6 
into Mexico and some even to South America, and a few of 
them also occurring in California. 
Gymnogramme pedata, (Sw.) Kif. Cheilanthes lanuginosa, Nutt. 
Notholena sinuata, (Sw.) Kif. ay Wrightii, Hk. 
‘s  ferruginea, (Willd.) Hk. “a microphylla, Sw. 
“ candida, M. & G. Pellwa pulchella, (M. & G.) Fée. 
«« —_ cretacea, Liebm. *« flexuosa, (Kif.) Link. 
‘¢ — dealbata, (Pursh.) Knz. : “ Wrightiana, Hk. 
ah Fendleri, Knz. Adiantum Chilense, Kif. 
Cheilanthes aspera, Hk. Woodwardia radicans, (L.) Sw. 
s Fendleri, Hk. Aspidium juglandifolium, Knz. 
se Lindheimeri, Hk, Aneimia Mexicana, Klotzsch. 
««  Eatoni, Baker. 
The prevalence of the drought-resisting genera Notholena, 
Cheilanthes and Pellea in this list will be at once noticed. The 
precise range of many of these we have yet to learn. Gymno- 
gramme pedata, Notholena ferruginea, N. candida, N. ecretacea, 
Cheilanthes microphylla, are all known to extend into Mexico 
and Central America. Adiantum Chilense and Woodwardia radi- 
cans also occur in California, Lut their relations are rather with this 
group, and the latter species is the only one of the group which 
also appears in the old world. eas 
VI. Trortcat: inhabiting the border of the Gulf of Mexico, most — 
of the species extending into the West Indies and Tropical Amer- _ 
- ica: ie iy % 
Acrostichum aureum, L. Asplenium dentatum,L. 
Vittaria lineata, (L.) Sw. e a myriophylilum, Presl. 
Polypodium Plumula, Kunze. Aspidium patens, Sw. 
4 incanum, L. #¢ Ludovicianum, Knz. 
rs aureum, L. ; ar unitum. (L.) Mett. 
“4 Phyliitidis, L. Nepihrotepis exaitaia, (Sw.) Schott. 
Cheilanthes Alubamensis, Knz. Trichomanes Fetersii, Gray. 
Pteris Cretica, L. ty radicans, Sw. 
“longifolia, L. : Aneimia adiantifolia, ‘L.) Sw. 
Adiantum Capilius-Veneris, L. Ophioglossum bulbosum, Mx. 
‘ 
B echnum. serrutatum, Mx. : nudicaule, L. fil. 
Of the above, we note that Zrichomanes Petersii is quite local, 
having been seen only in Alabama and Florida. Cheilanthes Ala- 
bamensis reaches through Texas into New Mexico. Polypodium 
incamun extends farther north than any other in the group—reach- 
ing Virginia, on the sea board, and extending up the Mississippi 
Valley into Illinois, but avoiding the colder mountainous region 
between. Adiantum Capillus Veneris reaches N. Carolina on the 
east of the mountains and Missouri on the west.* This species is 
almost cosmopolitan and reaches high latitudes in the old world, 
but with us is limited as above. The two species of Pteris of this 
group also extend around the globe except in high latitudes, 
Of the 125 species here enumerated, 69, or about 55 per cent., are 
found in the new world only, and of these 69, about 53, or over 42 
per cent. of the whole, are restricted to the limits we have defined, 
except that a few of them extend more or less into Mexico, ; 
We have then, 72 species left, which we share with other por- 
tions of the world—some of which are represented in more than one © 
other region. A brief glance at the numerical relationship of these — 
is all.that we have space for, pol Sule tos 
We have 40 species in common with Europe, of which 4 are not 
found: elsewhere. KR 
* It also reappears in Utah and Arizona, 
