365 
Mr. T. H. Kearney, who erroneously referred it to Saxifraga 
Grayana, a member of the subgenus Hydactia. The species really 
belongs to the subgenus Micranthes and is a close relative of the 
common Saxifraga Virginiensis. The primary character to debar 
it from relationship with S. Grayana is its subulate filaments; the 
calyx-segments, petals and follicles are also different from those of 
that species. The pubescence in S. Zennesseensis is inclined to be 
tomentose and tawny and is much more abundant than in S. Vir- 
Simiensis. 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 
€xcellent species, differing from the related Saxifraga integrifolia 
by its leaves, which closely resemble those of a broad-leaved C/ay- 
Yonia, 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. . 
