Fig. 484: Penthorum sedoides: seed, x 100. (Courtesy of R. K. Godfrey). 



leaves 2 to 5, linear to narrowly oblong, 3-7 mm. long, glabrous to sparsely 

 glandular-pubescent; flowers solitary or paired; calyx lobes ovate to ovate-oblong, 

 sharply reflexed, 2-3 mm. long, the free hypanthium scarcely 0.5 mm. long; petals 

 yellow, finely cross-rugulose with orange below the middle, deciduous, broadly 

 obovate to ovate, 5-7 mm. long, 5- to 9-nerved, clawed; filaments slender; capsule 

 ovoid, 6-8 mm. long; seeds brown, about 1 mm. long, narrowly oblong-fusiform, 

 lightly wrinkled. Leptasea chrysantha (Gray) Small. 



On open rocky-grassy slopes and moraines on higher mts., commonly near snow- 

 banks in seepage, in N. M. (Colfax, Rio Arriba and Mora cos.); Wyo. and Ut., 

 s. toN.M. 



3. Saxifraga debUis Engelm. ex Gray. Pigmy saxifrage. 



Tufted perennial forming small patches to 8 cm. across, glabrous to glandular- 

 pubescent and often pilose (especially on the bases of lower leaves); flowering 

 stems several, leafy, to 1 dm. tall; leaves mostly basal, often bulbiferous, the petioles 

 slender, often brownish-pilose, stipular; blades more or less reniform, 5-15 mm. 

 wide, coarsely and shallowly 3- to 7-lobed; cauline leaves usually 1 to several, 

 similar to basal leaves or entire; flowers 1 to 3; calyx turbinate-campanulate, 

 usually purplish, 2.5-3.5 mm. long, the erect lobes ovate to ovate-oblong and 

 rounded; petals deciduous, white and usually somewhat pinkish-veined, narrowly 

 oblong to cuneate-oblong, 2 to 3 times as long as calyx lobes, scarcely clawed at 

 rounded base; stamens equaling calyx lobes, the filaments not clavate; capsule 

 4-6 mm. long; seeds about 0.5 mm. long, brownish, ellipsoidal. 



In wet locations, mostly on cliffs, in rock crevices and on talus below snowbanks 

 on San Francisco Peaks, Coconino Co., Ariz., July-Aug.; Mont, to Colo., Ariz, 

 and Calif. 



4. Saxifraga arguta D. Don. Brook saxifrage. Fig. 485. 



Acaulescent perennial with a long horizontal rootstock; leaf blades orbicular to 

 reniform, cordate, 2-8 cm. wide, the margins coarsely and deeply crenate-dentate; 

 glabrous or ciliate, the petioles 4-12 (-20) cm. long; flowering stems 1.5-5 dm. 

 tall, terminating in an open paniculately cymose inflorescence; sepals ovate-oblong 

 to oblong-lanceolate, 1.5-2 mm. long, often purple, sharply recurved; petals sub- 

 orbicular, abruptly and shortly clawed, about twice as long as the sepals; filaments 



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