ROSACEJE. (rose FAMILY.) 161 



11. SIBBALDIA, L. 



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

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

 which lines the base of the calyx. Achenes 5-10; styles lateral. — Low 

 and depressed mountain perennials ; included by some in Potentilla. (Dedi- 

 cated to Dr. Robert Sibhuld, professor at Edinburgh at the close of the 17th 

 century.) 



1. S. procumbens, L. Leaflets 3, wedge-shaped, 3-toothed at the apex ; 

 petals yellow. — xVlpine summits of the White Mts., and northward. (Eu.) 



12. ALCHEMILLA, Tourn. Lady's Mantle. 



Calyx-tube inversely conical, contracted at the throat ; limb 4-parted with aa 

 many alternate accessory lobes. Petals none. Stamens 1-4. Pistils 1-4; 

 the slender style arising from near the base ; achenes included in the tube of 

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

 and small corymbed greenish flowers. (From Alkemeli/eh, the Arabic name, 

 having reference to the silky pubescence of some species.) 



A. ARVENSis, Scop. (Parsley Piert.) Small annual (3-8' high), leafy; 

 leaves 3-parted, with the wedge-shaped lobes 2-3-cleft, pubescent; flowers 

 fascicled opposite the axils. — Va. and N. C. (Adv. from Eu.) 



13. A GRIM ONI A, Tourn. Agrimony. 



Calyx-tube top-shaped, contracted at the throat, beset with hooked bristles 

 above, indurated in fruit and enclosing the 2 achenes ; the limb 5-cleft, clo.sed 

 after flowering. Petals 5. Stamens 5 -15 Styles terminal. Seed suspended 

 — Perennial herbs, with interruptedly pinnate leaves, and yellow flowers in 

 slender spiked racemes ; bracts 3-cleft. (Xame a corruption of Argemonia, of 

 the same derivation as Argemone, p. 59.) 



1. A. Eupatoria, L. (Co.mmox Agrimony.) Leaflets b-1 with minute 

 ones intermixed, obJong-ohovate, coarsely toothed ; petals twice the length of the 

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



2. A. parviflora, Ait. (Small-flowered A.) Leaflets crowded, 11- 

 19, icith smaller ones intermixed, lanceolate, acute, deeply and regularly cut- 

 serrate, as well as the stipules ; petals small. — Woods and glades, N. Y. and 

 N. J. to Ga., west to Mich., Kan., and La. 



14. POTERIUM, L. 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. Achene 

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

 tube. Seed suspended. — Chiefly perennial herbs, with unequally pinnate 

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

 oecious flowers crowded in a dense head or spike at the summit of a long and 

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

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

 dicinal drink.) 



