136 CRUCIFER.E. Eutrema. 



acutish ; the cauliue 1 to 2, mostly petiolate, rarely oue of tliem sessile . fruit narrowly 

 linear, many times exceeding the pedicel : septum complete. — Bull. Soc. Nat. Mosc. xxvii. 

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

 haps to be referred to Braya. The description is conden.sed from that of Turczaninow. 

 E. arenicola, Richards. Glabrous, half inch to two or three inches high : stems several, 

 springing from a slender elongating branching rliizome •, leaves spatulate, slender-petioled, 

 chiefly clustered at the base, obtuse, entire or nearl}' so; tlie cauline two or three: flowers 

 piirplish : pods linear-oblong ; stigma nearly capitate ; septum imperforate, sometimes 

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

 Smelowskia cinerea, C. A. Mey. 1. c. 171, in ])art. Parrija arenicola, Hook. f. Arct. PI. 285, 

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

 and 150° west long., Richardson, Franklin, Back ; Glovonin Bay, Alaska, il/w/?-; Grinuell 

 Land ? Greely. 



26. SMELOWSKIA, C. A. Meyer. {Professor T. Smelowski, a botanist 

 of St. Petersburg, who died 1815.) — Low and cespitose perennials, canescent 

 with fine stellately branched hairs 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 W. N. Amerida, the 

 others of mountainous districts in Central Asia. — Mey. in Ledeb. Fl. Alt. iii. 

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

 B. L. Robinson.] 



S. calycina, C. A. Meyer. Very variable in foliage, finely stellate-pubescent and usually 

 cinereous-villous with longer simple hairs : caudex stout, branched, clothed with 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 sliape 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, al)out 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. 1863, 58; Wats. Bot. King Exp. 24. Hutchinsia cali/cina, Desv. 

 Jour. Bot. iii. 168 (1814) ; Hook. Fl. Bor.-Am. i. 58, t. 17, f. B. H. calycina, var. Americana, 

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

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



S. Premontii, Watson. Less canescent r foliage more finely divided and much more 

 rigid in texture: leaves all pinnate; segments narrow, linear, liristle-tipped and pungent 

 sepals ovate or oblong, glabrous : petals wliite 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. Braya pectinata, Greene, 

 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 Pliimmer, and Oregon, Fremont, Howell, Cusick. 



27. SIST^MBRIUM, Tourn. HedCxE Mustard. (Name from the 

 ancient Greek cna-vix^piov, which designated some pungent plant, not certainly 

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

 divided by various authors. The genus Alliaria, through its strikingly different 

 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 tecli- 

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

 forms a natural and homogeneous group ; but satisfactory technical characters 



