5 SAXIFRAGACEAE. Vol. II. 



7. Micranthes Geum (L.) Small. Kidney-leaved Saxifrage. Fig. 2162. 



Saxifraga Geum L. Sp. PI. 401. 1753. 



M. Geum Small, N. A. Flora 22^ ; 148. 1905. 



Densely glandular-pubescent, scapose, 

 scape erect, 3'-io' high. Leaves all 

 clustered at the base, cordate, kidney- 

 shaped or orbicular, 4'-i' wide, coarsely 

 crenate all around, borne on stout 

 densely pubescent petioles l'-2j' long; 

 inflorescence terminal, paniculate; bracts 

 small, linear, obtuse; branches of the 

 panicle ascending, 2-6-flowered ; flowers 

 2"-3" broad ; petals white, oblong or 

 ovate-oblong, with a yellow spot at the 

 base and several smaller purplish spots 

 at the middle ; calyx-lobes lanceolate or 

 ovate-lanceolate, reflexed; capsule ob- 

 long, its beaks slightly divergent. 



Newfoundland and in the mountainous 

 parts of Europe. June-July. 



5. HYDATICA Neck.; S. F. Gray, Nat. Air. Brit. PI. 2: 530. 1821. 



Spatularia Haw. Saxifr. Enum. 47. 1821. Not Pers. 1791. 



Perennial herbs, with leafy caudices and solitary or tufted scapes and basal usually 

 spatulate toothed leaves, the flowers in open panicled cymes, their parts sometimes changed 

 into bulblets. Calyx-lobes S, reflexed. Corolla white or mainly so, irregular, the petals all 

 clawed, the 3 upper with ovate, lanceolate or sagittate blades, the 2 lower ones with elliptic 

 or spatulate blades, or in plants that bear terminal flowers, the lower petals somewhat simu- 

 late the upper ones. Stamens 10; filaments subulate. Ovary chiefly superior, the carpels 

 united at the base or to below the middle. Follicles erect, except the ascending or diverging 

 tips. [Greek, referring to the turgid follicles,] 



About 12 species, natives of the north temperate and boreal parts of both hemispheres. Type 

 species: Saxifraga leucanthemifolia Michx. 



Inflorescence with bulblets. i. H. foUolosa. 

 Inflorescence without bulblets. 



Primary bracts of the inflorescence not leaf -like ; petals stout-clawed. 2. H. slellaris. 



Primary bracts of the inflorescence leaf-like : petals slender-clawed. 3. H. petiolaris. 



I. Hydatica foliolosa (R. Br.) Small. Foliose Saxifrage. 

 Fig. 2163. 



Saxifraga stellaris var. comosa Poir. in Lam. Encycl. 6: 680. 1804. 

 Saxifraga foliolosa R. Br. in Parry's Voy. 275. 1824. 

 Saxifraga comosa Britton, Mem. Torr. Club 5: 178. 1894. 



Scape slender, slightly viscid, 2'-6' high. Leaves oblanceolate, 

 cuneate at the base, dentate and mostly obtuse at the apex, 4"-9" 

 long; flowers few, white, regular, many or sometimes all of them 

 replaced by little tuftes of leaves ; calyx nearly free from the ovary, 

 its lobes reflexed, much shorter than the sagittate obtusish petals 

 which are narrowed into a claw, or sometimes cordate at the base. 



In rocky places, Mt. Katahdin, Maine ; Labrador and arctic America. 

 Also in northeastern Asia and northern Europe. Summer. 



