29 
JAMESONIA NIVEA KRST. 
Cryptogamia Filices L. TAB. CXV. Filices L. Juss. 
Polypodiaceae Mett. 
JaAwEsoNiA Hoox. gr Gakw. 
Character differentialis. 
J. foliis lana straminea, stuppea, persistente involutis: ; petiolo brevissimo, flexuoso, lana ferruginea tecto; segmen- 
tis brevissime stipitatis, imbricatis, cordato- -reniformibus; marginis reduplieati ora anguste membranacea, integerrima; Spo- 
rangiorum annulo 22 gyroso, stomate 10gyroso. 
Character naturalis. 
 Rhizoma adscendens filiforme, petiolis vix crassius, atropurpureum, pilis adpressis fuscis vestitum. Folia exarticulata, 
verticalia, linearia, basi sensim angustata, apice circinnatim involuta, pinnatisecta, lana albide straminea, stuppea, ex pilis longis- 
simis, articulatis, subfarctis, persistentibus composita involuta, 0.2— 0.95 metr. longa, 0.007 metr. lata; petiolus brevissimus, 
flexuosus, lana ferruginea tectus; segmenta in anteriorem costae dorso lana densa staminea vestitae faciem incumbentia, densissime 
bifariam deorsum imbricata, subhorizontalia, brevissime stipitata, cordato - reniformia, 0.003 metr. lata, 0.002 metr. longa, juniora 
utrinque dense lanata, adulta supra calva, nervis furcatis, impressis, marginis reduplicati, ora anguste membranacea, stipite piloso. 
5p orangia costae nervisque primariis basi imposita, exiudusiata, ovalia, stipite ipsis breviore, ex cellis triserialibus composito in- 
sidentia, annulo vertieali (subobliquo), incompleto, 92gyroso, stomate lOgyroso instructa, horizontaliter dehiscentia. Sporae 
olivaceae, subglobosae, ligula tetraédri angulis correspondente tectae. | 
Habitat montes altas Meridenses Venezuelae prope Jaji vieum altitudine 3000 metr. 
Species ates: JAMESONIA ROBUS TA KRST. (TAB. CXV) 
Character differentialis. 
J. foliis superne uti rachis ferrugineo -lanatis ; segmentis densissime imbricatis, suborbiculato- cordatis, brevissime stipi- 
tatis, latere superiore (posteriore) repandis; marginis reduplicati Ora membranacea, dentata, subtus glandulis minutis stipitatis 
et tomento ferrugineo obtectis; stipite brevi, glabro; sporangiorum annulo 90— 32 gyroso, stomate lOgyroso. 
Character naturalis. 
Folia verticalia exarticulata, linearia, basi sensim angustata, apice circinnatim involuta, pinnatisecta, lana fe ap ex pilis 
Ee artieulatis, tubulosis, denique partim deciduis composita, tecta; 0.9 — 50:95 metis longa, 0.01 metr. lata; segmenta in 
anteriorem costae atrorufae lana densa denique cinerascente vestitae, faciem ineumbentia, densissime bifariam deorsum imbrieata, 
subhorizontalia, 0.005 metr. lata paulloque minus longa, infima minora, subdistantia, brevissime stipitata, suborbieulato- cordata, 
latere superiore repanda; nervis furcatis, impressis; marginis reduplieati ora membranacea, dentata, supra calva, subtus glandulis 
minutis brevissime stipitatis et tomento ferrugineo obtecta; stpite brevi denique glabro. Sporangia costae nervisque primariis 
basi imposita, exindusiata, ovalia, stipite ipsis breviore, ex cellis triserialibus composito insidentia, annulo verticali (subobliquo), 
incompleto, 30gyroso, stomate 10gyroso, horizontaliter dehiscentia. Sporae Speciei antecedenti aequales. 
Habitat in Cordillerae Bogotensis locis graminosis altitudine 2800 metr. 
Species tet: JAMESONIA BOGOTENSIS KRST. (TAB. CXV.) 
Oharaeter differentialis. 
J. folis junioribus lana cinnamomea denique cinerascente obtectis ; segmentis densissime imbricatis, ovato - cordatis, brevis- 
sime stipitatis; stipite piloso, marginis recurvati ora membranacea pilosa, crenata, reduplicata, supra calva, subtus cinnamomeo- 
tomentosa; sporangiorum annulo 18— 20gyroso, stomate 9 gyroso. 
Oharaeter naturalis. 
Rhizoma repens, horizontale, pennae columbinae crassitudine, ferrugineo-pilosum, Folia Sparsa, verticalia, exarticulata, 
pinnatisecta, linearia, basi sensim angustata, apice circinnatim involuta, lana cinnamomea, denique cinerascente, ex pilis longissimis, 
