598 



58. Liliitm canadensc L. LUiaceae 



In the meadow; common, especially west of Glencoe. 



59. Iris versicolor L. Iridaccac 



In the reed swamp and swamp meadow ; common. 



Orchidaccae 



60. Habcnaria Iciicophaca (Nutt.) Gray 



Observed in the meadow, west of Glencoe ; only one small 

 colony of plants found. 



61. Salix nigra Marsh. Salicaccae 



Here and there in wet soil, mostly along the roads. 



62. S. amygdaloides Anders. 



The most abundant of the willow trees in Skokie Marsh ; 

 preferring the wet places. 



63. S. alba L., var. vitcllina (L.) Koch 



Occasional as a large tree in rows along ditches west of Glen- 

 coe and Winnetka, where it was evidently planted by man. 



64. vS". longifolia Muhl. 



Frequently covering low wet depressions in the swamp 

 meadow. Flowering in fre(|uent cases until late autumn. (PI. 

 XCVI, Fig. 21.) 



65. S. cor data Muhl. 



In wet places ; frequent. 



66. S. discolor Aluhl. 



In wet places ; common. 

 S. discolor var. prinoidcs (Pursh) Anders. 



Several shrubs in the marsh, appearing as hybrids between 

 S. discolor and S. cordata, are referred to this variety. 



67. S. pctiolaris J. E. Smith 



In meadow and outer part of swamp meadow; occasional. 



68. S. luivnilis Marsh. 



In the meadow ; found only sparingly. 



69. S. rostrata Richards 



West of Glencoe and I\a\'inia; rare. 



Not?:. — Two or three other forms of Salix were found, which were not typ- 

 ical of any known species, hut appeared to he hyhrids hetween certain 

 species enumerated above. In the absence of expert opinion concerning 

 their status, separate treatment is here omitted. Salix fragilis, occurring 

 in the swamp meadow along certain roads and apparently adventive recently, 

 is likewise omitted in the list. 



