TAB. XXVI. 



ASPIDIUM SINGAPORIANUM 



FILICES. — Gyratje. Br. 



Polypodiacete. Kaulf. Filices verae. Willd 



Gen. C 



ASPIDIUM. B 



HYPOPELTIS. Mich 



Sori rotundi, dorsales. Involucr 

 undique liberum. Br. 



ASPIDII species, Sw., Willd 



- 



orbiculare, peltatum, stipitatum, in medio 



insertum 



Aspidium Singaporianum ; fronde simplici stipitata late lanceolata acuminata integerrima, basi 



decurrente, soris in venis ternariis, capsulis longe pedicellatis. 

 Aspidium Singaporianum. JVallich MSS. 

 Hab. In insula, Singapore dicta. Wallich. 



Caudex repens, sublignosus, hic illic radiculosus. 



Stipes erectus, 4 — 8-pollicaris, teres, glaber, nigro-fuscus, hinc sulcatus, inferne subsquamosus. 



Frons octo uncias longa, late lanceolata, submembranacea, utrinque glabra, margine omnino integerrima, apice 



acuminata, basi decurrens, costata, venisque lateralibus rectis subobliq 

 venulis fructiferis reticulatae, ortae sunt. 



Ex his 



Sori numerosi, fusci, venis ternariis siti, parvi. 



Involucrum exacte orbiculare, medio depressum, membranaceum, peltatum, vix stipitatum, demum, marginibus 



solutis, subrecurvis, undulatis. 



■ 



Capsulce sphaerico-compressae, annulo integro cinctae, reticulatae, longe pedicellatae. 

 Semina subsphaerica, reticulata, limbo subpellucido marginata. 



Fig. 1. Portio frondis, cum soris. f. 2. Sorus vix maturus. f. 3. Sorus maturus. f. 4. Ejusdem sectio. 



f. 5. 5. Capsulae. f. 6. Semina. 



In the character we have here given of Aspidium, we have in view the adopting Michaux's and 



« 



Mr. Browns idea of separating the old Aspidium of Swartz into three genera, Aspidium, Nephro- 



dium, and Athyrium. We have not yet ourselves had suffi 



experience to determine how far 



their characters are well defined ; but feeling the necessity of grouping into something more than 



divisional characters the overgrown genus Aspidium, we willingly follow such able botanist 



as 



those now quoted. 



Of the original Aspidia, three only are described by Willdenow with " undivided fronds ;" and they 



have all an articulated or jointed stip 



There is a fourth species with a stipes destitute of joint 



given in the Exotic Flora, Asp. TVallichii, Hook. : but that would be a Nephrodium of Brown, and 

 has the sori confined to a line on each side the midrib ; whereas here the fructifications are very 

 numerous, arising, as in some Polypodia, from the ultimate divisions of the veins : and indeed the 

 whole plant has much the appearance of a Polypodium. 



We are indebted for our specimens to our liberal friend Dr. Wallich. 



