560 PROCEEDINGS OF THE ACADEMY OF [Oct., 



f77. Smilax rotuxdifolia L. 



Abundant in depressions of barrens, frequently climbing high on 

 Juniperus virginiana. 



Delaware. — FawkesRun; Bear Hill; Mineral Hill; Wawa. 



Chester. — West Chester ; Sconnelltown. 



— Nottingham Barrens. 



f78. SlSYRIXCHIUM MUCROXATUM Michx. 



Common on dry open barren. 

 Delaware. — Mineral Hill; Wawa. 



Chester. — Sugartown Barrens (E. B. Bartram) ; Serpentine Ridge 

 Cedar Barrens; West Chester. 



$79. Gyrostachys gracilis (Bigel.) Kuntze. 



Occasional on dry open barren. 

 Delaware. — Williamson. 

 Chester. — Brinton's Quarry. 



80. Leptorchis loeselii (L.) MacM. 



Occasional on moist shaded banks. 

 Delaware. — Middletown Barrens. 

 Chester. — Cedar Barrens. 



81. Populus graxdidextata Michx. 



Occasional in woodland. 

 Dela ware. — Williamson . 

 Chester. — Unionville. 



— Nottingham Barrens. 



■"-to-* 



82. Salix humilis Marsh. 



Frequent or local on dry open barren. 

 Delaware. — Williamson. 

 Chester. — Unionville. 



S3. Salix tristis Ait. 



Frequent or local on dry open barrens. 

 Delaware. — Williamson ; Wawa. 

 Chester. — Nottingham Barrens. 



84. Comptoxia asplexifolia (L.) 



Occasional on dry open barren. 

 Delaware. — Middletown Barrens; Wawa. 



