62 Introduction to Botany. 



2^ feel high. Basal leaves s-foliate or pinnately divided, the terminal lobe larger 

 and broadly ovate. Stem leaves 3-5-lobed or divided, nearly or quite sessile. 

 Receptacle densely bristly, and styles glabrous, or pubescent below. In shady 

 places. 



4. Geum Virginianum, L. Rough Avens, Resembling the preceding species, 

 but stouter ind bristly pubescent. Flowers creamy white. Receptacle glabrous or 

 merely downy. Low grounds and borders of woods. 



5. Geum macrophyllum, Willd. {Gr., ?nakros, large; phyllon, leaf.) LARGE- 

 LEAVED Avens. Flowers yellow. Basal leaves lyrate-pinnate, the terminal lobe 

 much exceeding the others. Lateral lobes 3-6, with smaller lobes interspersed. 

 Upper leaves of 2-4 leaflets. Receptacle glabrous; style slender and jointed, 

 pubescent below. Stems erect and bristly-pubescent. 



IX. ROSA. Rose. 



(L., rosa, rose,) 



Erect or climbing, generally prickly, shrubs. Flowers showy, red, 

 pink, or white, rarely yellow. Lobes of the calyx usually 5 ; petals 5 ; 

 stamens many, all borne around the margin of an urn-shaped receptacle, 

 in which are inclosed numerous carpels, arising from the base. Fruit 

 berrylike, consisting of the thickened, hollow receptacle and inclosed 

 carpels. 



I. Rosa setigera, Michx. (L., seta, bristle; gerere, to bear.) Climbing or 

 Prairie Rose. Stems climbing, becoming several feet long, beset with stout, 

 scattered prickles. Leaflets commonly 3, sometimes 5. Stipules very narrow. 

 Styles cohering in a column. Fruit globular and somewhat glandular. Prairies 

 and thickets. 



z. Rosa blanda, Ait. (L., blandus, of a smooth tongue, agreeable.) SMOOTH 

 or Meadow Rose. Erect, 2 to 4 feet tall, almost destitute of prickles. Leaflets 

 5-7; stipules rather broad. Styles separate, fruit globose or pyriform, nearly or 

 quite glabrous, tipped by the persistent, long, erect, or spreading sepals. In moist 

 and rocky places. 



3. Rosa Arkansana, Porter. Arkansas Rose. Erect, t to 2 feet high, the 

 stems beset with slender bristles. Leaflets 7-11. Lanceolate sepals persistent, 

 spreading, or reflexed. Fruit globose and glabrous. Prairies. 



4. Rosa Woodsii, Lindl. (Latin genitive of proper name.) Woods' Rose. 

 I to 3 feet high. Straight spines on the stems, at least below. Leaflets 5-9. 

 Acuminate, lanceolate sepals erect on the globose fruit. Usually with spines just 

 below the stipules. Prairies. 



5. Rosa hiimilis, Marsh. (L., ^mw/A'j, low.) Low or Pasture ROSE. From 

 J to 6 feet high, bushy. Leaflets mostly 5, sometimes 7 ; straight spines below the 

 stipules. Flowers solitary or few together. Sepals deciduous, spreading, com- 

 monly lobed. In dry and rocky soil. 



