IOWA ACADEMY OF SCIENCE 
29 
V / 
V. j 
PTERIDOPHYTA. 
POLYPODIACEAE. 
POLYPODIUM (Tourn) L. 
1. Poly podium vulgar e L. Common Polypody. Found in wooded 
places along Iowa River. 
PHEGOPTERIS (Presl.) Fe.e. 
2. Phegopteris polypodioides Fee. Beech Fern. 
3. Phegopteris hexagonoptera (Michx.) Fee. Rare in rich woods. 
ADIANTUM (Tourn) L. 
4. Adiantum pedatum L. Maiden Plair. Common everywhere in 
wooded places. 
PTERIS L. 
5. Pteris aquilina L. Brake. Abundant in woodlands. 
PELLAEA Link. 
6. Pellaea atropurpurea (L.) Link. Cliff Brake. Locally plenty 
at State Quarries, etc. 
CRYPTOGRAMMA R. Br. 
7. Cryptogramma stelleri (Gmel) Prantl. Rock Brake. Plenty on 
limestone cliffs, etc. 
ASPLENIUM L. 
8. Asplenium Filix foemina (L.) Bernh. Lady Fern. Not uncom- 
mon in woods. 
9. Asplenium acrostichoides Sw. Silvery Spleenwort. Rather rare 
in woods. 
CAMPTOSORUS Link. 
10. Camptosorus rhizophyllus (L.) Link. Walking Fern. Not rare 
on limestone exposures. 
ASPIDIUM Sw. 
11. Aspidium thely pteris (L.) Sw. The Marsh Fern. In marshy 
places, often abundant. 
12. Aspidium goldianum Hook. Goldie’s Fern. In rich woodlands. 
13. Aspidium spinulosum (0. F. Mill) Sw. Spinulose Shield Fern. 
In woodlands along Iowa River. 
