136 CRUCIFER.E. Eutnma. 



acutisli ; the cauline 1 to 2, mostly petiolate, rarely oue of them sessile : fruit narrowly 

 linear, many times exceeding the pedicel- septum complete. — Bull. Soc. Nat. Mosc. x.xvii. 

 pt. 2, 305 ; Wats. Hihl. Iiidex, 64. — Labrador. A species not seen by the writer, and per- 

 haps to be referred to Brui/a. Tlie description is condensed from that of Tui'czaninow. 

 B. arenicola, Kichakds. Glabrous, iialf inch to two or three inches hi^h : stems several, 

 springing from a slender elongating branching rhizome •. leaves spatulate, sleuder-petioled, 

 chiefly clustered at the base, obtuse, entire or nearly so ; the cauline two or three : flowers 

 purplish: pods linear-ublong ; stigma nearly cajiitate; septum imperforate, sometimes 

 obscurely nerved. — Richards, in Hook. Fl. Eor.-Am. i. 67, t. 24; Torr. & Gray, Fl. i. 112. 

 Smeloivskia cinerea, C. A. Mey. 1. c. 171, in part. Purri/d areuicola, Hook. f. Arct. PI. 28.5, 

 315; Benth. & Hook. Gen. i. 67. — In sand on the shores of Arctic America between 107° 

 and 150° west long., Rick<irdson, Franklin, Back; Glovonin Bay, Alaska, Muir ; Grinnell 

 Land ? Grceli/. 



26. SMEL6WSKIA, C. a. Meyer. (Professor T. Smclowski, a hotaiiist 

 of St. Petersburg, who died 181 o.) — Low and cespitose perennials, canescent 

 with fine stellately branclied liairs and sometimes suffrutescent below. Leaves 

 pinnatifid or bipinnatifid, rarely some of them entire. Flowers small, white, 

 pale yellow, or purplish tinged. Two species are natives of Vi. N. America, the 

 others of mountainous districts in Central Asia. — Mey. in I^edeb. Fl. Alt. iii. 

 1G5; Ledeb. Ic. t. 151; Benth. & Hook. Gen. i. 79; Pranil. 1. c. 192. [By 

 B. L. Robinson.] 



S. calycina, C. A. Meyer. Very variable in foliage, finely stellatc-]mbcscent and usually 

 cincreous-villous with longer simple hairs: caudex stout, branched, clothed Mith the scaly 

 bases of former leaves: leaves soft in texture, usually deeply pinnatifid, with 2 to several 

 pairs of linear to obovate obtuse segments and a terminal one of similar shape and size ; 

 rarely a few of the radical leaves oblanceolate, quite entire : stems several, an inch to a span 

 high : racemes at first dense and subcorymbose, but becoming elongated in fruit ; pedicels 

 ascending or erect, villous as well as the narrow sepals: petals exserted, with a broad 

 patulous rounded blade, white or nearly so, about 2 lines in length : capsule usually lanceo- 

 late, attenuate at each end (but very variable, occasionally short and obovate), tipped with 

 a short slender style, and capitate obscurely 2-lobed stigma; seeds few. — Mey. 1. c. 170; 

 Gray, Proc. Acad. Philad. 186;3, 58; Wats. Bot. King Exp. 24. Hutchinsin cali/clim, Desv. 

 Jour. Bot. iii. 168 (1814); Hook. Fl. Bor.-Am. \. 58, t. 17, f. B. II. calf/clna,\aT. Jmerifnna, 

 Regel & Herder, PI. Seminov. ii. 145. — Mountain slopes, often at considerable altitudes, 

 Colorado to N. Central California, and northward to Alaska. (Siberia.) 



S. Fremontii, Watson. Less canescent: foliage more finely divided and niiuli more 

 rigid in texture: leaves all pinnate ; segments narrow, linear, bristle-tipped and imngcnt ; 

 sepals ovate or oblong, glabrous : petals' white pedicels ascending or spreading, smooth: 

 capsules linear, tetragonal, 4 to 5 lines long, tipped with a short style ; seeds rather numer- 

 ous. — Proc. Am. Acad. xi. 123 ; Brew. & Wats. Bot. Calif, i. 42. Brai/a pectimila, (Jreene, 

 Erythea, iii. 69, as to character and habitat. — A very distinct species, but apparently to be 

 referred to this genus. Growing on hills and in mountain valleys of N. California, Lemmon, 

 Mrs. Austin, Miss Plummer, and Oregon, Fremont, Howell, Cusick. 



27. SISYMBRIUM, Tourn. Hedge Mustard. (Name from the 

 ancient Greek aicrviJ./3pLov, which designated some pungent plant, not certiiiidy 

 identified.) — A large and somewhat heterogeneous group, of late considerably 

 divided by various authors. The genus Alliaria, through its strikingly dift'erent 

 habit, may well be separated. Stenophragma, on the other hand, if extended as 

 suggested by Prantl, loses its sharpness of definition, both as to habit and tech- 

 nical character. Deseurainia, if confined to S. Sophia and its allies, undoubtedly 

 forms a natural and homogeneous group ; but satisfactory technical characters 



