DUMORTIERA. 567 
Var. trichopus 8. Pedunculus tota longitudine setis longis squarrosis 
conspersus. Capitula supra hirsutissima. —Chimborazo, in scopulis 
rivulorum humectatis. 
XLV. AITONIA, Forst. 
Char. gen. pl. 147 (1776). Plagiochasma Lehm. et Lindenb. 
in Pug. pl. IV., 13 (1832); Syn. Hep. 511. 
Frondes humiles prostrate, haud crass, validze tamen, plerumque 
eanaliculate, ex apice emarginato interdum innovantes, vel subtus 
pauciramez ; supra exareolatz, poris nullis vel vix visibilibus notate, 
intus cavernose ; subtus purpurez, paleacez et radicellis longis cum 
ductulis punctatis mixtis villosee. ores dioici vel monoici. Pedun- 
cult 2 antici, pro more breves, striati, solidi, basi apiceque paleis 
angustis plus minus copiosis stipati. Capitulwm parvulum, pro- 
funde 1-4-lobum. Jnvolucra 1-4, capituli lobis adnata, tenuia, 
rima verticali vel valde obliqua in valvulas duas cochleatas abeuntia, 
monocarpa. Perianthium nullum. Calyptra decidua, ipsa basi 
autem nunc involucro nune capsule adherens. Capsula subsessilis, 
globosa, cellulis unistratis exannulatis conflata, vel apice dentibus 
dehiscens vel circumscissa, lateres breviusculi 2-4-spiri. Spore 
sat magne poly-(szepe tetra-)edrae, scrobiculate. “ Andracza in sinu 
apicis vel in media fronde immersa, muricato-papillata.” (Syn. 
Hep.). 
Hab. et Distr. Species sat numerosze in die cognitz locis saxosis 
rupibusque humectatis, rarius in ipsa terra vigent ; terris calidioribus 
magis frequentes, due autem Europam australem habitant, una 
Nove-Zelandiw propria est. In Andibus species 2, ut videtur 
novas, ipse legi. 
1. A. subplana. Frons linearis subplana, ramis hypogenis nullis, paleis 
parvulis uniseriatis. Involucra 1 vel 2, parce paleacea. 
2. A. lanigera. Frons obovato-oblonga canaliculata, subtus ramosa et 
radicellis ductulisque dense lanata, paleis hypogenis magnis bi- 
seriatis. Involucra 2 vel 3 et pedunculus dense paleacea. 
1, AITONIA SUBPLANA, Spruce. 
Hab. In rupibus humidis ad Antombos, juxta fluvium Pastasa, alt. 1800™. 
Frondes 15-20 x 4-5; ¢ 7.45; palee 15x11; ped 10; envol 2:0 ; palew 
inv. ad 2:0; caps 1°6; elat 03; spore am, 
Frondes vix pollicares, subimbricate, fere planissime, raro siccando mar- 
gine subinvolute, lato-lineares, emargiat, interdum furcate, supra 
ex albido glaucescentes, exareolate, minutissime porosee, subtus radi- 
cellosee et paleaceze, in etate tote rubescentes ; ; ad axin cellulas sub 
6 crass, utrinque sensim attenuate, ipso margine pagina tenui uni- 
