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CRYPTOGAMIA Alga:.
Gen. Char. M a le , s ca tte red w a r ts .
F em a le , smo o th sh ie ld s o r tu b e rc le s , in w h ic h the
seeds a re im b ed d ed .
Spec. Char. F ro n d s sp re a d in g , le a fy , c a r t ila g in o u s ,
d e e p ly l o b e d ; segm en ts fo rk e d and p in n a tifid ,
fla ttish , s l ig h t ly tw is ted ; y e llow ish g r e e n ab o v e ;
w h ite b en e a th . C u p s from th e u p p e r side, small,
tu rb in a te , m o s tly s im p le . T u b e r c le s m a rg in a l,
red d ish b row n .
S y n . L ic h e n e n d iv ifo liu s . Dicks. Crypt, fasc. 3. 17.
H . Sicc.fasc. 9. 24. Ach. Prodr. 195. With,
v. 4. 60. Hull. 298.
L . p y x id a tu s terrestris, endiviae c r i s p s fo lio , su-
p e rn e e x fla v o e t g la u c o su b v ire scen s, in fe rn e al-
h id u s , p y x id u l is p le rum q u e s im p lic ib u s , r e c e p -
ta c u lis flo rum ru fe s c en t ib u s . Mich. Gen. 82. t. 42.
ĥ 3.
Ba eomy ce s e n d iv ifo liu s . Ach. Metli. 351.
M ic h e l i records his having received this from London;
yet it escaped the mention of British writers, till Mr. Dickson
noticed it, growing on the ground, in heathy barren places in
Surry and Scotland. We are obliged to him for specimens.
No other of this cup-bearing tribe has such ample foliage,
not even ccespititius, t. 1796, whose synonyms Acharius in
his Prodromus confounds with this; but he corrects himself
in his Methodus. The fronds spread in broad patches, and
are rendered conspicuous on black turfy soil by the bright
yellowish green of their upper side, and the pure white of the
back, which in dry weather is turned upwards; otherwise
the segments are flat, or slightly twisted. Their form is
nearly linear, deeply forked and pinnatifid, with wavy edges.
From the upper surface spring the cups, very minute when
young; but such as attain the greatest perfection are near an
inch high, turbinate, with a more or less leafy margin, bearing
small, reddish, almost sessile tubercles.