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» Tab im i.
JU N G E RM A N N IA EM A R G IN A T A .
(TAB. X X V II.)
J u n g e rm a n n ia , caule erecto, ram o so : foUis bifariis, laxè imbricatis, p a ten tib u s, obcordatis,
em a rg in a tis: fi-uctu te rm in a li; calycibus ovatis, p e richætio iinmerais.
Jungermannia emarginata. E h r h a r t , Beitr. Band. i i i . p . 80. S c h r a d e r , Samml. i i . p . 4 .
S c h r a d e r , Spic. Fl. Germ. p . 75. H o f fm a n n , Germ, i i . p . 8 2 . R o th , Germ, i i i . p . 3 6 7 .
E n g l Bot. t. 1 0 2 2 ; L in n . S y st. N at. ed. Gmel. i i . p . 1 3 4 8 .
Jungermannia macrorhiza. D ic k s o n , Crypt. Fasc. i i . p . 16 . t. 5 . / . 10 . L in n . Syst. Nat.
ed. Gmel. ii . p . 1 3 4 9 . W it h . h i . p . 8 5 4 .
H ab. Plen tifu l in th e alpine distric ts o f E ngland, Scotland, and Ireland, de lig h tin g in
very w e t pla c e s; even in th e wa te rs o f rapid to rre n ts , an d in situa tions where it is
continua lly exposed to th e spray o f a
water-fali. I t bears fructification in th e early
months o f summer.
P la n t grow in g in la rg e patches, more o r less densely crowded.
Roots proceeding almost entire ly from th e lower and leafless p a rt o f th e stems, fiom ha lf
to th re e -q u a rte rs o f a n inch lo n g , nearly as th ick as h um an ha ir, rig id , o ften branclicd.
Stems from one to thre e , o r even four inches long, filiform, or increasing somewhat in
size towards th e extrem ity , e re c t, sometimes simple, b u t more frequently once o r twice
bifid, with segments o f u n c e rta in len g th , and, besides, producing innovations, which are
e ith e r la te ra l, o r o rig in a te , in clustera o f th re e o r four, from th e bosom o f th e te rm in a l
leaves : th e ir texture is somewhat ligneous; when dry, very b rittle .
Leaves from a q u a rte r to ha lf a line lo n g , a t th e base of th e p la n t almost always much
decayed, b u t more perfect, an d o f a la rg e r size, towards th e c en tre o f th e s tem : they are
bifarious and distichous, loosely imbricated, p a te n t o r e re c to -p a ten t, nearly o bcordate (f.5 ),
semiamplexicaul a t th e ir b a se ; th e la te ra l ma rgins, especially th a t p a rt o f them which
is n e a re st th e stem, m uch incurved, th e apex divided, by a ra th e r deep and a cute
notch, in to two very obtuse rounded segm en ts: th e ieaiure ra th e r firm ; th e cei/ales
extremely m in u te , ro u n d ish : th e co/or exceedingly variable in different s itu a tio n s ; m
less moist, b u t m o re exposed places, i t is generally o f a deep brownish p urple h u e ;
when found in rivule ts, as Dr. Smith weU observes, it loses its p urple tin ts a n d becomes
d a rk green.