HomaAuLo-LEJEUNEA. 137 
ceteris caulinis multo majus, orbiculatum, toto fere margine spinu- 
loso denticulatum. 
Perianthia alte emersa, foliis fere duplo longiora, paleeformia, (a basi brevi 
triangulari rectangularia), fere planissima, postice obscure convexula, 
apice emarginata-truncata rostellata, margine apicem versus nonnun- 
quam obsolete alata, leevissima. 
Andreecia nulla invenire potui. 
A L. robusta, Mitt. differt floribus dioicis; foliis laxe imbricatis, apice 
argute spinosis, lobulo multo minore ; pracipue autem foliolis integer- 
rimis, ipsa basi decurrente biauriculatis, i.e. cordatis. 
Ad Antombos adest forma pallide viridis laxa, foliis plane dissitis apice 
pauciserratis, lobulis minutis interdum subobsoletis ; foliolis hine auri- 
culatis, hinc longe sensim decurrentibus, auricnla nulla. 
Obs. Where the plants cross one another, or an intermixed hepatic or 
moss, the underleaf puts forth at the crossing a many-rayed star of radi- 
cles, each split at the top into about three papilla, which adhere closely 
to the object they overlie; but unless the stems come into contact with 
anything they emit no radicles, although the brownish hilum at the 
middle base of the under leaf is always present, and is doubtless ready to 
exert its root-bearing function whenever required. 
4, HomMaALo-LEJEUNEA Rosusta, Mitt. 
In Hook. Journ. Bot. (1851), 
Hab. In Andibus Peruvianis et Quitensibus, alt. 1200-2500, ad saxa 
arboresque ; Pichincha, in descensu occidentali, ubi primum invenit 
JAMESON, postea ipse legi, et in monte Campana, ad pedem m, Tungu- 
ragua juxta Banos, ete. 
F 1:9x1°5, lob 4, ¢ Ay; f'* 8 (a media basi, 1:1 ab angulo decurrente) 
pete or 1S x 1°05; br 1°8x1-35; per 30-40 x 1°7™™, 
Elata badia stratificata. Caules 3-6-pollicares validi parce dichotomi vel 
brachiatim divisi—steriles interdum pinnati, ramis paucis brevibus 
suboppositis. 
Folia conferta—plus quam dimidio imbricata—szpe ad Mastigobryi instar 
disticho-deflexa, a basi complicata suberecta ad lobuli apicem abrupte 
divergentia, semicordato-ovata, truncata, acuta vel (superiora) apicu- 
lata acuminulatave, margine postico toto fere, antico apicem versus, 
spinuloso-denticulata, basin versus sinuato-complicata ; lobulus 5-plo 
brevior subplanus semi-obparabolicus, margine transverso repando 
vel bidenticulato; cellule majuscule equilateree pellucide, pariete 
tenui. 
Foliola duplo fere breviora late imbricata, late orbiculata, vel cuneato- 
orbiculata, basi brevius longiusve decurrentia ibidemque crispula— 
interdum hine parviauriculata, toto margine (basi excepta) spinuloso- 
denticulata lateque recurva. 
Flores monoici (autoici et paroici): ? terminales, innovationibus duabus 
oppositis suffulti. Bractese foliis caulinis vix breviores ab apice ad 
3 alt. bifidee, lobo oblique lanceolato subacuminato superne subdenti- 
culato, lobulo minuto rhomboideo apiculato; bracteola magna obovato- 
cuneata subtruncata vel late emarginata, margine toto fere argute 
spinulosa; omnes bractes: basi macula magna flavida notate, 
TRANS. BOT. SOC. EDIN, VOL. XV. 8 
