Filices Adansonianae. | 289 
Polystichum cristatum Dryopteris cristata 
> strigosum > strigosa 
» multiflorum > dilatata 
> spinulosum > spinulosa 
Polystichum? Marantae Woodsia ilvensis. 
This is 9 Dryopteris, 2 Polystichum, and 1 Woodsia.  Polystichum 
of Rotn, therefere, should be the synonym of Dryopteris. Polystichum 
became valid after Scaorr (Genera Filicum, 4834) and contained Poly- 
stichum acrostichoides, P. aculeatum, P. Bridgesi, P. caespitosum, P. co- 
riaceum, P. marginatum, P. ocellatum, P. rufobarbatum and P. setosum. 
Fifteen years before ScHoTTt, Josepxius Rappius described and figured Ru- 
mohra aspidioides in “Synopsis Filicum Brasiliensium’ and also in 1825 
in his “Plantarum Brasiliensium nova genera et species novae vel minus 
cognitae’. That is real Polystichum of the present sense. 
2. Fern-collections of Adanson. 
Apanson had good collections of plants, and the specimens of Ferns 
are also rich. The collectors are quite unknown, but the specimens cover 
the Ferns of Europe, Canary Islands, Cape, Bourbons, Ceylon, East-Indies, 
Java, West-Indies, and North- and South-America. It is pity that his spe- 
cimens were kept untouched, when his genera were often the foci of 
systematic discussions. The genera proposed by him are Thelypteris, 
Adiantum, Scolopendrium, Ceterac, Filix, Dryopteris, Polypodium, He- 
mionitis, Blechnum, Osmunda, Angiopteris, Ophioglossum, Palmañfilix, 
Pilularia, and Lemma. Among these Thelypteris, Scolopendrium, Ceterac, 
Dryopteris, Angiopteris, and Palmafilix are the first generic names ap- 
peared after 1753 (the year in which the epoch-making “Species Plan- 
tarum’ of Linnarus was published). 
I. Thelypteris (p. 20) comprises 5 genera of 3 families; the species are 
1. Alsophila microdonta. 
2. Antrophyllum lanceolatum. 
3. Dryopteris spinulosa (poorest and smallest specimen), D. The- 
lypteris, D. Linnaeana. 
. Pteridium aquilinum (more than 10 specimens), P. capense 
(single pinnule). 
5. Pteris biaurita, P. caudata, P. ensiformis, P. gigantea, P. longi- 
folia, P. podophylla, P. semipinnata. 
— 
6. Gleichenia rufinervis. 
Such a complicated genus make no use for taxonomy 
