356 BRASSICACEAE 



43. D. oxyloba Greene. Cespitose perennial; stems 2-5 dm. high, leafy; 

 basal leaves 2-4 cm. long, oblanceolate, remotely dentate or entire, finely ap- 

 pressed-stellate; stem-leaves ovate or lanceolate; petals golden yellow, 4-5 mm. 

 long; pedicels ascendmg-spreading, about 8 mm. long; pods 8-10 mm. long, 

 Z mm. wide, finely pubescent. Mountains: Colo. Submont .—M ont . Jl. 



^*** -^i: ^^l^^T^^a Greene. Cespitose perennial; stems 2-4 dm. high, hir- 

 sute, with branched hairs; basal leaves spatulate or oblanceolate, 2-3 cm. long, 

 loosely stellate; stem-leaves oblong or lanceolate; petals golden yellow, 6 mm. 

 long; pedicels about 1 cm. long, ascending; pod nearly 1 cm. long. D. aurea 



stylosa A. way. Canons in the mountains: N.M.— Colo.— Utah. Submont.— 

 Mont. My-Jl. 



+ if^; D. luteola Greene. Cespitose perennial; stem 1.5-4 dm. high, cinerous- 

 steilate; basal leaves oblanceolate, usually entire, 2-5 cm. long; stem-leaves 

 entire or dentate; petals 5-6 mm. long, light yellow; pedicels ascending, 7-8 

 mm. long; pod erect, 10-18 mm. long, 3 mm. wide, stellate. Mountains: 

 Colo.— Utah. Mont.~Alp. Jl. 



46. D. surculifera A. Nels. Cespitose perennial; stems 2-4 dm. high, 

 stellate and villous; basal leaves 3-5 cm, long, oblanceolate, finely and rather 

 sparingly stellate; petals 5 mm. long, golden yellow; pedicels 3-4 mm. long; 

 pod lanceolate, 8-12 rnm. long, finely stellate, straight or somewhat twisted. 

 Mountains: Wyo.— S.D. Submont.—Mont. Jl-Au. 



ot.i'^'+^V ^^^^f^!^"^^-^,^'^^- ^ slender, cespitose, grayish stellate plant; 

 stem strict, 2-4 dm. high; basal leaves spatulate, 2-3 cm. long, acute, entire; 

 stem-leaves closely sessile, oblong-lanceolate; pedicels ascending; pod erect, 

 linear to oblong-lanceolate, 10-15 mm. long, about 3 mm. wide, slightly if at all 

 twisted, stellate. D. Bakeri Greene. Mountains: Utah— Colo.-^.D. Mont. 

 — Alp. Je-Au. 



nKu^j; Ji* f^^y^o ^^^^}- Cespitose perennial; stem 1-4 dm. high; basal leaves 

 S 1?- f' K^ om. long, thick, densely stellate; petals yello^v^ 4-6 mm. long; 

 pedicels m fruit about 5 mm. long; pods lanceolate, 10-12 mm. long, 2-3 mm. 



Pri'nl T k'!!^'^'i Pubescent. D. uber A. Nels. Mountains and arctic regions: 

 Greenl— Lab.— Colo.— Anz.— B.C.; Eu. Alp.—Mont. 



decumbens 



2-4 



numer 



Stem-leaves ovate to ovate-lanceolate, sessile, entire; petals pale yellow, about 

 Summitsf^So l^^^'^u ""^^ ^""^ ''^^''"^' ^^^^ ™°'- ^''°^' '^''"^^^^ pubescent. 



?«„ ^?"f?"^^^^^^^f ^^'^^^ ^y*- Perennial; stems several, decumbent or ascend- 

 ^r^<;r.T S ^^^^r^t branches, 1-1.5 dm. high, hirsute; basal leaves oblanceolate 

 PPlK^f. ' ^•'^S''™- ^?°^i stem-leaves few, oblong or lanceolate, sessile; pedi- 



nhlwo ' ^ 'f^-''''^' ^^i^ 'i^^^*^' S-12 mm. long, ascending style almost 

 obsolete. Mountains: Utah. Subalp. Jl. 



Annual 



40. ARABIS L. Rock Cress. Wild 



Tcoiroc! „if^«„ J- ■ -— -o, g,Lu,wxuun, ui puuescent wiin orancneu u-mis 



\TJZttZ %' 'V''^ T^^^y ^^f'*^^^^- I'l^^^^^ Pe^f^ct, in terminal or axil 

 lary racemes, bepals equal or nearlv sn .^^nmAfim^o L^^^i-'^^ +1.^ k^.^ p^f«l 



Ti'Ti.'fr* >.oT.^Ur , n - ~^-r-"- x^^c^.^j. ovj, ouiiictmit;s saccate ai rne oaae. a t;ta^^ 

 h-ei un?nn?nH«lT'^^ T^' % P"?^«' ^^^^^^ ^^^^^^d. Stamens 6; filaments 

 noT'e1«SlS^^^- ^«d« sessile, elongate, flat, the valves sometimes nerved, 

 ?en r^rZll '^^htscent; stigma capitate or 2-lobed. Seeds in 1-2 rows in each 

 cell, marginless, margined, or wmged. Cotyledons accumbent or nearly so. 



perennials 



Basal leaves entire-margindd or toothed ^' LtR-\Tae. 



Pods erect or nearly so. 

 Leaves coarsely hirsute . 



iSllavS enrfcT/"^^*^ VJ ^^l^^^ ^^ the base. II. Furcatae 

 fcstem-ieaves cordate or auricled at the base; biennials. 



III. HiBSrTAE. 



