JOHNSON: A REVISION OF THE SECTION BO RAP HI LA 27 



8-14 cm. high, ver>' slender to deHcate, purpUsh, glabrous except for an 

 occasional gland-tipped hair, solitary, erect or assurgent, corymbosely 

 branched above or from the middle into a few-branched, few-tlowered in- 

 florescence, the branches or peduncles very slender to delicate, bearing 1-3 

 flowers ; glabrous. Perennial from a short, slender, fibrous-rooted caudex. 

 A species of very slender to delicate habit, with glabrous scapes which 

 are quite purplish in color. The inflorescence is also very delicate. In the 

 specimens examined the carpels are all very broad at the gland, strongly con- 

 tracted upwards to the beaks, and conspicuously bottle-shaped (Plate VI). 



Distribution. — Known only from the type locality. 

 ' Specimens exam.incd : 



Oregon: Mt. Grayback, June 15, 1904, C. V. Piper, No. 5061 (UMH). Type! 



Saxifraga aequidentata (Small) N. Comb. 



Mkranthes aequidentata Small. N. Am. Fl. 22:2:145. 1905. 



Ovary slightly inferior, the receptacle very shallow and flattened. Fol- 

 licles short to longer, stout, somewhat spreading, occasionally 3 together ; 

 beaks very short, spreading. Stigmas at length elongate, papillate, becoming 

 strongly deflexed-curved. Young carpels erect, broadened at base, with short 

 stout beaks. Gland a dilated collar-like ring at the very base of the carpels. 

 Filaments subulate, 2-3.5 mm. ; anthers purple on the margins. Sepals broad, 

 ovate, oblong-ovate to deltoid, varying considerably, 1.5-2.5 mm., acute to 

 obtuse, free to base or nearly so, pubescent on the back ; lateral nerves 2, of 

 various lengths, often coalescing with midnerve at middle or below apex ; 

 spreading at first, later reflexed. Petals large, 3-4 mm., white, broadly ovate 

 to elliptic-oblong or obovate, scarcely clawedat the base; branches of the mid- 

 nerve 2, simple or variously branched, sometimes coalescing with midnerve 

 at or below apex. Hairs short, the glands elongate oblong to ovovoid, or glo- 

 bose, multicellular, the former consisting of a row of rounded cells. Seeds 

 fusiform, with longitudinal ridges of low moniliform or scarcely tuberculate 

 cells of "teeth." Leaves basal, short, 7 cm. and less, ovate to elliptic, some- 

 times triangular-ovate or deltoid, rounded at apex, unifornaly and rather 

 finely crenate-dentate, copiously brownish pubescent to tomentose beneath, 

 contracted into somewhat elongate, flattened, petiole-like bases, commonly 

 longer than the blades ; leaves usually crowded among the remains of the 

 earlier leaves. Scapes erect or assurgent, 20 cm. tall and less, siiigle or 

 several together, scantily glandular-pubescent, branching at the top into a 

 widely spreading corymbose many-flowered inflorescence with open cymules 

 and the branches arising from small linear-oblong or lanceolate bracts, 

 copiously pubescent on the back, the upper much reduced. Perennial from 

 a short stout fibrous-rooted caudex. 



