PLAGIOCHILA. 495 
Caudex repens ramosus, caules liberos 1-2-pollicares tenues aqualiter 
foliosos, laxe stratificatos, seepe iteratim acute prolifero-dichotomos 
proferens. 
Folia pallide viridia imbricata patula, longe semicordato-ovata, subscal- 
pelliformia, auricula subrecurvo-cristata, margine antico recurvulo 
subdecurrente apicem versus bispinosa, postico ad ipsa basi apiceque 
(subobtuso) argute spinoso-dentata, dentibus omnibus sub 20, rectis 
hamatisve, apicalibus majoribus ; cellule mediocres suboblongz 
zuttulatee. 
Foliola nulla. 
Flores 2 dichotomiales. Bracteze 1-2-juge, foliis multo majores et 
magis profunde incisee, laxiusculz. 
Perianthia (vix matura) immersa, campanulata, turgida, ore oblique 
truncato crebre laciniato-dentata perpaulo compressa, hine late alata, 
ala apice spinulosa. 
Obs. A very pretty, delicate species, with somewhat of the habit of a 
pale form of Pl. dichotoma ; but in the scalpelliform leaves, with a sub- 
eristate auricle at the semicordate base, showing more approach to Pl. 
hypnoides and cristata; in reality distinct from all, and intermediate 
between the cristate and spinulose groups. The innovations arise usually 
from the very base of the perianth—more rarely from the axil of the 
le bracts ; and sometimes there is a pair on each side, making four 
in all. 
60. PLAGIOCHILA RHIZOPHILA, Spruce. 
Hab. ad arborum radices juxta fluvium Pastasa, alt. 1400™, in Andibus 
Quitensibus. 
F3-0x1°75, 22x15; ¢ hy™™, 
Caules elati, 4-pollicares, erecti, basi sola exfoliati, bis—quaterve dicho- 
tomi, ramis fastigiatis subparallelis apice sepe incurvis. 
Folia flavo-viridia confertissima, distiche patula vel recurvo-secunda 
semicordato-ovata obtusa, margine antico revoluto distanter denticu- 
lata basi longe oblique decurrentia, postico (auricula semilunari 
integerrima excepta) denticulata, hand crispa, apice subspinulosa, 
dentibus omnibus sub 20, parvis ; cellule parvule equilaterze pellu- 
cide. Foliola nulla. Flores non habui. 
Pl. Guilleminiana Mont.; Lindenb. Sp. Hep. t. 33; G. L. et N. Syn. 
Hep. 45 ; nostre subaflinis, caules habet breviores, ramis minus fasti- 
giatis ; folia haud conferta, basi minus decurrentia, margine nisi apicem 
versus subintegerrima. 
61. PLAGIOCHILA DIsTICHA, Lehm. et Lind. 
Hab. S. Gabriel da cochoetra, ad rupes inundatas. ‘Guiana et Sierra 
Leone” (Syn. Hep.) 
F 25x11, 20x10: ¢ fy-ps™™. 
Luride flavo-viridis in plagas latas prostrata ; caules 3-pollicares aqui- 
foliati, parum dichotomi vel fere simplices. 
Folia angulo subacuto patentia parum imbricata—siccando ad speciem 
dissita—semicordato-ovato-ligulata subfalcata apice oblique truncata 
dentataque, margine postico toto distanter denticulata, antico 
longiuscule decurrente basi recurvulo integerrima, dentibus omnibus 
sub 10, ad auriculam parvam subappressam ciliiformibus perpaucis 
