| 
В. OBTUSATA ... 3 
(Adiantellum.) 
VIII. Articulata . 
Amer. trop. 
49—50. 
49. tenerum 
Antillae, Bahama, Mexico, Amer. centr., | 
Venezuela, 
50. fragile . . 
Antillae maj. 
IX. Dentalia 
sp. orbis antiqui el Amer. bor. temp. 
51. Aethiopicum. 
Aethiop. genuinum, 
Pr. Ъ. sp., Natal., M0 Cameroon. 
А, 
ADIANTUM. 13 
nulata, crenis utrinque — 12 limbulis sorif. retusis, 
in ramulo terminali 2 — 4-juga, ramuli sectionum 
secundarii numerosi: 2— 3 superiores (utrinque) 
simpliciter —, subsequentes bi- denique tri-pinnati, 
segmenla prim. infima et proxima deorsum admo- 
dum adaucta, folium sistunt tri- quadri-pinnatum, 
bi- tri-pedale, paleae lanceolatae, integerrimae, pe- 
tiolus longus fasciculos continens tres! 
Lamina et segmenta prim. foliolis terminalibus fronte rotundatis, 
cuneatis 1. orbicularibus, partim auctis; nervi aequaliter flabellati, foliola 
petioluolis ramulisve tenerrimis diffuse disposita. 
4 Foliola petioluolis articulata, decidua (inciso-lobata, soris inter dentes 
| aduncos exeisis, latis, 3—14, limbulis nervillis 5 — 7 saepe mani- 
festis, nervis in dentes exeurrentibus), paleae lineari-lanceolatae, apice 
retrorse ciliatae, faseieuli in imo petiolo 2. 
5 Petiolus laminam subaequans, lamina deltoidea basi plerumque 
quadripinnata, foliola decidua, basi inaequilatera subrhomboi- 
dea (eintima obtusangula) multiloba, incisionibus binis pene- 
trantibus, 507% plus deni. 
ES 
Petiolus laminae multo brevior, lamina pyramidalis segmentis 
fastigiatis, basi plerumque tripinnata, foliola cadueissima, 
cuneato-obovata, parum ineisa, plerumque biloba, lobis obiter 
incisis, sord 4—6, rarissime 8. 
B— 
Foliola, petioluolis in nervos solutis, continua. 
5 Nervi essentialiter dentales (in dentes excurrentes, margine 
| interdum subintegerrimo obsoletos). 
6 Limbuli sorif. cordato-rotundati in sinubus circulatim exci- 
| sis, foliola ineisione prineipali biloba, paleae subintegerrimae, Га- 
sisculus in petiolo solitarius, canalieulatus. 
. 7 Foliola membranacea pleraque suborbicularia leviter in- 
| cisa, sinuose denticulata, limbulis plurimum binis, viridia, 
petioluolis tenerrimis, fuscis, superiora angulo basali 
saepe recto. 
8 Foliola sterilia tenerrima nervis undatim prominulis 
| minute striolata, margine obtuse denticulata, sinubus 
sorif. plurimis apertis, geminatis. 
