220 



ROSACEAE. [VOL. II. 



4. Geum vernum (Raf.) T. & G. Spring 

 Avens. (Fig. 1943.) 



Stylipus vernus Raf. Neog. 3. 1825. 



de-urn vernum T. & G. Fl. N. A. i: 422. 1840. 



Erect or ascending, slender, pubescent with spread- 

 ing hairs, or glabrate, simple or nearly so, 6 / -2 high. 

 Basal leaves tufted, petioled, with a single orbicular- 

 reniform dentate 3-5-lobed leaflet, or pinnate with 3-7 

 obovate or oval more or less dentate and lobed ones; 

 stem-leaves few, sessile or short-petioled, pinnate or 

 pinnatiful; flowers few, terminal, corymbose or race- 

 mose, erect, yellow, about 2" broad; calyx-lobes ovate, 

 acute, reflexed; bractlets none; petals spreading; head 

 of fruit stalked; style glabrous, jointed, about 2"" 

 long; receptacle glabrous. 



Shaded places, Ontario to West Virginia and Tennessee, 

 west to Illinois and Texas. Naturalized from the West in 

 New Jersey and southern New York. April June. 



5. Geum Canadense Jacq. 



Geum Canadense Jacq. Hort. Vind. 2: 82. pi. 175. 



1772. 



tlrntn Carolinianum Walt. Fl. Car. 150. 1788. 

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



Softly and finely pubescent or glabrate, erect, 

 branched above, i#-2> 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, 

 3~5-lobed or divided; peduncles slender; flowers 

 white, 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 Georgia, west 

 to Minnesota and Missouri. June - AUK. 



White Avens. (Fig. 1944.) 



6. Geum Virginianum L,. 

 (Fig. 1945.) 



Rough Avens. 



Geum Virginianum L,. Sp. PI. 500. 1753. 



Resembling the preceeding species but much stouter, 

 the stem and petioles bristly-pubescent, the stout 

 short peduncles pubescent with reflexed hairs. Sepals 

 reflexed, exceeding the spreading revolute creamy- 

 white petals; head of fruit globose, very dense, 6 // -8 // 

 in diameter; receptacle merely downy or glabrous; style 

 slender, jointed, pubescent below, 4' '-5" long. 



Low ground, New Brunswick to Pennsylvania and south- 

 ward in the Alleghanies, west through Ontario to Minne- 

 sota and to Missouri. Blooms somewhat earlier than (r. 

 Canadense. Basal leaves becoming very large, the terminal 

 leaflet sometimes 6' wide. May-July, 



