i 



358 BRASSICACEAE 



Pod about 2 mm. wide, obtuse. 25 A Eaaleslonii 



Leaves thm, green; stem branched. 2& Arecondm 



ri^^'L^^.^t^ ^^^ ' ^"^ branched hairs or merely ciliate on th^- margins 



ijtkivurs utJiiseiy naxry, 0*7 a c./,*i,7^oy* 



Leaves densely hairy, 



sparingly " 



27. ^. setulosa. 



T>i °i^**'^^*&^j uairy or merely ciuate. 



tJ^T"^^ ^^* g aucous; pods 3 cm. long; seeds in one row but irregularly so. 



T ^^^^ ^[^' ^^^^^^^,^^ somewhat hairy. 28. A. rugocarpa, 



VlJ^f^^J^"^' almost perfectly glabrous. 29. A. oxylobJa. 



Plant glaucous or bluish-green ; pods 4-5 cm. long; seeds in two rows. 



30. A. spaii folia. 



Pedicels and calyx long-cihate. ^I- Arcitatae. ;,,r./.ffan5 



Pedicels glabrous or merelv stellate. ' pereiegans. 



Calyx more or less stellate; petals 8 mm. long. 



St^m ^"?n Hr; I?^A^S^^^^^^^*^^ ^-^ ^^- ^^ng' entire. 33. >1, Bowr^orii. 



Stem 0-10 dm. high; basal leaves 5-10 cm. long, denticulate. 



Calyx glabrous or nearly so. "'^^* "^' ^'^^^'^ 



Leaves decidedly stellate; plants biennial 



Pods straight or slightly curved upwards, ascending-spreading. 



Tkr^rTt, ,>,«„^ 1 . 32. A. brachycarpa. 



Pods more or less arcuate and somewhat drooping 



P^.i! f~l^ ^^\ ^^"^= P^*?'^ ^-1^ ^^^^- long. 35. A. Stokesiae, 



Pods 4-6 cm. long; petals 5-8 mm. long. 



btem-leaves narrowly Igjiceolate. 



Petals 8-10 mm. long, purple. 36. A. divaricarpa. 



Petals about 5 mm. long, white or pinkish. 37. A. densicaulis, 



Lea^-es coa^rrer/lSte^Sut^e'; "p^^tf perennial. ''■ ^^ ^^"^"^^^'^- 



totem-leave- conspicuously sagittate at the base; sepals linear-oblong. 



<^foTvt ^a^.r^^ « '4-u • . 39. A. gracilenta. 



^;^f» ff ^^*^ inconspicuous auricles at the base; sepals broadly elUptic. 

 Basal leaves sparingly hirsute; stem-leaves lanceolate. 1.5-3 cm. long. 



Basal leaves densely hairy; stem-leaves oblong-lanceolate. 1-1.5 cm. 'long. 



27. A. setulosa. 



^^ , , ^IL Retrofractae. 



Stem-leaves decidedly sagittate at the base. 



Pedfc'eltf"^^^^^^ '^'^^^y (^^eept in A, Ugnifera); biennials. 



Leaves dentate. 

 Leaves entire. 



41. A. consanguinea 



i^d^ In ?w^ l^T'- pod 3-^ cm,, long; sepals stellate. 42. A. lignifera. 

 Seeds lu two rows; pod less than 3 cm. long; sepals glabrous. 



Pedicels in fruit strictly reflexed ^^ • ^ • «"-««"*^'^3"« 



Seeds in one row ; pods 4-7 cm. long 



l-etals 6-10 mni. long; stem-leaves usuaUy ample. 



Petals about 5 mm . long ; stem-leaves narrow, serrulate . . 



Pl=vnt ^^ ''^ ^^"^ '■o^^' pod 1-5-3.5 cm. long. I?" A mdma' 



Plant densely cespitose; basal leaves Unear-oblanceolate ; perennikls 



Stem-leaves scarcely sagittate at the base. ""^ • ^ • ^«"^*««* 



Kti-2'"dm^hi°/h'°H°I^=ie«J/*t^^^^^^^ 49. A.exilis.^ 



lyrata 



so! A. pendulocarpa 



Stem 1-3 dm. high, glabrous or sparingly pubescent below; 



\nnp- emrinrrlir Un;^,, ,— „T 1 i . . "3 -^ ^ i..I_i.^ in 



1-2.0 cm. long; petals 6-8 mm. 

 eading, &-8 mm. long; pods 1.5-3 

 —bask. Boreal. Ap-Jl. 



inbigua 



or nearly 

 leaves s 



.—S 



iv tn Ko 1 1 , u™ ^'■anched at the base, 2-4 dm. high, glabrous 



nJni.f 1-'''"'^ glabrous or sparingly pubescent, 2-4 cm long; stem- 



fn,it"«.f.n,W ' ff^^^r,'^'" toothed; petals white, about 6 mm. long; pedicels in 



Sy nW ^Alu MnnT- \^^'' ^"^1^."' °^ ^^^^^^ «^' ^ ^ cm^'lSng. Wet 

 rocKy places. Alta.— Mont.— Wash.— Alaska; e Asia. Subalp. My-Au. 



fitPm^ 1 'q^i^*t- i ^' L-.^<^bins. Biennial or perennial, more or less cespitose; 

 stems 1-3 dm high, sparmgly hirsute below; basal leaves short-petioled, spatu- 



npdiiu s^- ,!^^' ^^^'^i-^^^^^^f oblanceolate, sessile; petals white; 4-6 mm. long; 



SfmmHin M °^- ^T^FvP°.^? l"^ ^™- ^""g- ^- spathulata Nutt., not DC. 

 Mountams. Mont.— Ijtah— Wash. Submont.—Mont My-Jl. 



