8 
NOTES. 
at Mooroowa, the outer margin or involucre is so extended and doubled back as to give tlie 
appearance of an extension of the frond beyond the line of the sorus, as in Tceniopsis 
Falcata; but even in this case the sorus, though submarginal for the greater part of its 
length, approaches and runs into the margin as it terminates. None of the Ceylon 
specimens seem to conform to the true type of Tceniopsis. 
Acrostichum Conforme, Sw. —Under this species several varieties are comprised. In Ceylon 
there are two types, distinguished in Tliwaites’ ‘Enumeratio’ as A. Laurifolium, Thouars, 
C. P. 1310, and A. Marginatum, Wall., C. P. 1311. The former is now made into a new 
species, under the name A. Commutation, Mettenius, Ann. Mus. Leyd., vol iv., p. 292. 
Specimens of this species, collected on Wattakelly Hill, have the stipes of the barren frond 
winged to the base, and that of the fertile frond much longer. But I am not certain that 
these characters are constant, or that they distinguish the new species. 
Acrostichum Acutum, Fee, MSS., is the plant which has hitherto been known in Ceylon as 
Acrostichum Spathulatum, Bory, of which Mr. Fee makes a new species, and, as Mr. Baker 
adopts his view, the plant appears under its new name in this list. 
Acrostichum Virens, Wall., is very variable, hut the different forms of our Ceylon specimens 
are not considered separable. The form most nearly resembling A. Repandum, of Blume, 
and which Dr. Thwaites refers to that species, is considered to be a form of A. Virens, as 
is also the form A. Hookerianum *of the ‘ Enumeratio,’ though the two certainly appear 
very distinct. The pinme of the latter are much narrower, and their edges are deeply 
sinuated, whereas in the barren fronds of the former the edges are entire. The venation of 
the two forms is also different. In the former, the main veins are straight and fine, and 
the veinlets unite midway between them, rarely forming areolae except in the long, terminal 
proliferous pinna. In the latter, the veins are all very conspicuous, especially the main 
veins, which are undulated, and the veinlets anastomose irregularly, forming copious 
areolae. 
Acrostichum Lanceolatum, Hk.—Dr. Thwaites does not regard our plant as distinct from 
A. Variabile, Hk. It bears a very close resemblance to some of the simple forms of that 
plant, and its venation sometimes approaches nearly to that of Gymnopteris. It is not 
subject, however, to the remarkable variableness of A. Variabile, but remains constant 
to its simple typical form. 
Acrostichum (Chrysodium) Wallii, Baker.—Dr. Thwaites regards this fern as a variety of the 
extremely variable species A. Variabile, hut it differs widely from any specimen of that 
species and its allies in the herbarium at Kew, and has therefore been separated from them. 
It was found in a ravine, near Mooroowakka, in the Southern Province, and has not yet 
been discovered in any other locality. Numerous specimens present very constant and 
marked characters, which seem to distinguish them from all previously recognized species. 
Ophioglossum Vulgatum, L.—We have two allied species of Ophioglossum in Ceylon, one 
resembling the figure of 0. Ellipticum, Hk. and Gr., pi. 40, and included under the species 
0. Nudicaule; the other well represented by Beddome’s figure of 0. Brevipes, which would 
seem to be comprised under 0. Vulgatum. Neither of these plants is typical; hut, as the 
species are very variable, they are probably well classed under the species named. 
