70 The Vegetation of the 



COMPAEATIVE STATISTICS. 



The flora of Peoria contains 835 indigenous species of vascular plants, 

 of which 139 are monocarpic, 583 rhizocarpic, and 113 woody. Possibly 30 

 or 40 species more may be found — most of them in water and swamps. 

 This for so small an area, with a soil which is prevailingly arenaceous and 

 humus, only partly argillaceous, with very little calcareous matter in it, 

 is not a poor flora compared with those of larger areas. The flora of Illi- 

 nois*, when we exclude 29 species restricted to the shores of Lake Mich- 

 igan, which form a part of the Canadian flora, and 56 species of the most 

 southern part of the state along the Ohio and Wabash, belonging to the 

 flora of the Ohio Valley, numbers 1,353 species of 525 genera in 122 

 orders; 504 species have not yet been found in the vicinity of Peoria, 220 

 of which are reported only from the southward, 131 from northward, 7 

 only from westward, and 158 as well north- as southward. 



*The species excluded from the Illinois flora proper, so far only observed on 

 the shore of Lake Michigan and along the Ohio and Wabash, are the following: 

 On the shore of Lake Michigan — Eanunculus cymbalaria Ph., Sarracenia purpu- 

 rea L., Cakile americana Nutt,, Hypericum kalmianum L., Drosera rotundifolia 

 L., Drosera longifolia L., Lathyrus maritimus Big., Potentilla anserina L., Lin- 

 naea borealis Gron., Aster macrophyllus L., Solidago virga-aurea L. var. humilis, 

 Solidago Muhlenbergii T. Gr., Silphium trifoliatum L., Cirsium Pitcheri T. Gr., 

 Corispertnum hyssopifolium L., Rumex maritimus L., Euphorbia polygonifolia 

 L., Salix adenophylla Hook., Juniperus sabina L. var. procumbens. Potamogeton 

 praelongus Wulf., Habenaria Hookeri Torr., Habenaria lacera R. Br., Medeola 

 virginica L., Juncus balticus Deth., Juncus Gerardi Lois., Eriophorum virginicum 

 L., Carex aurea Nutt., Carex Crawei Dew., Calamagrostis arenaria Roth. ; along the 

 Ohio and Wabash — Magnolia acuminata L., Cocculus carolinensis D. C, Calyco- 

 carpum Lyoni Xutt., Xuphar sagittifolia Ph., Cabomba caroliniana Gr., Corydalis 

 flavula Raf., Draba brachycarpa Nutt., Elodes petiolata Ph., Cassia obtusifolia L. 

 Myriophyllum ambiguum Nutt., Jussiaea repens L., Jussiaea decurrens D. C, 

 Ludwigia cylindrica Ell., Galium lanceolatum Torr., Mikania scandens L. Solid- 

 ago odorata Ait., Iva ciliata Willd., Verbesina occidentalis Walt., Anaphalis mar- 

 garitacea Benth. Hook., Rhododendron nudiflorum Torr., Hottonia Intlata Ell., 

 Catalpa speciosa Ward., Epiphegus virginiana Bart , Verbena Aubletia L., Scu- 

 tellaria serrata Andr., Pycnanthemum muticum Pers. (forma typica), Hydrophyl- 

 lum macrophyllum Nutt., Phacelia Purshii Buckl., Hydrolea affinis Gr., Obolaria 

 virginica L., Trachelospermum difforme Gr., Gonolobus laevis Michx., Iresine 

 celosioides L., Brunnichia cirrhosa Banks, Acalypha caroliniana Walt., Tragia 

 macrocarpa Willd., Quercus lyrata Walt., Quercus Phellos L., Fagus ferruginea 

 Ait., Taxodium distichum Rich., Cupressus thyoides L., Najas indica var. gracil- 

 lima A. Br., Goodyera repens R. Br., Iris cuprea Ph., Commelyna erecta L., Het- 

 eranthera reniformis R. P., Heteranthera limosa Vahl., Cyperus flavescens L., 

 Fuirena squarrosa Michx., Rhynchospora corniculata Gr., Carex gigantea Rudge, 

 Arundinaria tecta Muhl., Leptochloa mucronata Kth., Dicksonia punctilobula 

 Kunze, Botrychium lunarioides Sw. var. obliquum, Orhiglossum vulgatum L. 



