322 IOWA ACADEMY OF SCIENCE Vol. XXVI, 1919 



Pellcoa atro purpurea (L.) Cliff brake. In localities where it is 

 found this species is frequent in crevices of rocks ; in Nebraska 

 found only in the southeastern portion. 



Cass county : Weeping Water, dry calcareous rocks, May 23, 1887, 

 No. 6108, H. J. Webber; April 19, 1919, R. J. Pool. 



Nemaha county : Brownville, January 2, 1889, No. 6109, H. J. 

 Webber; reported from the vicinity of Peru by Bessy and Webber. 



Jefferson county: Endicott, July 17, 1892, Miss Case; August 23, 

 1893, No. 2001, A. F. Woods and DeAlton Saunders. 



Woodsia obtusa (Spreng.) Torrey. This species seems to be 

 limited mostly to the southeastern portion of the state, rarely found 

 in the central and western portions. Found in crevices of rock 

 cliffs. 



Pawnee county : Pawnee City, 1892, C. H. Barnard. 



Lancaster coutity: Emerald, December 7, 1895, No. 6774, A. S. 

 Himter. 



Custer county: Callaway, July 3, 1902, No. 2370, Rev. J. M. 

 Bates. 



Brown county : Long Pine, reported by Bessey and Webber. 



Woodsia oregana D. C. Eaton. This species apparently is con- 

 fined to the western half of the state; it is frequent on dry open 

 bluffs. 



Thomas county : Dry banks. Dismal river, July 12, 1889, No. 

 6106, H. J. Webber; on hillside near Plummer ford. Dismal river, 

 July 3, 1893, No. 1479, P. A. Rydberg. 



Brown county: Long Pine, collected by /. Conklin, No. 8 ex- 

 herbarium G. D. Swezey; Long Pine, canons, July 23, 1887, C. E. 

 Bessey. 



Dawes county: Belmont, drv banks, July 18, 1889, No. 6105. 

 H. J. Webber. 



Sioux county: on buttes, August, 1892, No. 440, Albert F. 

 Woods; Hat creek, June 24, 1890, Tom A. WiUiams. 



Marsiliaceae. 



Marsilea vestita Hook, and Grev. Hairy pepperwort. In ponds, 

 frequent in many places in the state. During periods of drought 

 terrestrial specimens may be found having hairy and narrow leaflets 

 and these have been named the variety tenuifolia Und. and Cook. 



Jefferson county: Meridian township, section 22, 1891, E. F. 

 Lange; Fairbury, September 3, 1892, E. F. Lange. 



Fillmore county: Fairmont, August, 1890, and August 4, 1891, 

 /. H. Hauahaii'out: August. 1890, No. 6113, labeled var. tenuifolia 



