CKUC'IFERAE. (mUSTABD ,irAMILY) 217 



Leayes pinnate^ . 

 Lwvea and plant small, 1-2 dm, high , ; . . . . 8, C. imijuga. 

 Leaves and plant larger, 2-i dm. high. 



' ' Leaflets ovate to rotund , . • • > • • . - 4. C. Brewed. 

 Leaflets linear to elliptic . . 5. C. pennsylvanica. 



1. Cardamine cordifolia Gray, PL Fendl. 8. 1848. Glabrous throiighout, 

 3-8 dm. high',' leafy to the top: leaves cordate, sparingly repaiid-dentate or 

 angular-toothed, S-8 ciri. long; the lowest often orbicular and the uppermost 

 triangular-cordate: flowers white, rather large: siliques 3-4 cm. long erect on 

 ascending pedicels. — ^Along streamlets in the moimtaifas; New Mexico to 

 Ida,ho. 



2. Cardamine infausta Greene, Pitt. 4: 307. 1901. Quite similaif' to the 

 preceding but the stem, petioles, and pedicels, and to a less degree the' leaves, 

 liibre or less whitened with a" shalggy hirsute pubescence: flowers smaller; the 

 petals spdtulate. (Ci cardiophylia Rydb. Bull. Torr. Bot.'Glub 28: 280. 1901.> 

 — Utah and southwestern Colorado to Arizqna. ' 



3. Cardamine unijuga Rydb. Bull. Torr. Bot. Club 24: 246. 1897. Gla- 

 brous: stems from very slender rootstocks, simple or braiiohing, 1-2 dm. high: 

 basal leaves simple, cordate, or reniform; lower stem leaves with 1 or 2 pairs 

 of smaU oblong leaflets; the upper similar or reduced and entire: raceme slen- 

 der: sepals obtuse, half as long as the white 2 mm. long petals: siliques linear, 

 15-20 nim. long, erect, oh erect pedicigls and with short style.— ^Wyoming and 

 Montana. 



4. Cardamine Breweri Wats. Proc. Am. Acad. 10: 339. 1875. Glabrous, 

 2-4 dm. high: stems simple qr branched from the basa: radical leaves simple 

 or with a pair of roundfed lateral leaflets, round-cordate, entire or sinuate; 

 cauline pinnatej.wjlh; 5-7 lefl,flets; leaflets from oblong or ovate to orbicular, 

 the tenninaj, one much, tie largest, crenately toothed or lobed: flowers white, 

 20-25 mm. flong, ascending, on ascending pedicels half as' long: style short 

 or wanting. (C. .joqUicola Greene, Pitt. 3: 116. 1896.) — Colorado, southward 

 and, westward to Oregon. ! 



" b. Cardamine pennsylvanica Muhl. in WiUd. Spec. 3 : 486. 1800. Glabrous, 

 erect, simple, or branched from the base, leafy up to the racemes of small 

 white flowers: basal leaves pinnate, with 9-17 small oblong-oval entire or 

 toothed leaflets; the leaflets of the upper leaves usually oblong with- some- 

 what narrowed base' deeurrent upon the rachis: siliques linear, 20-30 mm. 

 long, erect when mature, on somewhat divergent pedicels, C hirsuta. — 

 Colorado tO' Montana and across the continent. ' 



14. PHYSARIA Gray.' Double Bijaddbr Pod 



Low and stellately canescent perennials with stems simple or branched 

 from the base, simple leaves, and yellow, 'racemose flowers. Siliques membra- 

 nous, the two cells inflated-globose and; joined by the narrow septjim. . 



Constriction separating the cells equally deep above and below, cells , 



globose 1. P. didymooarpa. 



Constriction separd.ting the cells much deeper above. 



, Leaves lyrate^or panduriform . . . . . 4.2, P. vitulifera. 

 Lesives oblancecAate, sinuately toothed. 



Cells of silique sphericaU small , 3. P. floribunda. 



Cells of silique flattened laterally, large 4. P. Newberryi. 



1. Physaria didymocarpa Gray, Wats. Bot. King's Ejcp. 20, lS71- densely 

 steUate-canescelit:! leaves, andwStemsrosulately crO|wded.pn"the crowii o;f,the 

 thick root, 10-20 cm. high,: radical leaves, ovate to broadly spatulate, entire 

 or sinuately toothed, obtu.se or acute,., petic^ed; cauline phlanceplate, to, (i^ear: 

 sepals lanceolate, surpassed by the large showy pale yellow petals: style 

 slender, persistent, 6^6 mm. long: sijique tjfteply and equally notclied aboyp 

 and below; the. cells 8-10 mm,, in diameter, walls, papery. — Cplorado-to Brit- 

 ish America and far westward. , .' ., hii u 



la. Physiiria didymoc,arpa lanata A. Nel^. Pull. Torr., Bot. Club, i31;, 241. 

 1904; Much like the spefiies:, but wMte-iomentose with, a copiou^i siinple 



