CRUCIFERZ. | 87 
12. Sisymbrium schaffineri, Hemsley, Diag. Pl. Nov. pars alt. p. 19. 
Annuum elatum ramosum stellato-pubescens, caule ramisque gracilibus, foliis caulinis lineari- 
lanceolatis remote dentatis vel integris basi attenuatis, racemis numerosis densifloris, floribus 
(flavis ?) minimis brevissime pedicellatis, siliquis teretibus gracilibus quam pedicelli multoties 
longioribus, seminibus uniseriatis, cotyledonibus incumbentibus. . 
Herba annua, erecta, ramosa, circiter bipedalis, tota breviter stellato-pubescens scabridula, caule 
ramisque gracilibus. Folia radicalia non visa; caulina sessilia, lineari-lanceolata, maxima, 2-3- 
pollicaria, remote dentata vel integra, basi attenuata. Racemi densi, terminales 6-9-pollicares, 
laterales breviores patentes, pedicellis demum 1-1} lin. longis. Flores (flavi?) fere sessiles, 
circiter 1 lin. longi; sepala ovato-oblonga, obtusa ; petala obovata, sepalis vix longiora ; fila- 
menta filiformia. Siliqua teres, gracilis, aspera, 5-7 lin. longa, patens ; semina uniseriata, 
cotyledonibus recte incumbentibus. Oo 
Norra Mexico, region of San Luis de Potosi, 6000 to 8000 feet (Parry & Palmer, 
12); Sour Mxxico, around Belen (Schaffner, 2), Zimapan (Coulter, 680). Hb. Kew. 
Remarkable for its slender branching habit, minute flowers, and slender rough 
seed-vessels. | 
S 18, Sisymbrium streptocarpum, Fourn. Thése Crucif. p. 58. 
Sourn Mexico, on the walls of the Aqueduct of Tacubaya (Bourgeau, 9), around the 
city of Mexico (Berlandier, 782), Jalapa (Coulter, 683). Hb. Kew. 
14. Sisymbrium virletii, Fourn. Thése Crucif. p. 62. 
Sour Mexico, valley of the Maiz (Virlet @Aoust). Hb. Paris. 
11. ERYSIMUM. 
Erysimum, Linn. Gen. Plant. n. 814; Benth. et Hook. Gen. Plant. 1. p. 79. 
Upwards of 100 forms have been described as species; but Hooker and Bentham 
express a doubt whether there are more than fifteen or twenty really distinct species. 
They are chiefly natives of the south of Europe, of Central Asia, and North America, 
from the Arctic regions to Mexico. 
1. Erysimum asperum, DC. Syst. ii. p. 505. 
Orrcon and Missourt to—Soura Mexico, Zimapan (Coulter, 688), Chihuahua and 
Sonora (Torrey). Hb. Kew. 
9. Erysimum sp. (£. meaicanum, Fournier, MSS. in Hb. Paris). 
Sour Mzxico, Montezuma near Cuantepec (Bourgeau, 1048). Hb. Paris. 
3. Erysimum macradenium, Gay, Erys. Monogr. p. 8. 
Sour Mexico, crater of the peak of Toluca, 12,000 to 13,000 feet, and Real del 
Monte, 8000 feet (Galeotti, 4660 and 4672); Muxico (Andrieux, 534). Hb. Kew. 
4, Erysimum tilimi, Gay, Erys. Monogr. p. 10. 
Sourn Mexico, around Toluca, where it is called “ Tilimi” (Andrieur, 535), Desierto 
Viejo, valley of Mexico (Bourgeau, 761). Hb. Kew. : : 
