320 RADULA. 
divergens, basi apiceque rotundatus; cellule minutule, ambitu 
late opacze, pariete ad angulos parum incrassato. 
Flores dioici: 2 seepius dichotomiales. Bracteze foliis vequales, suberectee, 
plica concava, lobis oblique oblongis, inferiore vix duplo breviore. 
Pistillidia pauca (5). 
Species distinctissima cujus flores invenire non potul. 
6. RADULA PUSILLA Spruce. 
Hab. ad radices Andium Quitensium juxta fl. Bombonasa, in cortice. 
F °85 x °6 (x ‘8 ab usa bast), lobulus °35 x 25; ¢ Ay; per 24x -9™™, 
Pusilla pallide viridis, strato tenui effusa. Caules pollicares subsimplices, 
apice florifero trifidi, sc. Imnovationes duas breves oppositas sub 
flore 2 proferentes; ceeteri rami (quando adsint) seepe florem @, 
cum innovatione unilaterali, gerentes. 
Folia subimbricata, basi ultra 4 alt. acute complicata, carinaé recta 
angulo 45° ascendentia, dein angulo 90° fere & caule divergentia ; 
lobus oblongo-rotundus; lobulus plus duplo brevior trapezoideus 
subacutus, cauli alte adnatus, margine interno cum carina angulum 
rectum formante; cellule parvee subsequilateree opacee prominule 
(unde folia celluloso-crenulata evadunt). 
Flores dioici: 9 terminales, innovatione suffulti; bracteze suberectie, 
foluis subzequales, lobulo paulo majore rotundato. 
Perianthia tubseformia (juniora subintundibuliformia) subincurva com- 
pressa, ore lato 6—7-crenulato. 
R. tenella Gottsche (Mex Leverm. p. 149, ad pedem), insula Trinidad 
a Criiger lecta, differt foliis ovatis, lobulis quadratis. 
7. RapuLA FLACCIDA Ldng. et G. ? 
Syn. Hep. 726 ; Gottsche, Mex. Leverm. 148 ?—Radula folvicola 
Spruce Mst. 
Hab. in sylva Amazonica ubique ad arborum folia viva, interdum ad 
herbas nobiliores (Marante, Caladii, &c. species), necnon in 
filicibus. In Andibus infra 600™ alt. desinit. : 
F 75x ‘65, °75x ‘75, 8x10, lob 2-3, ¢ Ay; br 6-7; per 2Cx'5, 
5°5 x “6mm, 
Tenella, viridis, strato simplice matrici arcte adrepens. Caules $-1 
poll. longi, pinnatim ramosi, ¢ cum @ spe intertexti. 
Folia subimbricata, plana, in sieco plerumque recurvo-assurgentia, late 
oblique ovato-oblonga rotundata, subtruneata, vel subretusa, basi 
antica subsemicordata, postica decurrentia, latitudine in infima basi 
longitudinem interdum superante, ad 4 altitudinis subrecte com- 
plicata ; lobulus subtriplo brevior, rhombeus, subplanus, ad mam- 
millam radicelliferam (plicee contiguam) convexus, raro conico- 
prominulus, apice acutus obtususve, subinde elongatus et suba- 
cuminatus ; cellule subopace, medize parvee, submarginales fere 
minute. 
Flores dioici: @ terminales, innovationibus duabus oppositis, raro una 
sola, suffulti. Bracteze 2, foliis breviores, multo angustiores, erecta, 
lobis rhomboideo-ligulatis, antico apice rotundato, postico $ breviore 
seeplus acuto. 
Perianthia bracteas 3—-4-plo superantia, anguste tubeeformia vel clavata, 
inferne fere teretia, superne compressula, ore subbilabiata 4—crenata ; 
