156 
ASPI DIAGEO. 
the vernal ; the clusters also are rarely confluent ; the frond itself 
is more minutely divided. 
The third form, often found on the same plant as the preced- 
ing, is called angmtata. 
Cystea angustata. “Root tufted, or somewhat creeping, 
black, with long fibres and rusty scales. Fronds several, erect, 
twelve or fifteen inches high, of which the slender, blackish, 
smooth, and naked stalk occupies more than a 
third, sometimes nearly half ; the midrib above 
is still more slender, and, like every other part, 
quite smooth, without any membranous bor- 
der. Main wings or leaves bright green, from 
twelve to fifteen pair, of a moderate length, 
nearly opposite, taper-pointed; the lowermost 
rather shorter and more remote from the next 
than those about the middle of each frond ; 
all pinnate, with a scarcely bordered midrib. 
Leaflets about ten at each side, alternate, 
lanceolate, decurrent, rather bluntly pointed, 
sometimes tapering at the extremity; all 
either deeply pinnatifid, with oblong, acute, 
wavy segments ; or, in less luxuriant plants, 
slightly pinnatifid, or only wavy at the mar- 
gin ; the ribs of all more or less wavy. The 
ultimate divisions, in every instance, are ob- 
long or linear, never dilated, rounded, or 
ovate ; they are sometimes, though seldom, 
notched or cloven at the end. By this linear 
or oblong mode of division, and its thinner 
more pliant texture, the present species may 
readily be known from both the preceding, 
with which it has generally been confounded. 
The masses of capsules, much smaller and less 
prominent than in those species, always con- 
tinue distinct, standing either solitary or in 
pairs, towards the bottom of each lobe or tooth, and are round, 
at first pale, subsequently brown.”^ The frond to which Sir J. 
^ Eng. Flar. iv. 288 . 
