254 UNDERWOOD: REVIEW OF THE GENERA OF FERNS 
nefort’s genus Ruta Muraria. In Hort. Cliff. 475, five species are 
cited of which the first is the one we know as A. (Chrysodium) 
aureum which may justly stand as the type of the genus, a con- 
clusion reached by Moore* and others who properly divide the 
composite as recognized by Hooker into its numerous well-marked 
genera. 
A. lanceolatum, the first species mentioned by Linnaeus in 
Species Plantarum, is a Polypodium (§ Niphobolus). 
5. PTERIS (1073) was adopted with nineteen species all but 
three of which were American. Linnaeus appears to have first 
used the generic name as such (Gen. Pl. 322. 1737) citing 
Plumier’s plates 5, 14, 15, 29, 37, 51, 68, 69, 105, 132, 140, 141; 
152, and in Hort. Cliff. 473, six species were cited from Plumier's 
plates 152, 75, 106, 69, 29, and one European species. As 
Plumier's plate 5 represents Pteris arborea L. the fifth species in 
Species Plantarum we may safely regard that as the type of the - 
genus. 
6. BLECHNUM (1077) was the only genus founded in Species 
Plantarum and was based on two species, B. orientale (Amer. 
Merid.) and B. occidentale (China)t and forms a well-defined 
genus. J. orientale, the American species, will form the generic 
type, and both species are fortunately congeneric. 
7. Hemionitis (1077) was adopted for two species, Æ. /anceo- 
lata and H. palmata, both from tropical America. The original 
Hemionitis of Bauhin and Tournefort{ was the plant from southern 
Europe now known as Asplenium Hemionitis to which alliance it 
was correctly relegated by Linnaeus himself. The Linnaean genus 
was established in Cor. Gen. Pl. 20. 1737, based on Plumier's AJ. 
151 and in Hort. Cliff. 477, he cites the same species. As these 
references are to H. palmata that plant must be regarded as the 
type of the Linnaean genus. 
8. Loncuitis (1078) was based on three tropical American 
species, L. hirsuta, L. aurita, and L. repens. The original Lonchitis§ 
of Tournefort|| is Polypodium Lonchitis L., which afterwards became 
* Index Filicum, xxi. 1857. 
t 4 f 1 J 41 Tow 1 1 r Lene, | 
ecuriQusiy 
i Inst. 546. I 322, 323. 1700. 
$ The rp f Bauhin’s Pinax, 359. 
| Inst. 538. 7.374. 1700. 
