365 



Mr. T. H. Kearney, who erroneously referred it to Saxifraga 

 Qrayana, a member of the subgenus Hydactia. The species really 

 belongs to the subgenus MicrantJies and is a close relative of the 

 common Saxifraga Virginiensis . The primary character to debar 

 it from relationship with vS. Grayana is its subulate filaments ; the 

 calyx- segments, petals and follicles are also different from those of 

 that species. The pubescence in vS. Tcnnesseensis is inclined to be 

 tomentose and tawny and is much more abundant than in ^. Vir- 

 giniensis. Besides its general habit, it can be readily distinguished 

 by its lanceolate petals, which are notched at the apex and strongly 

 marked with two yellow spots near the base, 



Saxifraga claytoniaefolia Canby n. sp. 



Perennial by a short horizontal rootstock, slender, glandular- 

 pilose above, glabrate below. Leaves fleshy, orbicular-elliptic^ 

 more or less oblique, 6-10 cm. long, glabrate, obtuse, entire, undu- 

 late, palmately six-eight-nerved, narrowed into a winged ribbed 

 petiole which is as long as the blade or longer; scape erect or 

 assurgent, 2-3 dm. tall, glabrate near the base, branched above; 

 infloresence thyrsoid-corymbose, its branches subtended by small 

 linear or linear-oblong bracts ; flowers white, 4 mm. broad, each 

 subtended by a small bractlet ; calyx flattish, 2 mm. high, its seg- 

 ments spreading and recurved, thin, oblong, acute, 3-nerved, 

 longer than the tube ; petals spatulate or obovate-spatulate, 2 mm, 

 long, slightly emarginate or minutely apiculate, gradually narrowed 

 into a claw, marked with a stout midnerve which gives off two 

 lateral nerves about the middle ; filaments subulate, shorter than 

 the petals, incurved at the summit; follicles (each) ovoid, 3 mm. 

 long, the short stout styles spreading at an angle of 120° or more; 

 seeds irregularly oblong, .7 mm. long, reddish, smooth, or very 

 faintly striate. 



Damp crevices of rocks. The Dalles, Oregon. Collected by 

 Frank Tweedy, May, 1883. 



I have taken up a specific name attached to a specimen, by 

 Mr. Canby, preserved in the Canby Herbarium, now at the Col- 

 lege of Pharmacy, New York, The form is without doubt an 

 excellent species, differing from the related Saxifraga integrifolia 

 by its leaves, which closely resemble those of a broad-leaved Clay- 

 tonia, its flat calyx-tube, its oblong calyx -segments and its spatu- 

 late or obovate-spatulate petals, which are only 3-nerved and either 

 notched or apiculate at the apex. 



