BOTANICAL GAZETTE, 55 



23. Comptonia asplenifoUa, Ait. Very common on the sand plains near Kilbourn 

 City and on the more barren rock. 



23. Betula papymcM, Alt. Very common. 



24. Piiius Banksiana, Lambert. Common on the sandy plains. Known as "Jack 

 Pine." 



25 Pinus Strobus, L. Growing here, but the Deils are south of the "pine regions" 

 of Wisconsin. 



26. Abies Cnnadensis, Michx. Very common. 



27. Hubenaria Hookeri, Torr. Not uncommon with Linncea, Mitchella, etc. In 

 fruit, but the blossoms not yet fallen. 



Composite were not at all abundant, but we notice Liatru cylindracea, Michx., and 

 Aster (SHtivus, Ait., on the rock opposite Gates' Ravine. 



Ferns. — 1. Polypodium viilf/are, L. Very common. 



2. Adiantumpedatuin. L. Quite commou. 



3. Pteris nquilinn, L. Quite common. 



4. Pellcea atropiirpuren, Link. On Sugar Bowl, Steamboat Rock, and similar rocks. 

 As thrifty on the sandstones as when growing on the calcareous rock of Southern 

 Wisconsin. 



5. Asplenium Trichomanes, L. Very common. 



6. Asplenvim thelypteroides, Michx. Not uncommon. 



7. Pher/opteris Dryopteris, Fee. Very common in the side glens. 



8. Aspidiumfrrrgmns, Swartz. This fern, first found within the limits of the United 

 Stiites by Dr. Parry, is not rare on the Wisconsin. 



n. Agpidium spimtk'sum, Swartz. The specimens we saved are not of the type, nor, 

 with certainty, either of the varieties, for the scales of the stipe are entirely brown, but 

 tlie lobes of the pinnules are spinulose, and not obtuse. Is not this another of the many 

 jilants where the so-callod "varieties" are merely forms with individual instead of local 

 peculianiics. 



10. Asspidiam mnrginale, Swartz. Very common. 



11. Cystopteris biilbif era, HernXx. Not common. 



12. Cystopferis fragilis, Bernh. Exceedingly common and variable. 



13. Oiiodea sensibili.t, L. Not common. 



14. Woodsid Iloeusis, R. Brown. The most common rock fern of the Dells. 



15. Oninuiida regtdh, L. Common in the glens. 



16. (hnnnidn Clnytoniand, L. The common fern of the glens. 



17. Botrychiaia Virginicnm, Swartz. Common. 



18. Cfonptosonis rliizophyUuH, Link. This undoubtedly grows here, as we have 

 found it on the sandstone further south. 



Growing with the ferns is Lycopodiuvi lucidnhnn, Michx.— Hkubert E. Cope- 



L.VND. 



The Introductiox op Foreign Plants. — The subject of the introduction of for- 

 eign plants is one of interest to botanists in all sections of the country, and is gradually 

 becoming more so as the geographical distribution of species is being carefully investi- 

 gated. There are various ways by which this may be effected, and as it can not be told 

 when nor how it may occur, it behooves all lovers of science to keej) wide awake, care 

 lully noting the advent of hitherto strangers in Flora's household. The agency of wind 

 is a powerful one in this regard, particularly with respect to that large order, Cornposittv, 

 the seeds of many of which are furnished with a feathery pappus, and are often carrierl 

 through the air long distances and deposited on the sides of high mountains, or in the 

 depths of low fertile plains, oftimes a very difl'ercnt location from the usual habitut. 

 The flight of birds, doubtless, furnishes one of the most powerful agencies, as their 

 migiation, especially near the coast, is sufficiently rapid to carry .seeds that will germi- 

 nate when a proper condition is found. In the southern counties of New Jersey 



