roripa. CRUCIFER.E. 41 



BARBAREA. 



R. curvisiliqua Bessey Mem. Torr. club v. 169. Nasturtium curvisili- 

 qua, Nutt. Glabrous, usually erect, diffusely branched 3-12 inches high 

 from an annual root : leaves narrowly oblong or oblanceolate pinnatitid 

 with oblong usually toothed lobes, rarely only sinuate toothed: flowers 

 yellow in rather dense racemes : petals a little exceeding the sepals : pods 

 rather slender, 4-8 lines long, about equaling the pedicels, often curved. 

 On rich, alluvial river bottoms, British Columbia to Lower California. 



R. lyrata Greene Man. 20. Nasturtium lyratum Nutt. Stems erect or 

 decumbent, commonly diffusely branched from the base : leaves lyrate or 

 pinnatitid, the segments oblong-lanceolate, inciseiy serrate or angularly 

 toothed: pods linear, compressed, 8-10 lines long, more than twice the 

 length of the pedicel, slightly curved, obtuse, tipped with the very short 

 style. On muddy banks and in wet places, Oregon and northern Cali- 

 ornia. 



R. polymorpha. Nasturtium polymorplium Nutt. T. & G. i, 74. Stems 

 6-10 inches high from an annual or biennial root : leaves rather narrow, 

 deeply pinnatitid or almost entire, the segments entire, short, linear 

 acute : flowers small ; the petals scarcely longer than the calyx : pods ob- 

 long-linear compressed : stigma minute, nearly sessile. "Banks of the Ore- 

 gon, Nutt." Moist places. Willamette and lower Columbia valleys. 



R. tenerrima Greene Eryth. iii, 46. Glabrous : stems weak and de- 

 cumbent sparingly branched 6-10 inches long from ah annual root : leaves 

 few lyrately pinnatifid, the terminal lobe acutish, rachis of the few ra- 

 cemes almost capillary : pods subcorneal to ovate-laaceolate slightly 

 curved, the apex surmounted by a considerable beak-like style : valves and 

 partition both very thin : seeds many in 2 rows under each valve. On 

 moist banks, eastern California and western Nevada to Washington and 

 Wyoming. 



5 BARBAREA R. Br. in Ait f. Kew. ed. 2. iv. 109. 



Glabrous erect branching biennial or perennial herbs with an- 

 gled stems and entire or pinnatifid leaves. Sepals oblong, often 

 colored : the lateral pair often saccate at base and slightly con- 

 nate on the back near the apex. Petals spatulate or with obovate 

 blade and slender claws. Stamens 6, free and unappendaged, dis- 

 tinctly tetradynamous. Style short : stigma bifid. Pods linear, 

 elongated, somewhat 4-angled. Seeds in one row in each cell. 

 Cotyledons slightly oblique. 



B. vulgaris R. Br. 1. c. Stems erect, 1-3 feet high, simple or corym- 

 bosely branched, somewhat angled : radical and lower caudate leaves usu- 

 ally pinnately parted, the terminal lobe ovate or orbicular, rounded at the 

 apex and varying from cuneate to cordate at base, entire or with a few 

 rounded teeth or lobes ; lateral segments very variable usually oblong, en- 

 tire or toothed : petioles auriculate at base : upper leaves entire or toothed, 

 clasping at base : flowers in a short dense oblong raceme, bright yellow: 

 petals nearly or quite twice as long as the sepals : pods ascending or sub- 

 erect upon more or less spreading pedicels. Common along streams and in 

 cultivated fields. Lower California to Alaska and across the continent. 



B. stricta Andrz. Bess. Enum. 72. Stems erect 1-2 feet high, leaves 

 yrately pinnatifid with a large rounded terminal lobe and 1-5 pairs of lat- 

 eral ones : flowers pale yellow, during anthesis closely aggregate and sub- 

 corymbose : petals usually not over a third or half longer than the ca- 

 lyx : pods mostly appresscd to the elongated rachis. Along streams etc., 

 California to Alaska and across the continent. 



