Climate of Middle Illinois. 57 



NyctaginaoesB. In N. Am. 10 Gen. 50 Spec. 



Oxybaphus nyctagineus Sweet fence rows, banks V. 5 Up.Miss.— La.— N. 

 Mex.— Up.Mo. 



PhytolaccacesB. In N. Am. 4 Gen. 5 Spec. 



Phytolacca decandra L. bottom, banks V. 3 N.E— Up.Miss. Fla.— N.Mex. 



Chenopodiacese. In N. Am. 17 Gen. 83 Spec. 



Chenopodium album L. bottom, fence rows X. 8 Atl.— Pacif.G.— Gr. Bear 



Lake. 

 Chenopodium hybridum L. bottom V. 5 Atl.— Pacif.G.— Sask. 



AmarantacesB. In N. Am. 16 Gen. 46 Spec. 



Montelia tamariscina Gr. bottom VIII. 8 Vt.— Up.Mo.— W.Tex. 

 Amarantus albus L. waste places IV. 5 Atl— N.Mex. B.Mts.— Or. 

 Amarantus retroflexus L. bottom, waste placos VIII. 8 Atl.— N.Mex.— 



R.Mt3. 

 Amarantus blitoides Wats, waste places V. 7»Mex.— R. Mts.— Up.Miss. 



Polygonaceae. In N. Am. 16 Gen. 197 Spec. 



Polygonum pennsylvanicum L. moist places VI. 6 Atl.— Mex.G.— Can. 

 Polygonum incarnatum Ell. moist places III. 5 Atl. — Mex.G.— Can. 

 ♦Polygonum hydropiper L. moist places, ditches VI. 10 N.E.— Ariz. 

 Polygonum acre H.B.K. bottom V. 3 Atl.— Mex.— Cal.G.— Can. 

 Polygonum hydropiperoides Michx. moist places V. 6 Atl.— Mex.G.— Can. 

 Polygonum amphibium L. waters, sloughs, banks X. 8 Atl.— Mex.G.— Or. 



Gr. Slave Lake. 

 Polygonum virginianum L. woods V. 3 N.E.— Fla.— Up.Mo. 

 Polygonum aviculare L. roadsides, yards X. 10 Atl. — Mex.G.— 72°N.L. 

 Polygojium erectum L. yards, roadsides V. 5 Atl.— Can.— Or. 

 Polygonum ramosissimum Michx. bottom IV. 4 N.E.— Up.Mo. 

 Polygonum tenue Michx. dry soil, hillsides V. 5 N.E. — All.— La.— Sask.— Or. 



Mex. 

 Polygonum sagittatum L. bottom II. 8 Atl. — Miss.G.— Can. 

 Polygonum dumetorum L. copses, banks V. 5 Atl. — Miss. — R.Mts.G.— Can. 

 Rumex orbiculatus Gr. bottom, swamps II. 4 N.E— Up.Miss. 

 Rumex britannica L. banks, moist places IV. 5 N.Y.— W.Tex. 

 Rumex vertieillatus L. moist soil, banks V. 5 Atl. — Miss.G. — Can. 



Lauracese. In N. Am. 5 Gen. 8 Spec. 



Sassafras officinalis Nees. woods V. 4 Atl.— Up.Mo. G.— Can. 



Thymeleaceae. In N. Am. 1 Gen. 2 Spec. 



Dirca palustris L. bottom, springy places II. 3. Atl. — Cal.G.— Can. 



Santalaoese. In N. Am. 3 Gen. 6 Spec. 



Comandra umbellata Nutt. dry hillsides, copses IV. 5 N.E.- All. (Ga.)— 

 Mex.G.— Can. 



SaururacesB. In N. Am. 2 Gen. 2 Spec. 



Saururus cernuus L. swamps, springy places V. 6 Atl.— Miss. G.— Can. 



Oeratophyllacese. In N. Am. 1 Gen. 2 Spec. 



Ceratophyllum demersum L. waters X. 10 Atl.— Pacif. G.— 62°N.L. 



Oallitricbaceae. In N. Am. 1 Gen. 6 Spec. 



Callitriche heterophylla Ph. waters III. 5 Atl.— Pacif. G.— 71°N.L. 



♦Polygonum hydropiper may be indigenous as well as not. Porter, in Wheeler's Report, says: 

 " Introduced? " De CandoUe has it not in the list o{ introduced plants. 



