267 
Nasturtium hispidum (Desv.) DC. Syst. ii. 201 (1821). 
Brachylobus hispidus, Desv. Journ. Bot. iii. 183 (1814). 
Nasturtium palustre, var. hispidum, A. Gray, Man. Ed. 5 
(1867.) : 
I am satisfied that this is a distinct species from the European 
NV. palustre, and in this conclusion I am strengthened by the 
opinions of such close observers as Mr. Bicknell and Professor 
Macoun. The plant is apparently strictly East American in 
distribution, and is one of the commonest Crucifers in our territory. 
NV. palustre is rarely met with and occurs only in situations where 
it has been introduced. It can readily be distinguished from JV. 
hispidum by its linear pods which are 4-6 times as long as thick, 
and by the nearly entire absence of pubescence on the stem and 
branches, WV. hispidum having globose-ovoid pods, and usually 
considerable hirsute pubescence. 
The status of the Northwestern and Rocky Mountain plant 
which has also been referred to NV. palustre is more uncertain. 
It is commonly larger than European /adustre, has, I believe, 
larger flowers and still longer pods. Professor Macoun is inclined 
to consider it a distinct species, but the specimens at my com- 
mand do not convince me of the correctness of this view. It is 
certainly closer to palustre than hispidum is, and sharesthe pecu- 
larity of many Rocky Mountain species in more nearly resembling 
European plants than do those of the eastern half of the conti- 
nent. 
- Arabis lyrata, L. Sp. Pl. 685 (1753). 
Cardamine spathulata, Michx. Fl. Bor. Am. ii.‘ 29 (1803). 
Under these circumstances it will no longer seem strange that 
Michaux’s species which came from the Southern Alleghenies, 
and of which the type is preserved at Paris, has never since been 
found. : 
Coronopus, Hall. Helv. 1. 217 (1768), fide Baillon, Hist. 
Pl. iii, 286: Geertn. Fruct. et Sem. ii. 293, t. 242 (1791). 
Senebiera, D.C. Mem. Soc. Hist. Nat. Paris, vii. 140, t. 89 
(1799). 
The earliest specific names of the two species occurring in 
North America may be indicated as follows: 
1. Coronopus didymus, (L.), Smith, Fl. Brit. iii. 691 (1800). 
