444 ROSACEA. POTENTILLA. 



27. p. Durandii : hirsute-pubescent ; stems procumbent, sarmentose ; 

 leaves 3-foUolate ; leaflets roundish, incisely crenate-toothed, hirsute with 

 appressed liairs, especially beneath ; stipules ovate, entire ; pedicels axillary, 

 solitary, elongated, petals obovate, rather longer than ovate acute or acu- 

 minate calyx-segments ; bracteolar segments larger and foliaceous, 2-4- 

 toothed or incised ; achenia 



Georgia, Mr. Durancl ! — Leaflets about half an inch in length and 

 breadth, obtuse and entire at the base, incisely crenate with 11-13 approxi- 

 mate equal teeth, with scattered short appressed hairs, particularly on the 

 veins. Flowers large. Ovaries glabrous : style filiform, elongated. Fruit 

 not seen. — The bracteoles, which are large and toothed like tlie leaflets, are 

 perhaps in an abnormal state in our single specimen ; but the plant is quite 

 different from any species with which we are acquainted. 



28. P. nemoralis (Nestl.) : petals, calyx-segments, and bracteoles usually 

 4 ; stems filiform, procumbent ; leaves palniately 3-foliolate, the lowest 

 mostly 5-foliolate ; the cauline ones petioled ; leaflets obovate-cuneiform, 

 incisely toothed towards the apex ; stipules entire or toothed ; flowers solitary 

 on long axillary pedicels ; petals obcordate, longer than the calyx ; achenia 

 siriate-rugose.— iVesiZ. Pot. p. 65 ; Lehm. ! Pot. jj. 147, t. 13. P. Tor- 

 mentilla, var. nemoralis, Seringe ! in DC. inodr. 2. p. 574. Tormentilla 

 reptans, Linn. ; Engl. hot. t. 864. 



Labrador ! (v. sp. in herb. Hook.) 



29. P. opaca (Linn.) : stems decumbent, filiform ; lower leaves palmate- 

 ly 5-7-foliolate ; leaflets narrowly cuneiform ; very deeply serrate, pilose on 

 both sides ; petals obcordate, equalling the calyx. Lehm. — Jacq. ic. rar. t. 

 91 ; Pursh, Jl. 1. p. 355; Lehm. Pot. p. 105. 



Labrador ex Pursh. May-June. — Flowers small. 



§ 2. Style inserted below the middle of the ovary: seed ascending, a^nphi- 

 tropous or nearly orthotrofous. 



* Style inserted scarcely below the middle of the ovary, filiform ; seed amphitro. 

 pons : carpels glabrous, very villous at the insertion (receptacle very villous : 

 ste7ns creeping and proliferous : pedicels solitary, very long, l-floivered). — 

 Anserina. 



30. P. Anserina (Linn.) : creeping ; ascending stem none ; stolons slen- 

 der, rooting and proliferous ; leaves pinnate ; leaflets 9-19, with several 

 minute pairs interposed, oblong, sharply pinnatifid-serrate, nearly glabrous 

 above, silvery-canescent beneath ; stipules multifid ; pedicels scape-like, 

 solitary, as lonff as the leaves. — Linn..' spec. 1. p. 495; Michx. ! I.e.; 

 Lehm. ! Pot. p. 71 ; BC. ! I. c. ; Hook. ! ft. Bor.-Am. 1. p. 189. 



fi. grandis : leaves very large (12-20 inches long), 21-31 -foliolate. 



y. Granlandica (Hook.) : very small and slender, neai'ly glabrous ; leaf- 

 lets oval or obovate, 5-7, silvery beneath, often reddish above. — Hook. ! in 

 Parrfs 3d voy. apijyx. p. 12b. 



6. Egedii : very small ; leaflets glabrous and greenish on both sides ; 

 stipules entire; pedicels longer than the leaves. — P. Egedii, Wormsk. fl. 

 Dan. 9. t. 1578 ; Le/im. .' I. c. 



Banks of streams, &c., Pennsylvania ! and New England States ! to 

 Arctic America ! west to Oregon ! and California ! 13. Oregon, Dr. Scouler f 

 y. Greenland, and Whale-Fish Islands ! Sandy borders of brackish ponds, 

 Massachusetts, Dr. Pickering ! Mr. Oakes ! <5. Greenland ! June-Sept. — 

 Flowers large. Widely dispersed throughout the colder portion of the whole 



