Muscr Exortici.—Menziesiant. 
JUNGERMANNIA LAMELLATA. 
Jungermannia caule erecto diviso, foliis dense bifariam 
imbricatis horizontalibus equaliter bilobis, lobis ova- 
tis conduplicatis dorso lamellatis, lamellis spinoso- 
dentatis apice inciso-pinnatis, pinnis denticulatis, sti- 
pulis bilobis spinoso-dentatis. (Tas. XLIX.) 
Has. Staten Land, prope Terra del Fuego, America meridionali. 
D. Menzies, 1787. 
Caulis erectus, digitalis et ultra, simplex vel subdichotome di- 
visus. Folia magna, arcte bifariam imbricata, horizontalia, 
fusco-viridia, areolis parvis rotundatis reticulata, equaliter bi- 
loba, lobis oblongo-ovatis, conduplicatis, appressis, verticali- 
bus, dorso lamellato, lamellis 8 vel 10 longitudinaliter affixis, 
spinoso-dentatis, apice margine pi incisis, seg tis d 
ticulatis. Stipule majuscule in duos lobos ovatos spinoso- 
dentatos divise, infra stipulas squamule parve simplices vel 
divise reperiuntur. Fructus non vidi. 
t mersis 
GuLvensisva 
If the structure of the leaves of Jungermannia appendiculata 
and J, Thouarsii, already figured in this work, excites our atten- 
tion as differing most remarkably from what we have hitherto 
known of the genus, those who take delight in beholding the 
varying hand of Nature in her minutest productions will be no 
less gratified by the examination of the present species. In those 
just mentioned we perceive a lesser lobe or division of the leaf, 
arising from the surface or disk of the larger portion ; but here, 
from the exterior surface of two distinct lobes, are lamelle or 
plates, totally unlike any thing I am acquainted within vegeta- 
ble ceconomy, running nearly the whole length of the lobes, and 
distinctly toothed. The extremities of the leaves are cut into 
lobules, or rather pinnules, as in J. appendiculata. Beneath 
the stipules are tufts of small scales, as there are likewise oe an- 
other Menziesian Jungermannia, which I shall have occasion to 
publish, 
Fig. 1, plant nat. size. Fig. 2, leaf andstipule. Fig. 3, leaf 
expanded. F —magn, 
= 
ig. 4, apex of a lobe. 
