TAB. CV 



DAVALLIA EMERSONI 



FILICES.— GvRATiE. Br. 



Polypodiace^. Kaulf. Filices verse. Willd., Spreng 



Gen. Char. DAVALLIA, Sm. Sori subrotundi (vel in lineola verticali) margini plerumque 



approximati. Involucrum superficiarum, ex apice vense unica? ortum, lateribus vel lata basi ad- 

 natum, exterius et verticaliter liberum. Br. 





Davalli a Emersom ; fronde parce pilosa simplici pinnatifida, segmentis oblongis obtusis integer- 



rimis, soris in apicem loborum. 



- 



Hab. In Zeylona. Emerson, M.D. 



Radix fibrosus, fibris ramosis, nigris, pilosis. 



* 



Frondes aggregatae, pedales, subcoriaceae, lanceolatae, sessiles, simplices, superficie margineque remote pilosis, pilis 



brevibus rigidis, atro-fuscis, basi apiceque attenuatae et integerrimae, reliquae pinnatifidae, pinnatim ramosaa, 

 laciniis oblongis obtusis, integerrimis. 



Involucra oblongo-cucullata, coriacea, extus dehiscentia. 



Capsula? subduodecim in singulo soro, pedicellatae, pedicellis longitudine involucri, et in ejus fundo 

 Semina sphaerica, reticulata, flavo-fusca. 

 Fig. 1. Lacinia frondis superne visa. 



f. 2. Portio frondis, cum soris. f. 3. Portio 



epidermide in partem sublata, ut venae capsularum in conspectum 

 magn. auct. 



f. 4. Capsulae 



f. 



fructificant 

 '). Semina: 



This very 



species of Davallia is evidently allied to the D. pectinata of Smith, and the 



D. contigua of Hedwig, as far as can be judged from the very imperfect account we have of the 

 latter ; both being natives of the islands of the Pacific Ocean, and both differing from ours in the 

 shape and structure of the laciniae of the frond. 



The 





only specimens we have were gathered by Dr. Emerson in Ceylon ; an island which, were 

 it properly investigated, would perhaps yield as abundant a harvest of interesting Ferns as any spot 



* 



of the like extent on the surface of the globe. 



