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Pell.^a atropurpurea occidentalis n. var. Stipes tufted on 

 exceedingly short rootstalks, 1-4001. long, purple; leaves simply 

 pinnate with 1-3 pair, 1 cm. long; pinnae oval or ovate, mostly 

 truncate at base, 6-iomm. long, 5mm. broad or less, usually sessile. 

 Collected in a canon in the Laramie Hills by Prof. Aven Nelson 

 and the writer in 1896, June 13, No. 191 9. 



The bracken, Pteris aquilina, has been found at several sub- 

 alpine localities in the State, and grows most luxuriantly in moist 

 " quaken asp" groves, where the soil is rich and loamy. It attains 

 a considerable size, the large, handsome leaves together with the 

 stipe often measuring six feet in length. Notholcsna sinuata and 

 Dryopteris Lonchites occur high in the mountains. The latter is 

 a beautiful plant as it grows on some moist, grassy slope. The 

 rock-brake (Cryptogramme acrosticoides) grows in dense tufts 

 among rocks. Asplenium Filix-fcemina and A. viride are from 

 the western part of the State. The latter is a delicate little plant, 

 and is found at high altitudes in the Teton Mountains. 



Of the fern allies, the scouring rushes, Eqttisetwn varie- 

 gatum, E. lavigatum and E. hyemale, are found in meadow land 

 along streams. The last is very common on the Laramie Plains. 

 Equisetum arvense prefers the wooded banks of small streams in 

 the foothills. Its variety, alpestre, is found in similar locations, 

 but at higher altitudes. Equisetum robustum occurs occasionally 

 in moist "quaken asp " groves in the hills. Selaginella rupestris 

 is frequent on bare ridges and in dry rocky valleys. 



The above named species of ferns and fern allies are repre- 

 sented in the Herbarium of the University of Wyoming, and 

 have nearly all been collected by Prof. Aven Nelson. A few 

 others, besides, are known to exist in the State. Pellcea Breweri, 

 P. densa and Dryopteris spinulosa are reported from the Teton 

 Range; Isoetes Bolanderi and Botrychiunt Coulteri from Yellow- 

 stone Park ; and Onoclea sensibilis from the northeastern part of 

 the State. This makes* in all twenty-five Pteridophytes for 

 Wyoming. Future collections will undoubtedly add a few more 

 to this number. 



University of Wyoming, Laramie, Wyo. 



Mr. F. G. Floyd was fortunate enough, last summer, to find 

 a large clump of Dicksonia pu7ictilobula containing hundreds of 

 plants all crested in a very beautiful manner. Further mention 

 of this find will be made in our next issue. 



