ROSACES. (ROSE FAMILY.) 115 



1. A. Ellpatdria, L. (COMMON AGRIMONY.) Leaflets 5-7 with mi- 

 nute ones intermixed, oblong-obovate, coarsely toothed ; petals twice the length of 

 the calyx. Borders of woods, common. July -Sept. (Eu.) 



2. A. parvifldra, Ait. Lea/lets crowded, 11-19, with smaller ones inter- 

 mixed, lanceolate, acute, deeply and regularly cut-serrate, as well as the stipules ; 

 petals small. Woods and glades, Pennsylvania and southwestward. July. 



5. SANOU1SORBA, L. GREAT BDRNET. 



Calyx colored, 3-bracted, the tube 4-angled, constricted ; the lobes 4, spread- 

 ing. Petals none. Stamens 4 ; the filaments usually enlarging upwards. Pis- 

 tils 1 or rarely 2 : style slender, terminal : stigma pencil-form, tufted. Achenium 

 included in the indurated 4-wingcd calyx-tube. Seed suspended. Herbs, with 

 unequally pinnate leaves, and small flowers, sometimes polygamous, in close 

 spikes or heads. (Name from sanguis, blood, and sorbeo, to absorb ; the plants 

 having been esteemed as vulneraries.) 



1. S. Canadcnsis, L. (CANADIAN BDRNET.) Stamens much longer 

 than the calyx ; spikes cylindrical and elongated in fruit ; leaflets numerous, 

 ovate or oblong-lanceolate, serrate, obtuse, heart-shaped at the base, stipe Hate ; 

 stipules serrate. Ij. Bogs and wet meadows ; chiefly northward. Aug. -OcL 

 A tall herb : flowers wliite, sometimes purple. 



POTERIUM SANGUISORBA, the COMMON BURNET of the gardens, has mo- 

 noecious polyandrous flowers. 



6. ALCIIERliLLA, Tourn. LADY'S MANTLE. 



Calyx-tube inversely conical, contracted at the top ; limb 4-parted, with as 

 many alternate bractlets. Petals none. Stamens 1-4. Pistils 1 - 4 ; the slen- 

 der style arising from near the base of the ovary ; the achenia included in the 

 persistent calyx. Low herbs, with palmately lobed or compound leaves, and 

 small corymbed greenish flowers. (From Alkemelych, the Arabic name.) 



1. A. ARVENSIS, L. (PARSLEY PIERT.) Stems (3' -8' high) leafy ; leaves 

 3-parted, with the wedge-shaped lobes 2 - 3-clcft, pubescent ; flowers sessile in the 

 axils, (j) Eastern Virginia. (Adv. from Eu.) 



A. ALPINA, L., is said by Pursh to grow on the Green and White Mountains, 

 New England : but there is most probably some mistake about it. 



7. SIBBA&.DIA, L. SIBBALDIA. 



Calyx flattish, 5-cleft, with 5 bractlets. Petals 5, linear-oblong, minute. Sta- 

 mens 5, inserted alternate with the petals into the margin of the woolly disk 

 which lines the base of the calyx. Achenia 5-10; styles lateral. Low arid 

 depressed mountain perennials. (Dedicated to Dr. Silbald, Prof, at Edinburgh 

 at the close of the 17th century.) 



1. S. procumbeiis, L. Leaflets 3, wedge-shaped, 3-toothed at the 

 apex; petals yellow. Alpine summits of the White Mountains of New Hamp- 

 shire, and northward. (Eu.) 



