426 ROSACEAE 



Petals slightly if at all exceeding the sepals, 5-7 mm. long. 



Bractlets linear-lanceolate, about two-thirds as long as the lanceolate 

 sepals; leaflets obovate, irregularly or doubly toothed. 



„ ,- ^ , , X., , , ®' ^' Olandulosa. 



Bractlets oblong or oblong-lanceolate; sepals ovate-lanceolate; leaflets 

 more evenly simple-toothed, the lateral ones inclined to be orbicu- 



10 T) dTizoTiicQ. 



Leaflets incised, with lanceolate teeth. 11 " D incisa 



Sepals oval or broadly ovate, rarely lanceolate, rounded and mucronate at the apex. 

 Petals 7-8 mm. long, a.scendmg in anthesis; leaves densely hairy; plant stout. 



Petals less than 6 mm. long, spreadmg or reflexed in anthesis. 



Petals 4-6 mm. long; calyx and hj^anthium in fruit together 10-12 mm. long; 

 petioles conspicuously long-hairy; petals yellow. 12. D. oregana. 



13. D. alUda. 



petioles mostly short-hairy; petals whitish. 

 Petals obovate; sepals twice as long as broad. i6 u 



Petals orbicular or nearly so; sepals half longer than broad. 



^*''peSis''Sfich'" ^^ol^Zr- .T'"'' *^?" !^S^ ^^ lo'i^ ^^ the ovary; plant^boutl'dm.' high ; 

 petals much exceeding the sepals; leaflets rhombic-obovate. 15. D. rhomboidea. 



1. D. agrimonioides (Pursh) Rydb. Stem stout and erect, 3-10 dm. 

 S'f '''^''1^,' g^/i«^^^lj>' densely glandular- or viscid-hirsute; basal leaves many; 

 TIT, 1 ' fu ''"?l^ veined, densely pubescent on both sides; upper three 

 inmf. f^'^T t^i^^. the others, usually 4-5 cm. long, doubly serrate, the odd one 

 cormnonly rhomboid the others usually obliquely ovate; flowers 12-18 mm. in 

 diameter bractlets lanceolate, much smaller than the oblong-ovate, acute or 

 mucronate sepals PoteriMla arguta Pursh. Meadows and rocky places: N.B. 

 —D.L.— Colo.— Mack. Plmn—Submont. Je-Au. 



T.;nn;t?\v^w"?,°?^ fZ"^^- ^^^V" 3-^ ^™- h^sh, branched above; basal leaves 

 rounded Tf Jir ^^""^'^'-^ upper leaflets broadly obovate, 3-5 cm. long, usually 

 S ovn'S Si^Pf • ^P'T'"I^y short-hairy, coarsely and deeply doubly serrate, 

 5 mm lol M ^ """^"'a u^^^*l. ?^°"^ orbicular; sepals ovate-lanceolate, acute, 

 Smm.^ng. Meadows: Alta.-B.C.-n Colo. -Wash. Suhmonl.-Mont. Je-Au. 



basal Weft?^^*f^*-^^'?^-i ^^^™ *^"' ^^^'^t, 4-10 dm. high, long-villous ; 

 ?hTinner 3 5 cm lo^'^^^l"'" \^^'^l ^^^' ^"g^^^J' long-pubescent or |labrate 

 cised the Intpr Tfl f "' ^l^ombic-obovate and acute, coarsely serrate and in- 

 Zvkte white !tit T"' ''Tf ''' 5?^'"'"' 1^18 mm. in diameter; petals broadly 

 mZI'^Nm''- ^ri^Si'r J^Au^^^' "P^^^ ovate-laneeolJte. Valleys: 



or in lowefSow.T*'''' ?^'^^- ?*'"^ ^^^^t' ^^^^er, striate, 2-3 dm. high, 

 5^^ SS-?^^^^^^^^^ basal leaves'several; leaflets 



flabellifnrm +T,n u\Z ^^ i i- S^'ioi^aLe, tne terminal one obovate to cuneate- 



semte and inched ^f. T^ obhquely eUiptic or nearly orbicular, all coarsely 

 flowSs 1?^20 mm ' St ^T' f'^^^,^'ld small, the leaflets 3-5 and more rhombic; 



rSd senak owo iT'^TiP^*^^ ^'■?^^'>' «bovate, e.xceeding the sepals by 

 S,Z^?// i!?S.,r'^*rH'^^'^°l'^t«' pointed. Mountains: Alta.-n Wvo -Ida. 



Submont. — Subalp. Je-Au. 



withittM^'the u^S Si ^^ ^1-- ^'t' ^'''''"^ i^^^^« 1-1-^ 'i™- '^'^f ' 



hairy and glanSr-atomKni !n rhombic-obovate, 4-5 cm. long, sparingly 

 leaflets more rounded ZSr?' ''T^''^^ *"*^ '""^^ «»• ^^^^ doubly serrate; lower 

 rhombic leaflets cvme mtWn ""'^'^r' 3-5-foliolate, all with rather large and 

 acmninate. .5^6 m'm lon\ ' ?^^^^^ -Pak lanceolate, acute or 



".>"• — xie I 



6. D. valida (Greene) Piper. 



4-10 



terminal 



orbicular, all coarsely serrate Vt^m 1 ^^^""^l ^"^^ obliquely elliptic or nearly 

 and acutish leaflets- flowe*'ll^'''^ ^^^'^'•' sometimes more rhombic 



pointed; petals yellow broadlv tli;"!^" ^^ diameter; sepals ovate-lanceolate, 

 D. gluiinosa (Nutt) Mb mIh ^*'V^ "^^'"1^ orbicular, 8-10 mm. long. 



very leafy; basal leavi with shoJ^^inlT' ^^^ ^™-' ^^ sometimes 4 dm. high, 



es witn Short petioles, pmnate; leaflets, as a rule, 9, nearly 



