NATURAL ORDER ROSACEA. 
Tribe—Dnryavex. Section of genus Potentilla, having woody stems. 
Puate X.—Potentilla saxifraga. Ardoino in his Catalogue des Plantes 
Vasculaires de Menton. Lehman. Not given by Woods. 
GeveEric.—Style lateral or nearly terminal. Fruit composed of many 
nuts on a flattish, dry receptacle. Seed pendulous orascending. Stamens 
numerous. Petals 4 to 5. Calyx concave, 10-parted, in two series, 
five exterior parts smaller. Babington’s Manual. 
Spreciric.—Wuts concealed in their silky hairs. Receptacle densely 
hairy. Stamens smooth. Petals white, subrotund, longer than calyx. 
Segments of Calyx acuminate, ciliate with glandular hairs. Pedunele 
bearing many flowers, in a corymbose inflorescence, which springs from 
the axils of trifoliate floral leaves. eaves ternate or quinate ; the 
leaflets being elliptic-lanceolate toothed or entire, coriaceous, glabrous 
above and silky beneath, margins revolute, not ciliate. Stipules acuminate, 
united to petiole throughout the greater part of their length. Stem very 
short, woody ; its branches concealed in the dead matted stipules, and 
beneath the dense covering of the imbricate living ones. Growth woody, 
forming dense tufts, resembling those of Dryas octopetala ; and though 
not herbaceous, has not the habit of a shrub. 
EXPLANATION OF PiaTE- X.—This plate represents Potentilla Saxi- 
fraga, and is, I believe, the first coloured drawing of this rare and 
lately discovered plant that has been published. Fig. 1, the immature 
nut, taken from the flower with the style. Fig. 2, the flower with the 
petals removed. Fig. 3, a stamen showing the anther previous to the 
emission of pollen. 
Remarks.—Potentilla Saxifraga was discovered by M. Ardoino, and 
in his “ Catalogue” we find the following account of its habitats :—“I 
found this beautiful species in 1847, upon the precipitous rocks between 
St. Agnes and Castillon, at 870 métres (equal to about 3,480 feet) ; it 
has been since re-discovered at Peglia, Duranus, Raus, and other points of 
the Alpes Maritimes.” The plant has, within the last year or two, 
been discovered on other mountains near Mentone, and in the celebrated 
Gorge de Saorge, on the road from Nice to Turin. On heights near the 
shore it chooses northern exposures, not tolerating the heat of the direct 
