namolj', the hippoorepiform sori, and as its short sori, which might
appear to connect it with § Allantodia, have not the vaulted indusia
of that group, we leave it among the short-fruited Euasplenitims.
The generic name is a latinized form of the Greek asplenon,
which signifies Spleenwort, and comes from a, privative, and
the spleen. The English name Spleenwort is generally adopted.
SYNOPSIS OF TH E SPECIES.
§ Euasplenium— Sori oblong or linear ; veins simple or forked
and divergent at an obfusish angle from a central costa.
* Fronds hi-tri-pinnate, rarely sub-Upinnate.
f Fronds lanceolate ; sori short, i. e. oblong.
1. A. foEtanum : fronds small (3-8 in.) narrow, linear-lanceolate, "bipinnate ;
rachis smooth, narrowly winged.
2. A. lanceolatum: fronds larger (6-18 in.) broader lanceolate, b ip in n a te ;
rachis minutely scaly, margined in front, n o t winged.
var. microdon: fronds linear, scarcely lanceolate, pinnæ suh-pinnate
or lobed only a t th e base, th e pinnules mostly confluent, wavy.
++ Fronds ovate or deltoid ; sori linear elongate.
3. A. Adiantum-nigrum : fronds bi-tri-pinnate ; segments oblong-wedge-shaped
or sub-trapezoid, shallowly lobed or toothed, te e th acute ; fronds and
pinnæ acute or acuminate.
var. a cu tum ; fronds trip in n a te ; segments narrow-lanceolate, inciso-
pinnatifid, th e lobes linear erect acute ; fronds and pinnæ caudate.
var. obtusatum : fronds bipinnate ; pinnæ b lu n tish ; pinnules ovate, tb e ir
b lu n t apices toothed.
var. microdon : fronds sub-bipinnate, pyramidal or elongate-deltoid ; lower
pinnæ hastate, stalked, th e re s t sub-hastate more or less confluent
; th e upper ones confluent ; sori often scolopendrioid.
** Fronds pinnate, {sub-bipinnate in A . marinum, v. sub-bipinnatum).
t Ffichis winged.
4. A. marinum : fronds coriaceous, pinnate ; pinnæ oblong, truncate-auricled
a t tb e upper, cuneate a t th e lower base, obtuse, crenated or toothed.
var. trapeziforme : pinnæ shorter, less auricled, trapeziform, crenately
toothed, th e lower ones deflexed.
var. incisum; pinnæ small, blunt, unequally inciso-pinnatifid, tb e lobes
obscurely crenate.
var. ramosum : pinnæ obliquely ovate or triangular, th e margin lobate ;
stipites usually two-branched, or united in pairs a t or near th e base.
var. acutum: pinnæ elongate linear-oblong, truncate-auricled,tapered to an
acute point, crenate.
var. assimile; p in n æ e lo n g a te Im e a r -oM o u g , tm n c a t e - a u r i c l e d , n a r r o w e d .
u p w a rd s , w i t h l a r g e , d i s t a n t , to o t h e d lo h e s .
var. sub-bipinnatum ; p i n n æ s u h - p in n a t e a t t h e h a s e , p i n n a t i f id th r o u g h o u t ,
w i t h e lo n g a te s e r r a t e d lo b e s ,
f t Rachis not winged.
Î Rachis ebeneous throughout, bluntly keeled behind.
5. A. T ric h om a n e s : f r o n d s p in n a t e , h e r b a c e o u s ; p in n æ sm a l l , o b lo n g , d e c
id u o u s , e n t i r e o r c r e n a t e , o b l iq u e ly c u n e a t e a t t h e b a s e , a t t a c h e d b y t h e
lo w e r a n g le .
{a) Fronds normal,
var. in c i s um : p in n æ d e e p ly p in n a t i f id , t h e s e g m e n t s in c i s o - s e r r a t e .
var. s u b æ q u a î e : p in n æ o b lo n g , c r e n a t e d o r s in u a t e , n e a r ly e q u a l s id e d ,
a t t a c h e d a t o r n e a r t h e c e n t r e o f t h e i r b a s e .
(J) Fronds abnormal or monstrous,
var. c r i s t a tu m : f r o n d s s y in m e t r i c a lly m u l ti f id - c r i s p e d a t t h e a p e x ; r a c h i s
u n d iv id e d b e low .
var. m u l ti f id um ; r a c h i s h i - t r i - c h o to m o u s ly d iv id e d b e low , t h e a p i c e s o f
t h e b r a n c h e s m u l ti f id - c r i s p e d .
var. ram o s um ; r a c h i s b i - t r i - c h o to m o u s ly d iy id e d b e low , t h e b r a n c h e s f la t
a n d t a p e r i n g t o t b e p o in t .
Î Î Rachis green above, compressed.
6. A. v i r id e ; f r o n d s p in n a t e , h e r b a c e o u s ; p in n æ r o u n d i s h - o v a te o r rh om h o id a l ,
c r e n a t e d , s t a lk e d , p e r s i s t e n t .
§ A c ro p teris.—Son usually elongate ; .veins (in the British
species) flabellately-forked, without a costa.
*_ Fronds bi-pinnate.
7. A. R u t a -m u r a r i a : f r o n d s d e l t o i d ; p i n n u l e s o b o v a t e o r c u n e a t e - r b o m b o id a l ,
t h e a n t e r io r m a r g in e q u a l ly t o o th e d ; in d u s iu m c r e n u l a t e .
var. c u n e a tu m : p i n n u l e s w e d g e - s h a p e d , t h e l a r g e r o n e s th r e e - lo b e d .
var. c r i s t a tu m : a p e x o f t h e f r o n d s a n d p in n æ d i l a t e d a n d c r is p e d .
** Fronds pinnate.
8. A. g e rm a n i c u m ; f r o n d s l i n e a r ( r a r e ly b i p i n n a t e l y d i v i d e d ) ; p i n n æ a l t e r n a t e
n a r r o w o b lo n g w e d g e - s h a p e d , u n e q u a l ly to o t h e d a t t h e a p e x ; in d u s iu m
e n t i r e .
*** Fronds racMform, p in n a tifid ly cleft.
9. A. s e p t e n t r io n a l e : f r o n d s s im p l e o r d iv id e d i n t o 2 -3 r a c h i f o rm s e gm e n t s ,
w h i c h h a v e d i s t a n t l i n e a r m a r g i n a l t e e t h ; in d u s iu m e n t i r e .
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