XIU. 
LISTS AND COLLECTED DESCRIPTIONS OF PLANTS.* 
I. CATALOGUE OF A COLLECTION OF PLANTS MADE IN ILLINOIS AND MISSOURI, 
BY CHARLES A. GEYER; WITH CRITICAL REMARKS, ETC. 
From THE AMERICAN JOURNAL OF SCIENCE, VoL. XLVI. 1848. 
Mr. Geyer, who is an excellent collector, is now absent on an expedition to the Rocky [94] 
Mountains and Oregon, as announced in the last volume of this Journal (p. 226). Being 
unwilling to adopt the common plan of selling his collections to subscribers before they are actually 
made, he prefers to seek some needful aid in the prosecution of his arduous undertaking, by offering 
to the botanical public sets of the following plants, collected in 1842 near St. Louis, Missouri, and 
around Beardstown on the Illinois River. 
Vol. XLV.) consists of the following species : — 
This collection (which is duly mentioned on p. 227 of 
1. Ranuncutvs micrantuvs, Nutt. Apparently common in the grassy river bottoms, and on fertile grassy hills 
in Missouri and Lllinois. 
more orbicular, very seldom cordate or reniform lowest leave 
4. IsopyruM Srremearce, Torr. 
mus, Linn. Certainly a native plant.! 
It is very near R. abortivus, but oo well distinguished 2 its pubescence, and the 
. Myosvurvs MINI- 
R. Fascicunaris, J 
Gr. one TRICORNE, [95] 
Michz. 6. TRavtveTTerta paLMata, Fisch. & Mey.; an entirely new locality for Pes rare plant, which has 
heretofore been found only in the Alleghany and Rocky Mountains. 
the smaller, glaucous variety of the banks of the western rivers. 
inn. §. VIRGINICA. 
15. Leprpium Virernicum, Linn. 
TICILLATA, Linn. 
SENIA PELTATA, Pursh. 9. Cornypauis auREA, Willd. ; 
10. Carpamine Lupoviciana, Hook. 11. C. nirsuta, 
A BRacHycaRPa, Nutt. 
Rea, Nutt. 17. P. mivcarnata, Linn. 18. P. ver 
14. D. Carotrniana, Walt. 
7. THALICTRUM ANEMONOIDES, Michx. 8. Bra- 
12. SisymBriuM CANESCENS, Nutt. 13. 
16. PoLyGALA PURPU- 
19. Viota pepata, Linn, 20. V. peLpuintrouia, Nutt. ; common in rich prairie soil in Illinois and Missouri, 
* Arranged chronologically as far as practicable. — Eps. 
1 We now ought to be careful observers of such plants as 
are apparently common to both continents ; in after years it 
will be much more difficult to decide which are natives and 
which introduced. Many European plants, now common 
east of the Alleghany Mountains, have not yet found 
their way to the Mississippi valley, but undoubtedly will 
arrive in a short time. 
common as they are in Europe, from whence they were de- 
rived, or in middle Asia, perhaps their original home. It 
behooves us therefore to note the — of these intruders, 
and distinguish from them the true native 
hh are able to distinguish several different classes of such 
tg Wesrky allied where one takes the 
us 
sp. (P. mite, Pers.) and P. mite, Schrank ; Androsace occiden- 
talis and = ongata ; Lycopus sinuatus and L, Europeus, 
ee dis 
2. Geographical varieties, where no specific distinction 
ean be discovered between the natives of both continents, 
but where the American and European variety can always be 
distinguished by some points of minor importance. Such are 
Sium latifolium, Circa lutetiana, Samolus Valerandi (if 
it does not belong to the first class), Castanea vesca, Lepidium 
us hypoglottis, Eriophorum gracile, Myo- 
3. Ideationt aa true natives of both continents, espe- 
cially arctic or at least northern plants ; also 
and cryptogamic plants; e. g. Potentilla anserina, Cam- 
iad rotundifolia, Epilobium spicatum, Cornus Suecica, 
Phragmites apc Salicornia herbacea, Glaux maritima, 
most mp nse 
4. caked eee spreading with the progress of 
ve in the neighborhood of St. 
-Leonis, Marrubium vulgare, Trifo- 
repens, m Thapsus, and V. 
Blattaria (perhaps belonging to the third class), Nepeta 
Cataria, Arctium minus, ete. Cichorium ppl Echium 
vulgare, and others, I have not seen in the Wes 
It is difficult to decide to which of these ene Datura 
Portulaca oleracea should be referred. 
Datura is perhaps in Siero in Europe as well as America, 
and possibly did not reach this country from Hurope. Eri- 
geron Canadense and Cinothera biennis are now as as widely 
naturalized in Europe, as Taraxacum is in 
