i
Osmundaceæ.
TAB. XXVIII.
L Y G O D IÜ M . Sw.
U g e n a . Cav. H y d b o g lo s s u m . WUU. C t e i s iu m . Mich.
Sporangia sessilia vel brevissime stipitata, ovata, reticulata, resupinata, apice radia tim
s triata, medio inserta ; in spiculis (simplicibus e margine pinnæ v. dichotomis in
fronde mutata) dorsalia, biseriata. Indusium : Squamoe capsulas distinguentes, e
venis spiculæ ovatæ, supra lib e ræ .-S tip e s volubilis. Frondes conjugatæ, divisæ
V. composite. Br.
Lygodium volubile.
Of this very distinct genus, admirably characterized by Mr Brown, twenty-eight species
are taken up by Sprengel ; but there is good reason to believe that many of these are mere
varieties. They are chiefly of tropical origin, both in the new and old world ; one species,
L . palmalum, however, extendingTo the parallel of 41° in N. America.
Fig. 1. Small portion of a frond, under side ; magn. 8 i a m . - f . 2. Fertile segment from the same, under
side 1 m. 20 d i am .- / . S.j.Opper side of the same ; d o . - f . 4. The same, under side ; the scales or
mdusia being removed, to show the singular insertion of the sporangia ; do.—f . S. Sporangia in different
stages ; m. SO diam.—/ e. Sporules’; m. 200 diam.
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