ROSACE.K. (koSK FAMrLV.) 161 



11. SIBBALDIA, L. 



Calyx flattish, 5-cleft, with 5 luattlets. rcLals '), linear-ohluug, iniuutc. Sta- 

 iiieus 5, inserted alternate with the petals into the margin of the w<m»11v disk 

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

 and depressed mountain perennials; included l»y some in Potentilla. (Dedi- 

 cated to Dr. Robert Sihbald, jjrofessor at Edinburgh at the clu.se of the 17th 

 century.) 



1. S. prociimbens, L. Leaflets 3, wedge-shaped, .3-tootheil at the apex ; 

 petals yellow. — Alpine summits of the White Mts., and northward. (Ku.) 



12. ALCHEMILLA, Tourn. Lai>v's Mantle. 



Calyx-tube inversely conical, contracted at the throat; limb 4-i»!u-ted with aa 

 manv alternate accessory li>bes. IVtals none. Stamens 1-4. I'istils 1-4, 

 the slender style ari.sing from near the ba.so ; achenes included in the tube of 

 the persistent calyx. — Low herbs, with ])alniately lobed or compound leaves, 

 and small corymbed greenish Howers. (From AILeiiifli/eh, the Arabic name, 

 having reference to the silky jnibescence of some species.) 



A. ARVKNSis, Scop. (Parslky Pip^rr.) Small annual (.3-8' high), leafy; 

 leaves 3-parted, with the wedge-sliaped lobes 2-3-cleft, ])ubescent ; flowers 

 fascicled opposite the axils. — V'a. and N. C. (Adv. from Ku.) 



13. A GRIM ONI A, Tourn. Aguimony. 



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, closed 

 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. (Name a corruption of Ar<jeiuonia, of 

 the same derivation as Argemone, p. 59.) 



1. A. Eupatoria, L. (Common Agrimony.) Leaflets b -1 icith mhinte 

 ones intermixed, o/>/om/-oborate, coarsely toothed; petals twice the length of the 

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



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

 19, u-ith 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. Blrnet. 



Calyx with a top-shaped tulte, constricted at tlie throat, ]»ersistent ; the 4 

 broad petal-like spreading lol)es 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 tip]»ed with a tufted or bru.sh-like stigma. Achene 

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

 tube. Seed suspended. — Chiefly perennial herbs, with unc«iually j)innate 

 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 iror-ffpiop, a drinking- 

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

 dicinal drink.) 



