60 The Vegetation of the 



Potamogeton natans L. waters, sloughs and rivers V. 10 Atl.— Pacif.G.— 



60° N.L. 

 Potamogeton pauciflorus Ph. pools 1. 5 N.E.— Ga.— N.Mex. — Up.Miss. 

 Potamogeton pusillus L. River I. 5 N.E.— R.Mts.— 60° N.L. 

 Potamogeton pectinatus L. River V. 8 Atl.— Pacif.G.— 55° N.L. 



Alisraaceae. In N.Am. 6 Gen. 15 Spec. 



Triglochin palustre L. bottom springy places III. 8 N.Y.— Up.Miss. R.Mts. 



— Alaska— Greenland. 

 Triglochin maritimum L. var. elatum bottom springy places II, 4 N,Y.— Cal 



Labr. — Alaska. 

 Alisma Plantago L. shallow waters V. 5 N.E.— Ga.— Cal.— 55° N.L. 

 Echinodorus rostratus Engelm. low banks III. 5 Fla.— Ariz. — Up.Miss. 

 iSagittaria variabilis Engelm. low banks, pools VII. 7 Atl.— Pacif.G.— Can. 



N.F. 

 ISagittaria calycina Engelm. swamps II. 3 N.E. — Up.Miss. 

 Sagittaria heterophylla Ph. swamps, low banks II. 8 N.E.— Fla.— Miss. 



HydrocharidacesB. In N.Am. 3 Gen. 3 Spec. 



Anacharis canadensis Planch, creeks IV. 10 N.E.—N.Ca.— Up.Miss.— 55° 



N.L. 

 Valisneria spiralis L. river IV. 10 Atl.— Miss. 



Orchidaceae. In N.Am. 24 Gen. 99 Spec. 



Orchis spectabilis L. wooded hillsides III. 4 N.E. — All. (Ga.)— Up.Miss. 



Habenaria virescens Spr. wooded hillsides II. 3 Atl. — Miss.G. — Can. 

 jHabenaria hyperborea R.Br, bottom springy places I. 2 N.E.— Or. Alaska- 

 Greenland. 



Habenaria leucophjea Gr. wet prairie I. 5 Oh.— Up.Mo. 



Spii'anthes cemua Rich, moist banks II. 3 Atl. — W.Tex. — Or.G. — Can. 



Spiranthes gracilis Big. dry hillsides III. 3 Atl. — Miss.G. — Can. 

 tPogonia pendula Lindl. woods I. 3 Atl.— Miss.G.— Can. 



Liparis Lceselii Rich, swamps I. 4 N.E. — Up.Miss.— 54° N.L. 



Liparis liliifolia Rich, shady hillsides I. 1 N.E. — Up.Miss. 



Corallorhiza odontorhiza Nutt. woods I. 2 N.Y.— Fla. — R.Mts. 

 tAplectrum hiemale Nutt. woods I. 3 N.E.— All.— Up.Mo. 



Calopogon pulchellus R. Br. swamps 1. 4 N.E.— Up.Miss. Fla.— La. 



Cypripedium canclidum Muhl. bottom II. 3 VV.N.Y. — Up.Miss. 

 fCypripedium parviilorum Salisb. bottom I. 2 N.Y.— All.— La.— Up.Miss. 



Cypripedium pubescens Willd. woods V. 4 N.E.— All. — La.— R.Mts. 



Cypripedium spectabile Sw. bottom, springy places II. 4 NE. — N.Ca.— Miss. 



Amaryllidacese. In N. Am. 5 Gen. 21 Spec. 



Hypoxis erecta L. dry open woods, prairie V. 4 Atl.— R.Mts. G.— Can. 

 Iridaceae. In N. Am. 3 Gen. 21 Spec. 



Iris versicolor L. bottom, banks V. 5 Atl.— Up.Mo. G.— Can. 

 Sisyrinchium Bermudiana L. prairie, open woods V. 6 Atl. — Pacif. G— 

 Alaska, 



DioscoreaceaB. in N. Am. 1 Gen. 1 Spec. 



Diosoorea villosa L. woods, copses IV. 4 Atl. — Miss. G. — Can. 



Smilacaceae. In N. Am. 1 Gen. 14 Spec. 



Smilax hispida Muhl. moist copses, banks V. 5 W.N.Y. — La. — Up.Miss. 

 Smilax herbacea L. banks, bottom V. 4 Atl.— Up.Mo. G.— Can. 



