9 * [ 1940 ]
' CRYPTOGAMIA Algce.
Gen. Char. Male, scattered warts.
Female, smooth shields or tubercles, in which the
seeds are imbedded.
Spec. Char. Crust indeterminate, greenish ash-colour,
formed of tessellated crowded warts. Shields immersed
in the raised centre of each wart, nearly
flat, brownish, with an undivided, elevated, pale,
powdery margin, of the substance of>the crust.
Syn. Lichen Hoffmanni. Ach. Prod. 3 1 .
L. rupicola. Hoffm. Emm. 23. t. 6. f . 3 .
Verrucaria contorta. Hoffm. PI. Lich. v. 1. 9 7 - t. 22.
ƒ. 1—4 .
Urceolaria Hoffmanni. Ach. Meth. 145. Winch
Guide, v. 2. 4 8 .
F o u n d on ro c k s , stones and wa lls in m an y p lace s. W e
h a v e it from W a le s , Y o rk sh ir e , S u s se x and S u ffo lk . I t varies
m u ch a c co rd in g to its different periods o f g row th , hence a
v e ry able bo tan is t has ju d g e d it one state o f L . crenulatus,
v. 13. t. 930, wh ich i f true m igh t ju s t ly b r in g u p on u s the
c ensure o f our less learned readers fo r m a k in g too man y
sp e c ie s , fo r we believe these are as dis tin c t as mo st o f the
p lan ts described in our nume rous vo lum e s.
T h is Lichen is related to ageleeus, t. 1730, and -jibrosvs,
t. 1732. - Its crust in a yo u n g state i s 'o f a pale g re y ish green,
and con sis ts o f nume rous an gu la r crowded smo oth p o rtion s,
p a le r at their edg e s, raised in their cen tre , where is lodged
one', o c c a s io n a lly 2 or 3, sfhall immersed gre y s lig h tly c o n c
a v e sh ie lds , with a con sp icu ou s elevated wh itish powdery
bo rd e r o f the substance o f the c ru s t, w h ich border sometimes
fo rm s a s ligh tly spiral lin e . T h e aggregate c ru st has a p lain ,
n o t fibrous, ed g in g . B y age it g row s w h ite r, the portions
mo re tum id , and the shie lds brown o r b la ck ish and ne arly
fla t. W e have it o v e r ru n n in g loose pebbles on all sides in a
dispersed man ne r.