ROSACEAE. 



Vol. II. 



I. Geum virginianum I.. Rough Avens. Ben- 

 iK-t. Jlcrb-beniiet. l'"ig. 2275. 



Geum vii'giniaiium L. Sp. PI. 500. 1753. 



Branched above, ratlier .stout, 2\ high or Ies.s. Stem 

 and petioles bristly-pubescent, the stout short peduncles 

 pubescent with rellcxed hairs ; basal and lower leaves 

 odd-pinnate, the terminal leaflet usually larger than the 

 lateral ones, the lower leaflets mostly very small ; upper 

 leaves 3-parted, 3-clcft, or tlie uppermost merely in- 

 cised; stipules small; calyx-lobes reflexed, exceeding 

 or about equalling the creamy-white petals; head of 

 fruit globose, very dense, 6"-8" in diameter; receptacle 

 merely downy or glabrous; style slender, jointed, pu- 

 bescent below, 4"-5" long. 



Low ground. Nova Scotia to Pennsylvania and south- 

 ward in the Alleghanies, west through Ontario to Minne- 

 sota and to Missouri. Blooms somewhat earlier than C. 

 cauadcvse. Basal leaves liecoming very large, the terminal 

 leaflet sometimes 6' wide. White avens. Throat-root. 

 Chocolate-root. May-July. 



2. Geum canadense Jacq. White Avens. 

 Fig. 22y6. 



Gcuni carotinianum Walt. Fl. Car. 150. 1788. 

 Geum album Gmel. Syst. 2: 861. 1791. 



Softly and finely pubescent or glabrate, erect, 

 branched above, i4-2i high. Stipules small, 

 dentate; basal leaves petioled, lobed, 3-foliolate 

 or pinnately divided, their segments 3-5, the 

 terminal one broadly ovate or obovate, the lateral 

 ones narrower, all dentate and more or less 

 lobed, sometimes with smaller ones borne on the 

 petiole; stem-leaves short-petioled or sessile, 

 3-S-lobed or divided; peduncles slender; flowers 

 wdiite, 4"-8" broad ; calyx-lobes lanceolate, re- 

 flexed; petals obovate, equalling or shorter than 

 the sepals; head of fruit globose-obovoid, sessile, 

 4"-6" long; receptacle densely short-bristly; style 

 glabrous, or pubescent below, jointed, 3"-4" long. 



In shaded places, Nova Scotia to Ontario, Georgia, 

 Minnesota, South Dakota, Louisiana and Kansas. 

 Red-root. Herb-bennet. June-Aug. 



Geum 



is escaped 



3. Geum flavum (Porter) Bickncll. Crearn- 

 colored Avens. Fig. 2277. 



Geum album var. flavum Porter, Bull. Torr. Club 16: 



21. 18S9. 

 Geum canadense var. flavum Britton, Bull. Torr. 



Club 18 : 270. iSgi. 

 G. flavum Bicknell, Bull. Torr. Club 23: 523. 1896. 



Stem bristly-hairy below, erect, ii-3'' tall. 

 Stipules large, often l' long, foliaceous, dentate 

 or lobed. Basal leaves mostly pinnately divided, 

 sometimes only lobed ; lower stem-leaves usually 

 also pinnately divided, the terminal segment 

 often elongated; upper stem-leaves oval or lan- 

 ceolate, sometimes entire; peduncles slender; 

 flowers cream-yellow, about 3" broad ; petals nar- 

 rowly oblong, shorter than or little exceeding the 

 reflexed calyx-lobes ; head of fruit sessile, about 

 5" in diameter; receptacle bristly-villons; style 

 nearly glabrous to the base, jointed, 3"-4" long. 



In woods, Connecticut to North Carolina, Ohio, 

 western Kentucky and Tennessee. June-.-\ug. 



from Europe, distinguished by its bright yellow, broader and longer petals. 



urbanum L. 



from cultivation at Cambridge, Mass 



