thyrsiform: petals spatulate-obovate, often emar- 

 ginate: ovary adnate to base of calyx. S. nivalis. Very common on moist 

 slopes; Colorado, north to Montana. 



13. Saxifraga austrina A. Nels. Resembling the preceding, the scape 

 slenderer, sometimes 2 or more from the short rootstock, often pedunculately 

 branched upward, rather densely glandular-pubescent: inflorescense interrupt- 

 edly capitate or paniculately branched-thyrsiform: sepals obtuse, as long as 

 the adnate base: petals clawed, much exceeding the sepals: carpel-tips becom- 

 ing widely divaricate: seeds numerous, brown, oblong, subacute at both 

 ends. (S. rhomboidea austrina A. Nels. Bot. Gaz. 31: 394. 1901.) Southern 

 Colorado and New Mexico. 



14. Saxifraga saximontana E. Nels. Erythea 7: 168. 1899. Scapes 1 or 2, 

 from a short rootstock, pubescent with short purple-tipped glandular hairs, 

 1-2 dm. high: leaves ovate or rhombic-ovate, 2-4 cm. long: inflorescence a 

 panicle of ascending few-flowered corymbose cymes: petals rotund to oval, 

 short-clawed, nearly twice as long as the ovate-obtuse 3-nerved calyx-lobes, 

 which become reflexed: carpels distinct to the base, somewhat adnate to the 

 calyx below: seeds low-tuberculate. S. virginiensis. Northern Wyoming and 

 northwestward. 



15. Saxifraga subapetala E. Nels. Erythea 7: 169. 1899. Scapes solitary 

 from a thick corm-like caudex, somewhat hirsute and glandular, 2-4 dm. high: 



elliptic to oblanceolate, glabrous or short-pubescent, the margins ciliate, 

 5-10 cm. long: panicle spiciform, the glomerules dense: calyx-tube adnate 

 to the carpels for most of its length, the ovate-obtuse finally reflexed lobes 

 longer than the tube: petals wanting or minute: carpels distinct, adnate to the 

 disk-like base <>f the calyx: seeds wing-margined, short-tuberculate in lines. 

 S. inteyrifolid, in part. Wyoming, northward and westward. 



15a. Saxifraga subapetala normalis A. Nels. Bot. Gaz. 42: 53. 1906. 



