P l a t e CCCXIX.
POLYSIPHONIA CARMICHALLIANA, Harv.
Gen. C h a e . Frond f f l a m e n t o u s , p a r t i a l l y o r g e n e r a l ly a r t i c u l a t e ; j o i n t s
l o n g i t u d i n a l l y s t r i a t e , c o m p o s e d o f n u m e r o u s r a d i a t i n g c e ll s o r t u b e s
d i s p o s e d r o u n d a c e n t r a l c a v i t y . Fructification tw o f o ld , o n d i f f e r e n t
i n d i v i d u a l s : 1 , o v a t e capsules [ceramidia) f u r n i s h e d w i t h a t e rm i n a l
p o r e , a n d c o n t a i n i n g a t u f t o f p e a r - s h a p e d s p o r e s ; 2 , tetraspores
im b e d d e d i n sw oU o n b r a n c h l e t s . P o l y s i p h o n i a (Grev.),— horn
TToXvs, many, a n d aafimv, a tube.
P o l y s i p h o n i a Carmichaeliana ; s t e m i n a r t i c u l a t e , p e r c u r r e n t , f l e x u o u s ,
r i g i d , s e t t h r o u g h o u t w i t h l a t e r a l , a l t e r n a t e , i n a r t i c u l a t e , d i v a r i o a tm g
b r a n c h e s ; r a m u l i s c a t t e r e d , v e r y p a t e n t , i r r e g u l a r l y f o r k e d , a r t i c u l a t e ;
a r t i c u l a t i o n s a s l o n g a s b r o a d , t h r e e - t u b e d .
P o l y s i p h o n ia Carmichaeliana, Ilarv. in Hook. Br. FI. vol. ii. p . 3 2 8 . Harv.
Man. ed. 2 . p . 8 7 .
P o l y s i p h o n i a divaricata^ Carm. MS. {not of Agardh).
U ab . P a r a s i t i c a l o n Desmarestia aculeata. A p p i n , Capt. Carmichael.
V e r y r a r e .
Geogk. D istk . (Not known elsewhere.)
Desor. Filanuads tufted, but not densely so, about four inches high, rigid,
thicker than hog’s bristles ; stem undivided, running through the frond,
bent alternately from side to side in a slightly angular manner inarticulate,
furnished throughout with lateral branches. Branches widely spreading
and divaricating, bent like the stem, and furnished with very patent or
horizontal lesser branches, which in their turn bear numerous scattered
irreo-ularly-forked ramuU, standing at right angles to the hraiich from
whidi thev grow. The whole aspect of the plant is thorny and irregular,
and the substance rigid. The small branches and ra^muh are alone articulated;
their articulations are about as long_as broad, and three-tubed;
and a transverse section shows four large primary siphons with external
secondary cells at the angles. Fruit unknown. Colour a dark brown-red,
changing to black in drying, in which state the plant adheres very imperfectly
to paper.
I here figure a specimen collected by Capt. Carmichael, at
Appin, and now preserved in the rich Herbarium of Sir W. J.
Hooker. No one but Carmichael has met with this plant, to
my knowledge, and he only found it once. Its characters arc
Ke.—V ft Mpi./.s. -Jjq