APPENDIX. 171 
niakia, of a common high northern species, and a peculiar one in 
California ; Echinais, of one or two Asiatic species, one of them 
lately found in California and Colorado, but possibly of recent in- 
troduction ; and Castanopsis, a rather large and characteristic east 
Asian genus, represented by a single but very distinct species in 
Oregon and California. 
Small, under the circumstances, as is the number of cognate plants 
or forms in these two floras, it is large in comparison with those 
which are peculiar to the United States and Europe, excluding, as 
before, all Arctic-alpine species. The following seem to be the 
principal : — 
Anemone nemorosa, of which there is a peculiar Pacific form, per- 
haps reaching the eastern borders of Asia. 
Myosorus minimus, which may be a recently introduced plant. 
Cakile, a maritime genus. 
Saxifraga aizoides. 
Bellis integrifolia, which may be compared with the European 
B. annua. 
Lobelia Dortmanna. — 
Primula Mistassinica. 
Centunculus lanceolatus, a mere form of C. minimus. 
Hottonia inflata, which represents H. palustris. 
Utricularia minor. 
Salicornia Virginica, the S. mucronata of Bigelow and probably 
of Lagasea also. 
Corema Conradi, representing the Portuguese C. alba. 
Vallisneria spiralis, which appears to be absent from northern 
Asia. 
Spiranthes Romanzoviana, with its single station on the Irish 
coast. It extends across the American continent well northward, 
but seemingly not into the adjacent parts of Asia. 
Eriocaulon septangulare, restricted in the Old World to a few 
stations on west British coasts. 
Carex extensa, C. flacca (or Barrattii), and one or two others. 
Cinna arundinacea, var. pendula. 
Leersia oryzoides. 
Spartina stricta and S. juncea. ; 
Equisetum Telmateia. 
Lycopodium inundatum. 
Calluna vulgaris, which holds as small and precarious a tenure 
on this continent as Spiranthes Romanzoviana does in Europe. 
