LEJEUNEA, 63 
whether the British Isles may be its original home, or rather some spot 
in the torrid zone:—a question into which I have not here space to enter, 
and J must relegate to a separate memoir the results arrived at by col- 
lating the parallel instances of a great many other species of plants. 
III. LEJEUNEA, Libert. 
Ann. gén. se. phys. (1820); Dumort. Comm. bot. p. 111; G. L. 
et N. Syn. Hep. p. 308, ex p.—Bryopteris Nees.—Thysananthus 
Lindenb.—Ptychanthus Nees.—Phragmicoma Dum.—Omphalan- 
thus Lindenb. et N.—Frullanic sp. Nees. et Mont.—Jungermaniv 
sp. auctorum. 
Plante plereeque tenere, pusilla, alize preminut, pauce robusta; 
pro more tenui strato repentes, ali species autem stratificatee, alia 
cxspitose et assurgentes penduleve, colore in plurimis pallido, 
albescente vel flavo-viridulo, interdum autem badio luridove, rarius 
letevirente, vix unquam rubescente. Cawles teretes, tenuiculi, 
rarius sat validi, pinnatim ramosi, raro plumeformes, aliquando ex 
parte (raro ubique) dichotomi, rami omnes infra-axillares, sc. foliorum 
basi externa contigui. olia alterna complicato-biloba, ad plice 
basin inferius decurrentia, deinde sursum incurrentia; lobi sat lati 
vel angusti, anticus major, incubus, ad lineam diagonalem vel fere 
tectam—rarissime subtransversalem—super caulem incurrens, posti- 
cus (/.e., lobulus) simili modo insertus, incurvus et ventricosus, 
raro planus, margine valde vario, integerrimo, plus minus serrulato 
denticulatove, interdum dentato-spinoso-ciliatove, rarissime laciniato, 
superficie levissima, vel e cellulis convexis papulosa, interdum muti- 
culata, raro echinata. Cellule in plerisque subeequilaterze, mediocres 
parvuleve, aliquando minute, pro m. leptodermes, trigonis angu- 
laribus raro conspicuis; in paucis speciebus ¢c. majores, ceteris 
parvis interposite, in ocellum subbasalem, raro in lineam mediam 
aggregate, in paucissimis per totam paginem equaliter sparse. 
Foliola in omnibus fere preesentia, in. perpaucis nulla, in divisione 
priore (Holostipe nob.) integra, in posteriore (Schizostipee nob.) 
bitida, magnitudine formaque in diversis speciebus valde varia, 
radicellas pallidas fastigiatas, raro stellatas, a tergo proferentia vel 
ealva. lores dioici vel monoici (rarissime paroici), Andrecia 
plerumque ramulis amentiformibus pallidis constantia, haud raro 
tamen in caule ramove posita, foliis normalibus consecutiva ; bractee 
