M u s e i E x o t i c i .—Swartzìani.
JUNGERMANNIA SERRULATA.
Jungermannia caule erecto dichotomo, foliis disticliis
V. secundis subrotundis subconduplicatis spinuloso-
dentatis apice emarginatis, stipulis magnis rotundatis
convexis spinuloso-dentatis apice emarginatis, calyce
cylindraceo ore dentato. (T ab . LXXXVIII.)
J. serrulata. Swartz Fl. Ind. O c c . S c h i u a e g r .
Hist. Musc. Hep. Prodr. p. 19.
J. Aubertii. Schwaegr. Hist. Muse. Hep. Prodr.-p. 19.
Hab. In subliuniidis umbrosis montium altissimorum Jamaicæ.
Sw a rtz. In Insula Franciæ. D , Auhert du Petit Thouars.
Caulis bipollicaris, erectus, flexuosus, dichotome ramosus. Folia
bifariam inserta, horizontalia, disticha, raro secunda, flavo-
lutescentia, horizontalia, concava, atque lateribus incurvis ut
fere conduplicata, subrotunda, subundulatis, marginibus spinuloso
dentatis, dentibus distantibus inæqualibus, apice einar-
ginatis ; sulstantia compacta, reticuli areolis minutis ro-
tuiidatis. Stipuloe foliis duplo minores, rotundatæ, convexæ,
spinoso-dentatæ,apice emarginatæ. Ferichætialia reliquis similia,
sed marginibus ciliato-spinosis. Calyx terminalis oblongus,
cylindraceus, apice parum plicatus, ore lacerato, laciniis
denticulatis.
Schwaegrichen bas described the leaves of this Jungermannia
as quadrifid, though in my specimens they are usually emargi-
nate ; but it often happens that near the apices of the segments
there arise tooth-like processes so large that the extremity may
be considered tri- or quadrifid, or more properly, perhaps, trior
quadri-dentate. Oi J .A u le r lii Schwaegr. I havereceived specimens
from Du Petit Thouars himself, and have no hesitation
in saying it is the same as Swartz’s J . serrulata, having the leaves,
however, somewhat less toothed.
Fig- X, ], plants, nat. size. Fig, 2, portion of a stem and
leaves, superior side. Fig. 3, ditto, inferior side. Fig. 4, 5,
leaves. Fig. 6, stipule. Fig. 7. perichætial leaf. Fig. 8, calyx.—
magn.