BROADHURST: STRUTHIOPTERIS IN NortTH AMERICA 369 
theless it is easy to select single plants from these localities which 
will justify the distinctions made by Swartz. Abundant material 
from these localities separates readily according to distribution, 
showing the following differences, mainly relative but sufficient 
to separate them. S. lineata has narrower sterile laminae and 
Narrower, more numerous pinnae, which are more curved, not 
abruptly but gradually acuminate, shining below, and less revolute. 
The scales in S. lineata are more numerous and more persistent; 
they are mixed with finer and shapeless ones, which are more or 
less appressed to the stem; the costae contrast markedly with the 
commonly naked ones of |S. striata, as do the smoother, often 
shining, under surfaces of the pinnae with the finely araneous 
condition of the strongly raised veins on the under surface of S. 
striata. A plant from Santo Domingo (Eggers 2041, ‘“‘monte 
Barrero,”’ altitude 1,100 m.) has very heavy, more numerous 
(58-jugate), narrow, close pinnae with deeply cordate bases; the 
rachis is densely chaffy and also fibrillose, and the scales on the 
costae are numerous, more uniform, and heavier in texture. More 
material might make possible its separation from 5S. lineata. 
Some recent material from Cuba, collected by J. A. Shafer at 
Oriente (no. 4150 and no. 9038), shows plants with very narrow 
fronds, and narrow pinnae which (when fully mature) are heavier 
than any of the S. lineata specimens seen, except the plants men- 
tioned above collected by Eggers. Shafer’s no. 8059, also from 
Oriente, is like S. lineata in the narrow lamina but has short and 
Proportionately broad pinnae (suggesting S. striata, in proportion 
only); as in S, lineata, the margins are subentire to almost sér- 
rate, not revolute, and the veins are not raised below; the scales 
throughout are more like those of striata; the stipes are dark reddish 
brown and the rachises similar. More material from Cuba is most 
desirable; excepting S. Shaferi these are the only Cuban repre- 
Sentatives of the petioled species. 
16. S. rufa (Spreng.) Broadh. comb. nov. 
Lomaria rufa Spreng. Nova Acta 10: 230. 1821; Syst. 4: 
63. 1827, 
Lomaria robusta Fée, Gen. .Fil. 69. 1852. 
Sy terrestrial. Rhizome subarboreous (in Duss 4164, 20 
‘ong and 12 cm. thick), the scales 2.5-3.5 cm. long, linear, 1-2 
