262 UNDERWOOD: REVIEW OF THE GENERA OF FERNS 
1800 
Roth (Tent. Fl. Germ. 3:) published (1) Athyrium (58) based 
on seven species,* viz, A. fontanum, A. Hallert, A. molle, A. 
trifidum, A, ovatum, A. filix-foemina, and A. rhaeticum ; and (2) 
Polystichum (69) based on twelve species, viz., P. Lonchitis, P. Phe- 
gopteris, P. montanum, P. Thelypteris, P. aculeatum, P. Dryopteris, 
P. filix-mas, P. cristatum, P. frigosum, P. multiflorum, P. spinosum, 
and P. Marantae. Moore cites for these genera the date 1788 
which is the date of the first volume instead of the third, and 
Pfeiffer cites the date as 1797. The date on the title page is as 
above, but as the genera were quoted by Bernhardi in 1799 a part 
at least of the third volume probably appeared some time before 
the title page ; the preface is dated t4 Sept. 1798. The exact date 
of issue is still a desideratum. 
1800 
Hedwig (Filicum Gen. et Sp. fasc. 2) proposed the name 
Ptychomanes in place of Smith's Hymenophyllum in order to have 
the genera of the family close with a uniform termination!  77z- 
chomanes asplenoides Swz. served as the basis for this establishment. 
1801 
Swartz in his Genera et Species Filicum (Schrader’s Journ. 
1800°:) first elaborated his system. He established : 
I. Grammitis (17) based on G. linearis, G. marginella, G. lan- 
ceolata, G. serrulata, G. graminoides and G. myosuroides. 
2. Aspidium (29) based on A. articulatum, A. pistillare, A. tri. 
foliatum, A. Lonchitis, and some sixty other species among them 
species now included in Asplenium (A. filix-foemina), Filix, and 
Phegopteris. 
3. Diplazium (61) based on D. plantagineum (Asplenium 
plantagineum L.) and D. grandifolium. 
4. Lygodium (106) based on L. scandens (Ophioglossum scan- 
dens L.) L. flexuosum, L. pedatum and L. Japonicum. 
5. Botrychium (110) based on B. Lunaria, B. rutaceum, B. 
Virginianum, B. ternatum) and B. zeylandicum. 
* Later in the same year Roth (Cat. Bot. 2: 143) gives Polypodium bulbiferum 
L, as the first species of Athyrium. 
