376 ICOSANJJRIA POLYGYNIA. 



ternate ; leaflets ovate-acuminate, somewhat lobed, coarsely serrate, 

 hoary tomentose beneath ; petioles terete ; racemes terminal. 



HAB. Rocky places. May August. Stem long, slender; ra- 

 cemes long ; Jr. black, round. 



R. trivialis : sarmentose procumbent ; petioles and peduncles aculeate- 

 hispid, with the prickles recurved ; stipules subulate ; leaves ternate 

 and quinate oval, acute, unequally serrate ; pedicels solitary, elon- 

 gated. 



HAB. Stony fields. May June. Stems long; leaves subsemperv. ; 

 Jr. large, black. 



R. odoratus : unarmed, erect, viscidly pubescent ; leaves simple, acute, 

 3 5-lobed ; corymbs terminal, divaricate ; calyx appendiculate ; 

 petals nearly round. 



HAB. Rocky places. June. Shrub 3 4 feet high ; Jloicer large, 

 purple ; fr. yellow, large. 



* * Somewhat herbaceous. 



R. saxatilis b. canadensis : herbaceous, pubescent ; stems creeping ; 

 leaves ternate ; leaflets rhombic, acute, incisely dentate, naked ; the 

 terminal one petiolate ; flowers somewhat in threes ; pedicels elon- 



gated. 

 [AB. 



HAB. Mountains. Fruit small, black. 



234. DALIBARDA. 



D. repens : villous ; stolons creeping ; leaves simple, cordate, c,cnate ; 



peduncles 1-flowered. 

 HAB. Woods and mountains. June, 7J. ; scape Jilif. ; Jlower white ; 



pet. ovate. 



235. GEUM. Avens. 



G. strictum: hairy; leaves all interruptedly pinnate; the terminal 

 leaflet larger ; leaflets ovate, dentate; stipules incisi d ; calyx with 5 

 alternate segments, linear and short ; flowers erect ; petals roundish, 

 a little longer than the segments ; awns naked, uncinate. 



HAB. Swamps. Aug. Tj. ; stem simple, 2 feet high ; Jlower large, 

 yellow, dust. 



G. virginianum : pubescent ; radical and lower cauline leaves ternate 

 the upper lanceolate ; stipules ovate, nearly entire ; flowers erect ; 

 petals shorter than the calyx ; awns uncinate, naked, hairy, and 

 twisted at the summit. 



HAB. Woods and thickets. June July, Tj. ; stem 2 feet high ; 

 Jlower pedunc., yell.-white. 



G. ricale : pubescent ; stem simple ; radical leaves interruptedly pin- 

 nate ; cauline ones 3-cleft ; flowers nodding ; petals as long as the 

 calyx ; awns plumose, nearly naked at the summit, minutely uncin- 

 ate. 



HAB. Bogs. j^i ay June. Stem 1J 2 feet high; term. Lcajl. 

 irple. 



