CRUCIFERZ. 35 
North America, from within the Arctic circle southward; very rare in the southern 
hemisphere. Fournier, who has since monographed the genus, describes 160 species ; 
but he includes Eutrema and Braya, which would give an additional twenty species. 
Y 1, Sisymbrium auriculatum, A. Gray, Pl. Wright. i. p. 8. 
Trexas.—Norta MExIco. 
Var. 6. San Antonio de Alanzanes (Gregq). 
9. Sisymbrium berlandieri, Fourn. Thése Crucif. p. 105. 
SourH Mexico, near the city of Mexico (Berlandier, 570). 
3. Sisymbrium canescens, Nutt. Gen. ii. p. 68. | 
In Norrn America from the Arctic circle to—Souta Mexico, peak of Orizaba, at 
12,000 feet (Linden, 1006), Tacubaya (Graham, 137).—WestERN SouTH AMERICA. 
Hb. Kew. | 
~ 4. Sisymbrium coulteri, Hemsley, Diag. Pl. Nov. pars alt. p. 18. 
Annuum elatum pilosum, caule crassiusculo vix ramoso parte inferiore dense folioso, foliis caulinis 
sesssilibus amplexicaulibus inferioribus lyratis intermediis dentatis superioribus integris, 
racemis valde elongatis, pedicellis quam flores longioribus adscendentibus, floribus parvis albis, 
siliquis levibus pedicellis equilongis polyspermis, seminibus biordinatis minute punctatis, co- 
tyledonibus oblique incumbentibus. . 
Herba annua, erecta, vix ramosa, circiter bipedalis, plus minusve pilosa vel fere villosa, pilis longius- 
culis patentibus simplicibus. Folia radicalia mihi ignota ; caulina omnia sessilia, amplexicaulia ; 
inferiora lyrata, circiter 3-pollicaria, intermedia gradatim minora et minus grosse dentata ; supe- 
riora integra, basi valde cordato-auriculata, lobis rotundatis. Racemi usque pedales, pedicellis 
demum 3-5 lin. longis, rectis vel leviter curvatis adscendentibus. Flores albi, circiter 2 lin. 
longi, pedicellis breviores; sepala ovato-oblonga, obtusa, extus pilosa, margine scariosa integra ; 
petala oblonga, obtusa, brevissime unguiculata, sepalis paulo longiora ; stamina inclusa, fila- 
mentis filiformibus. Siliqua glabra, crassiuscula, teres, circiter 4 lin. longa, erecta ; semina 
minuta, numerosissima, biordinata, punctulata, cotyledonibus parvis, oblique incumbentibus. 
Norra Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 
14); without locality (Coulter, 675). Hb. Kew. | 
Allied to S. polyspermum, Fournier, but differing in foliage, seed-vessels, &c. 
5. Sisymbrium galeottianum, Fourn. Thése Crucif. p. 59. 
SoutH Mexico. | . 
Var. a. xerophilum. Peak of Orizaba, at 10,000 to 11,000 feet (Galeotti, 4680). 
Var. 8. hygrophilum. Peak of Orizaba, at 8000 to 9000 feet (Galeotti, 4682) ; 
along the road to Mexico (Virlet d Aoust, 564). Hb. Kew. 
v 6. Sisymbrium hispidulum, Pl. et Tr. Prodr. Fl. N. Gren. i. p. 63? 
Turritis hispida, DC. 
Mexico, valley of Mexico on the Zapan road (Bourgeau, 285).—CoLomB1a, Ecuapor. 
Hb. Kew. ; 
f2 
