150 ROSACEA. (ROSE family.) 



on a long naked peduncle. — Meadows and Prairies, Perm, to Michigan, Illi- 

 nois, and Kentucky. June. — Flowers deep peach-blossom color, handsome, 

 the petals and sepals often in fours ! The bruised foliage exhales the odor of 

 Sweet Birch. 



§ 4. ARIJNCUS, Seringe. Perennial herbs, with dioecious whitish flowers, in 

 many slender spikts disposed in a long compound panicle: leaves thrice-pinnate : 

 stipules obsolete: pods 3-5, several-setdtd : ptdicels reflexed in fruit. 

 6. S. Ariincus, L. (Goat's-Beard.) Smooth, tall; leaflets thin, lance- 

 olate-oblong, or the terminal ones ovate-lanceolate, taper-pointed, sharply cu 1 

 and serrate. — Rich woods, Catskill and Alleghany Mountains and westward. 

 Near Baltimore, P. V. Leroy. June. (Eu.) 



3. 6ILLENIA, Mcench. Indian Physic. 



Calyx narrow, somewhat constricted at the throat, 5-toothed ; teeth erect. 

 Petals 5, rather unequal, linear-lanceolate, inserted in the throat of the calyx ; 

 convolute in the bud. Stamens 10 - 20, included. Pods 5, included, at first 

 lightly cohering with each other, 2-4-seeded. Seeds ascending, with a close 

 coriaceous coat, and some albuman. — Perennial herbs, with almost sessile 3-fo- 

 liolate leaves; the thin leaflets doubly serrate and incised. Flowers loosely 

 paniculate-corymbed, pale rose-color or white. (Dedicated to an obscure Ger- 

 man botanist or physician, A. Gille, or Gillenius.) 



1. G. trifoliata, Mcench. (Bowman's Root.) Leaflets ovate-oblong, 

 pointed, cut-serrate ; stipules small, awl-shaped, entire. — Rich woods, from W. 

 New York southward, and sparingly in the Western States. July. 



2. G. Stipulaeea, Watt. (American Ipecac.) Leaflets lanceolate, 

 deeply incised ; stipules large and leaf-like, doubly incised. — From W. Penn- 

 sylvania and New York to Illinois and Kentucky. June. 



4. POTEEIUM, L. (including Sanguisorba.) Burnet. 



Calyx with a top-shaped tube, constricted at the throat, persistent; the 4 

 broad petal-like spreading lobes imbricated in the bud, deciduous. Petals none. 

 Stamens 4-12 or more, with flaccid filaments and short anthers. Pistils 1 -3 : 

 the slender terminal style tipped with a tufted or brush-like stigma. Achenium 

 (commonly solitary) enclosed in the 4-angled dry and thickish closed calyx- 

 tabe. Seed suspended. — Chiefly perennial herbs, Avith unequally pinnate 

 haves, stipules coherent with the petiole, and small, often polygamous or di- 

 cxicious flowers crowded in a dense head or spike at the summit of a long a/id 

 naked peduncle, each bracteate and 2-bracteolate. (Name Trorrjptov, a drinking- 

 cup, the foliage of Burnet having been used in the preparation of some medici- 

 nal drink.) 



1. P. Canadense. (Canadian Burnet.) Stamens 4, long-exserted. 

 club-shaped, white, as is the whole of the elongated and cylindrical spike ; stem 

 3° - 6° high, leaflets numerous, ovate or oblong-lanceolate, coarsely serrate, ob- 

 tuse, heart-shaped at the base, as if stipellate ; stipules serrate. ( Sanguisorba 

 Canadensis, L., and former edition.) — Bogs and wet meadows; chiefly north- 

 ward. Au£. - Oct. 



