CruCiferae (mustard family) 219 



petioledj 15-30 mm. long: raceme crowded even in fruit: petals obovate, 

 emai'ginate, 3-7 mm. 'long: gilique subglobose, 6^8 mm. in diameter, twice 

 as long as the style; pedicels stout, recurved, '5-10 mm. long.^-Naked cl&,y 

 ridges and flats; Red Desert, Wyoming. ' ■ 



3. LesquereUa'prostrata A. Nds. Bull. Tbit. Bot. Club 26: 124. 1899. 

 The stellate-pubescence dense and silvery: stems several to many, rosulately 

 spreading, sometimes branched: crown-leaves densely rosulate, rhomboidal, 

 orbicular, oval or oblong, 5-15 mm. long, the petioles often longer; cauline 

 few, oblanceolate to linear: raceme in fruit 6-12 cm. long: silique subglobose 

 or broadly' oVate, as long as the style but somewhat surpassed by the curved, 

 spr^ii'diilfe' or recurved pedicel. [L. viahensis Rydb. Bull. Torr. Bot. Club 

 30: 252. 1903; L. Maamnii Greene, Pitt. 4: 310. 1901 (?).]— Wyoming, Utah, 

 and probably Colorado. 



4. Lesquerella condensata A. Nels. Bull. Torr. Bot. Club 26: 228. 1899. 

 Depressed-caespitose, the caudex riiulticipltal, not rising above the ground, 

 abaulescent,'the linear i leaves and small crowded racemes on the, crowns and 

 subequal: ^petals spatulate, about 6 mm. long: silique ovate, compressed at. 

 summit, 5 mm. long, two-ovuled in each cell • (usually only one maturing). 

 (L. parvida Greene, Pitt. 4: 308. 1901.) — Barren and rocky slppes; one of the 

 earhest plants to bloom; southern Wyoming and in Colorado. 



5. Lesquerella alpina (Nntt.) Wats. Proc. Am. Acad. 23: 251. 1888. Cau- 

 dex few-Dra;n6lied; tHe branches usually 'rising ifew; cm. above the ground, 

 thickly covered with the jpersistent leaf-bases: leaves all linear, tufted on the 

 seveiral' crowns an4 on the base of the very short stems: raceme slender- 

 pedunculatej of^en few-flowered; the pedicels slender, erect or recurvtid) much 

 longer than the silique: sihque ovate, somewhat angled but sckrcely com- 

 pressed, 3-4 mm. long, nearly equaled by the slender style. (L. spathidata 

 Rydb. Cont. U. S. Natl Herb. 3;4S§.1896,)— The upper Missouri region. 



6. J Lesquerella curvipes A. Nels. Bull. Torr. Bot. Club 25: 205. 1898. 

 Sttos numerous on the expanded crown of the i woody root, in fruit 1.5-3 dm. 

 Ictog: raidical' leaves oblanceolate, on margined petioles; cauline oblanceolate 

 to ' linear, 'tvith a narrowed petiole-like base, 3-6 cm. long: siliques ovate, com- 

 pressed at summit, gibboUsly convex toward the base, about 8 mm. long; 

 the^slender B(tyle_ sopi^vJiat shcprter; pedicels 1-2 cm. Ipng, "s "-shaped (the 

 prpx^naj I part curved upward, the distal downward, with ascehdmg tip): 

 seed8,2 in leach.qell, rarely 1 or S.-TrWyoming. , ^ 



.7.,£iesqUieFefla.mQiitaiia (Gray) Wats. Prpc. Aim. Acad, 23: 251,, 1888. 

 Cay.de;x usually siniple, the leaves And ^tems rosulate-spreading: stems mostly , 

 simple, sKort: crown-leaves crowded, some of them broad (6rBictllar,.obovatei 

 or rhomboid), passing into the oblanceolate ones of the stems, 1-2 cm. Iphgi 

 sihques oblong, not compressed at, summit ; but sometimes sUghtly quad- 

 rangular, about 6 mm. long, somewhat exceeding the style, usually erect on 

 the tipfWardly turned' tip of the widely divaricate- subequal pedicel. (L. 

 SHeari^ Rydb; BtiU. Torr. Bot. Clubi29: 237. 1902; L. rosulaia A. Nels. Bull. 

 Torr."Bot. Club 25: 205. 1898.)— Colorado aAd-southem Wyoming> , .: 



8. Lesquerella valida Greene, Pitt. 4: 68. 1899. Silvery lepidote-stellate, , 

 the.ilgaves and.^st^ms crowning a. taproot: stems decumbent,. 1-2 dm.^liigh: 

 basal leaves entire 9r toothed, pljoyatg or spatiilate, petiol'ed; cauline ob- 

 lancepiate: raceme short and dense, hardly more than coryinbose even in 

 fruit: siliques pvate, someyhat compressed, tipped with a style. of half their 

 oymfength;, the, cells about 6-ovuled. — Southern 'Cplorado and New Mexi'co. 



i^' LesquerellaFejidleri (Gray) 'Wats, Proc. Am. Acad. 23: 251.'1S88. White- 

 canescent: caudex fnulticipital; stems several, slender, erect; 1-2 dm. hi^: 

 leaves all linear or narrowly oblanceolate: raceme short, dense: siliques 

 glabrous, subglobose, 4-6 mm.' in diameter, on slender much longer erect 



eedicels; the style about equal in length; the cells 10-16-ovuled. — Southern 

 Morado to Texas. • ,' ^ ^i' ••'*■-.. /" '.■■, ■., ,-„. ,(„;,,,,„;,! i,,,,„,, 



10. Lefe^uerella .Eflgeltnannii Wats; 1. c. 254. Silvery canesceht: stems 

 low And' simply 'or talter' and 'branched, 1-3 dm. long: some off the radical 

 leaves broad '(orbicular to oblanceolate), petioled; cauline oblong or oblanceo- 



