TAB. LXXXVir.
P S IL O T U M . Sw .
P s iL O T i s p . B r . E n d lich . B e e n h a r d ia e t H o f e m a n n ia . W illd . T r i s t e c a .
P a lis . L y c o p o d iu m . L in n .
S p o ra n g ia sessilia uniformia globosa triloba, lobis obtusis ad basin follorum minutis-
simorum furcaturæ sita, solitaria, coriacea, trilocularla, trivalvia, loculicldo-dehiscentia.
Vlsatsi p a ra s itio a subtropica. Ca.u\xs p endens v . suherecta a n gulata,
v e l p la n a , in fe rn e n u d a indiv isa, superne dichotomo-ramosissima, ramis angu-
la tis acutis minute foliosis, sporangiferis. Folia a lte rn a (omnia? sp o ra n g ife ra ),
p ro fu n d e b ip a rtita , sporangiis p lu r ìe s minora, laciniis subulatis. Sporulæ
copiosa} reniformes hyalince utrinque depresso}.
Psilotum trìquetrum. Sui. ( T a b . L X X X V I .) Lycopodium nudum. L in n .
There are few better examples of a dichotomous ramification, than that which is afforded
by the present plant. The ultimate branches especially are loaded with fruit, (sporangia,)
which are very large in proportion to the branches which bear them. Each is subtended
by a minute bipartite sessile leaf.
T a b . LXXXVII.— 1 . Upper part of a plant of Psilotum triquetrum with sporangia; f . 2.
Smaller portion of the same: magnified; f . 3. Single branch of do.; / . 4, 5, 6. Sporangia in different
points of view; / . 7. Sporules -.—magnified.
I I
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