430 ROSACEAE 



Sepals ovate or ovate-lanceolate; petals yellow, strongly ascending. 



Hj-panthium and calyx densely hairy with black glandular hairs, only slightly to- 

 mentose. 3. D. Drummondii. 



Ji ypanthiiim and caljrx densely white-tomentose, not glandular. 4. D. tomentosa. 



1. D. integrifolia Vahl. Leaf-blades lanceolate or elliptic-lanceolate, 

 rounded, truncate, or subcordate at the base, acutish at the apex, 6-25 mm. long, 

 usually with entire revolute margins, densely white-tomentose beneath, glabrate 

 and shinmg above; scapes 5-15 cm. long, tomentose; hypanthium and calyx 

 tomentose and usually more or less densely black- or brown-hairy; sepals linear 

 or Imcar-lanceolate, 5 mm. long; petals white, elliptic, 8-12 mm. long. Ridges: 

 Greenl.— Lab.— N.H.— B.C.— Alaska. Alp. Je^Jl. 



2. p. octopetala L. Leaf-blades oblong, elliptic or oval, white-tomentose 

 beneath, glabrate and dull above, &-25 mm. long, rounded or obtuse at both 

 ends or subcordate at the base; scape 5-20 cm. long, tomentose and more or 

 less black-hairy; hj-panthium black-hairy and tomentose; petals white, elliptic 

 or pbovate-elliptic 1-1.5 cm. long. Ridges: Greenl.— Colo.— Wash.— Alaska; 

 alpme and arctic Eurasia. Alp.^Subalp. Je-Au. * 



1 ^* ^-.^Dfuniinondii Richards. Leaf-blades elliptic or obovate, 1-3 cm. 

 long, white-tomentose beneath, dark green, dull, slightly tomentose or glabrous 

 rS' I^^'^Yu """"^ ^on^ewhat rugose, coarsely crenate, acute at the base and 

 Ih^lZ ^ I T''' ^'^P'^ ^2^ ^""- long' tomentose and somewhat black-hairy 



One Mr^ff ^n^""'^' ^^r'^'^W '''^- ^^^g' elliptic-spatulate or obovate. Ridges: 

 Que^-Mont.-Ore.-B.C.-Mack. Alp.-Subalp J^Au. 



crenate'';cuteSrK!l";^,!t^;!^l«bovate or elliptic, 1-2 cm. long, coarsely 



rounded 



creen ibnvp t,v, tJ k — ^^^^^^ a,u tuc d,pt;x, lomeniose on DOin siaes, gmyi^n 

 Ssov^tp'^l 1^™''^^^'/'^''?,^ ^-^0 ''in- l«ng. densely white-tomentose 

 BC Subaln tT" ''^' ^'*^^ y^^^'^'- spat^late, 8 mm. long. Ridges: Alta.- 



26. GEUM L. AvENs. 



Iar.re teSil dK^-^inr*^.™''*;'**''^'-, ^^^^^ ^^^^^s lyrately odd-pinnate, with 

 biact-Hke Sti^^^ n'' ^^t'^f^'^T ^^^' '^^^''^d, mok often 3-fid or the upper 

 Flowers cVmoleV. persistent, adnate to the clasping bases of the petioles, 

 i- lowers cymoseiy corymbose. Hynanthium turhir^ut^^ h.^i.r.u..\n or snucer- 



shaoed Rrno+Ufa rC — :■ ■'^-^i^^V'^'""™ turbinate, hemispheric, or saucer- 

 PetaL 5 orScnIar 1' 'T'*™^' "^^^''^d- Sepals 5 imbricate or valvate. 

 ous in se^Jral trJ. fi?^''^ ^I ^^V^"^*^' >'^"o^^'' ^^^1^^^, or red. Stamens numer- 

 clavate recent Jvt'f /^""^rr' ^'^^' ^^'^''''^- P^^tils numerous, inserted on a 

 S th^imtfer ^n ?^ %^^-^,"™^ terminal, strongly curved knd geniculate 

 sS erect^ ^^ ^ deciduous. Achenes smalf dry, with a hooked beak. 



^'^fef whfteZ^o'^Cterot ""l^^nfl^ ]^' t^"^ "'i^'^Wrd as long as the lower. 



achenes o'-^oieucoui, . receptacle long-hairy; hairs at least lialf as long as the 



Petals 



1. G. canadense 



x^eatiets of the stem-leaves decurVent on thrracMs, the upper ones confluent. 

 Leaflets of the stem-leaves not decurrent ^- "' ^'"^"''''^'^^■ 



"^ nod^Ett below' no't''.l^nTf' ''"' ^^''^ ^^«^t 1 mm. long; lower inter- 



oeiow. not glandular; petals orbicular, rounded at the base. 



"""^'^ iSf clSLt%1^?L^'i-t-W«^idaloua at the has 'or^glabi^o^ petals 

 • Of the'st'Xg1and.da?-pufellnrP' ^" ""■ P^"""*""^' 1°*'«- i"t'^'-^«de 



''c1nc?co[ymbifo?'m '^S'^/S '^"^Pl'k '''''^^^^ ^' ''•^"^^t^^ ^^?,''^- 

 Divisions of the UD,^^ ^m ^fr *^*^ ^"^O""* branches. 4. G. macrophyllum. 



inflorescence^Pea '^f /. «tfm-leaves oblanceolate or rarely obovate; 



Leaflets doubly ser^?i J^l h®^®?'**"' branches. 



rouaded or reSm "^^'^ ' **^''°^aal leaflet of the basal leaves 



Leaflets especially thoso nf fi,. . 5- ^- oregoncnse._ 



leaflet of the basal Wx^L'H? ^"^J"^^ ^^^^^^s deeply incised; terminal 



ui uae Dasal leaves rhombic, ovate, or subcordate. 



^''^tl^^^^^a:'^^lF,.T^-^^. ^^^^^.■^^m.oa. 



iiirsute 



7. G, rivale. 



tKner'bt'S'le.v'r ^^^ ^"^^ ^gh, finely pubescent or glabrate; 

 me eariier basal leaves reniform or rounded-cordate, round-lobed and 



