4^6 TRANS. ST. I,OUIS ACAD. SCIEXCE. 



N. PALUSTRE, (Leys.) DC. Syst. n. — Sisymbrium palastre, Leys.. 

 Fl. Hal. 1761. 



Wet ground ; common. 



As a synonym of X. paluslre, Watson's Index gives Sisymbrium fn/usire, L,. 

 The New York Catalogue gives Nasturtium palustre, (L.) DC. But I liave been, 

 unable to find Sisymbrium palustre in any of Einna-us' works, so I have followed 

 the sj'nonymy given in DC. Syst. 



N. Armoracia, (L.) Fries. Fl, Scan. 1835.— Cochlearia Armoraeia, 

 L. Spec. 

 Escaped from gardens into wet places. 

 Barbarea vulgaris, R. Br. in Ait. Hort. Kaw. —Uri/simum Bar- 

 barea. L. Spec. 

 Grain fields; infrequent. 

 Hesperis matroualis, L. Spec. 



Occasionallv spontaneous around gardens; a few plants found in the lower part 

 of "The forks." 



Erysimum cheiranthoides, L, Spec. 



Woods; common. 

 Sisymbrium canescens, Nutt. Gen, 



Rocky places, infrequent. 



Along railroad south of Ames, and elsewhere. 



5. pintiatam, (Walt.) Greene, Bull. Calif. Acad, ii., is invalidated by S. pinna- 

 turn, Barneoud in Gay, Fl. Chili. 



S. OFFICINALE. ( L.) Scop. Carti. 2d ed. ii. 1772. — i?/'.ysi?nM;n offici- 

 nale. L. Spec. 



Roadsides and waste places; common. 

 Theeypodium pinnatifidum, (Mich.) Wats, iu King's Eep, v. 

 1871. — Hesperis pitinatifidum. Mich. Fl. 

 Low woods ; frequent. 

 Brassica Sinapistrum, Boiss, Voy. Esp, p, 39, 1839-1815, 

 Fields and waste places; common. 



Specimens with sparsely hirsute pods were collected three miles east of Ames. 



B. alba, (L.) Boiss. Voy. Esp. p. 39. — Sinapis alba, L. Spec. 



a specimen was collected along the railroad, between Ames and the College, bv 

 Mr. Corbett, and it has been reported by others. 



By the accidental omission of the authority in the 5th and 6th editions of the 

 Manual, this would appear to be one of Dr. Gray's species. 



B. nigra, (L.) Koch in Roehl, Deutsch. Fl.Sd ed, iv, \%?>?j.—Si}iapi^ 

 nigra, L. Spec. 



Waste places ; common. 

 Capselea Bursa-pastokis, (L.) Moench, Metb, 1794. — Thlaspi 

 Bursa-pastoris, L, Spec. 



Gardens and waste places ; common. 

 Lepidium Virginicum, L. Spec. 



Woods and waste places; common. 



Plant more leafy, usually less branched, pedicels rather longer and pods some- 

 what larger than in the next; leaves cut-serrate; petals usually present; cotyle- 

 dons accumbent. Prefers shady or moist places. 



