POLYPETALOUS EXOGENOUS PLANTS. 253 



eluded in the grooved and indurated calyx-tube. — Peren- 

 nial herhs, with unequally pinnate leaves, leafy toothed 

 stipules, and small yellow fioiuers in long spiked racemes ; 

 fruit nodding. 



A. EuPATORiA, L. Stem hairy; leaflets 3-7, with smaller 

 ones below or intermixed, oblong-ovate, hairy, sometimes 

 white-downy beneath, coarsely serrate; ^:>e^«Z5 twice the 

 length of the calyx. Stem 2°-3° high. 



A. PARVIFLORA, Ait. Stem and petiole hirsute ; leaflets 

 9-15, with smaller ones between, lanceolate, coarsely ser- 

 rate, roughish above, pubescent beneath ; flowers and fruit 

 smaller than A. Eupatoria. 



SANGUISORBA, L. 



CflZya; 4-parted, the tube 4-angled; petals none; stamens 

 4, the filaments usually thickened upward; style terminal, 

 slender; stigma pencil-form; achenia 1-2, included in 

 the 4-winged indurated calyx-tube. — j^erJ^, with unequally 

 pinnate leaves ; floicers in close heads or spikes. 



S. ANNUA. Glabrous ; stem branching ; leaflets 4-6 pairs, 

 oval, deeply pectinate-pinnatifid ; the segments linear and 

 very narrow ; heads elliptical ; Iracteoles 3, large and scari- 

 ous ; filaments short, not dilated ; floicers all perfect, 

 brownish-green. Stem 10-20 inches high, slender, leafy; 

 annual. — Dr. Leavemuorth. 



GEUM, L. AvENS. 



Calyx campanulate, deeply 5-cleft, and usually with as 

 many bracts as the sinuses ; petals 5 ; stamens and achenia 

 numerous, the latter crowded on the conical or cylindrical 

 dry receptacle ; styles terminal, long, persistent, jointed 

 and hairy, or straight and smoothish ; seeds erect ; flotvers 



