more exposed situations. T h e substance is extremely rig id , composed o f distantly-
placed, oblong, opaque cellules, th e interstices o f which ai’e pellucid.
Peiickoetial leaves n um e ro u s , c row d e d , so u n i t e d to g e th e r a t th e ii- b a s e s a s t o c o n s t itu t e
a c om p le te c a ly x : t h e i r a c u m in a te d s e gm e n ts a lo n e a r e f r e e , a n d f o rm a la c in ia te d
m a rg in .
M ale F r u c t if ic a t io n I have never seen.
F em a l e F r u c t if ic a t io n te rm in a l .
Calyx (f. 6 ) a b o u t th r e e - q u a r te r s o f a l in e lo n g , a n o v a te , p lic a t e , t u b u l a r m em b r a n e ,
f o n n e d , a s b e fo r e o b s e rv e d , b y th e u n io n o f s e v e r a l o f th e p e r ic h æ ti a l le a v e s , th e low e r
u n d iv id e d h a b ’cs o f w liic h g r o w so e n t ir e ly jo in e d , t h a t n o s u tu r e i.s v is ib le , w h ile th e
s e g m e n t s , r em a in in g s e p a r a t e , e x h ib it th e a p p e a i'a n c e o f a q u a n ti ty o f e r e c t la n c e o la te
la c in iæ , e x a c tly e q u a l in n u m b e r t o d o u b le th e q u a n t ity o f le av e s c o n n e c te d .
Calyptra o v a te , w liite , s em i - tr a n s p a r e n t , tip p e d w it li a s h o r t b r o w n s ty le , a n d s u r ro
u n d e d a t th e b a s e b y n um e ro u s g r e y is h ahortwe p istilla, w h ic h a r e a lm o s t lin e a r ,
o r s lig h tly in c r a s s a te d to w a rd s th e b a s e .
Peduncle s h o r t , sc a rc e ly tw o lin e s i n le n g th , w h i te , p e llu c id , c e llu lo s e .
Capsule s u b r o tu n d o - o v a te , d a r k b r o w n , d iv id in g in to f o u r e q u a l o v a te v a lv e s .
Seeds and spiral filaments (f. 7 ) o f a d e e p fu lv o u s c o lo r ; th e f o rm e r sp h e ric a l, th e l a t t e r
c om p o s e d o f a d o u b le helix, s lig h tly a t t e n u a t e d a t e a c h e x tr em ity .
J . juniperina has no affinity wliatever w ith any B ritish species, b u t approaches, as well in habit
as in th e te x tu re o f its leaves, to a Ju n g e rm an n ia n o t y e t described, gathe red in New Zealand,
by Mr. Menzies. After a most careful examination o f auth en tic specimens o f Mr. Dickson's
J . adunca, compared w ith othem o f J . junipe rina, which I have received from Dr. Swartz, I
am n o t able to find any characters which can induce me to keep th em separate. T h e la tte r
p la n t is indeed o f a la rg e r size th a n th e former, and possesses one s trik in g peculiarity, wliich
is, th a t, on imme rsing a dry specimen in wa te r, th e absorbent vessels are immediately p u t
in action, and th e remarkable divarication o f th e segments o f th e leaves, noticed by Dr. Swartz,
appeai-s almost a t th e same m om e n t: th e laciniEe o f th e calyx, too, become reflexed. Our
British variety, on th e co n tra iy , recovers extremely slowly in w a te r, and a fte r a n immersion,
even o f l ery long dura tio n , th e segments o f th e leaves still rem a in s tr a it, and those o f th e
calyx e rect. I t b sin g u la r th a t th e only stations o f th b p la n t a t p re s en t known a re th e loftiest
o f th e B ritish Alps and th e blue mountains in Jamaica.
Specimens in fructification o f my var. /3 are o f ra re occurrence. I possess th em only
th ro u g h th e kindness o f Mr. Dickson, who g a the red th em in Scotland. T h e figure and
description o f th e species- in th e Fasc. Plant. Crypt, a re good, except th a t they repre sent i t as
liaving undivided leaves. The peculiar s tn ic tu re o f th e calyx did n o t escape th e observation
o f th e au th o r o f th e Flora Indies Occidentalis, who has accurately described th e Jama ic a variety
in th e following w ords: “ Pe riantliemum e foliolb externis, confertis, b ip a r titb , paten ti-rc flex is;
intirois ere c tis, in d iv b is, ca rina tis, conniventibus, pallidis, rigidis."
I have already, in a paper p rin ted in th e Transactions o f the Linnæan Society, v. x. p . 396,
tak en Üie o p portunity o f rema rking, un d e r th e description o f Andræa nivalis, th e general
resemblance wliich th a t p lan t a t firat sig h t bears to th e pre sent one. T h e ir places o f growth
ai-e tlie same, as are th e ir falcato-secund leaves and th e incurved extremities o f th e branches,
as well as th e color of th e whole p lant. The Andræa, liowever, possesses really entii-e leaves,
wliich are furnished w ith a stro n g nerve.
R E F E R E N C E S T O T H E P L A T E .
1, 1, 1, 1 . Barren plants o f J . junipe rina, natural s
Fertile plant, natural size.
Portion o f the stem and leaves i
Terminal l e a f ....................................
Fructified extremity .................
Calyx ...................................................
Seeds and spiral filaments . . . . . .