1912.] NATURAL SCIENCES OF PHILADELPHIA. 535 



pears to be known as yet only from the Serpentine Barrens of Dela- 

 ware, Chester, and Lancaster Counties, Pennsylvania, apparently 

 strictly restricted to such soil. Doubtless it extends over the boundary 

 into Cecil County, Maryland, and possibly beyond. As Serpentine 

 Barrens exist only in this corner of Pennsylvania, and do not exist 

 at all in West Virginia, the range as given in the new Gray's Manual 

 is impossible. If the plant does occur as reported in West Virginia, 

 it must be on some other soil, not on adjacent Serpentine areas. 



208. Antennaria neodioica Greene. Add: 

 Chester. — Cedar Barrens. 



210. Antennaria plantaginifolia (L.) Richards. Add: 

 Zoster.— Nottingham Barrens (B. Long). 



f212. Heliopsis helianthoides (L.) Sweet. 



Varies greatly even in same colony in relative width of leaf, also 

 in roughness of its upper surface from nearly smooth to quite sca- 

 brous. Within our range, I do not think H. scabra Dunal can be 

 distinguished. 



f215. Senecio balsamit^e Muhl. Add: 

 Newcastle. — Centerville (A. Commons). 



11. Emendations of the List of Occasional Species of the 



Conowingo Flora. 

 Insert : 



0a. Botrychium obliquum Muhl. 

 Delaware. — Williamson. 



Insert : 

 Ob. Adiantum pedatum L. 



Chester. — Cedar Barrens. 

 Insert : 



6a. PASPALUM L.EVE AUSTRALE Nash. 



Chester. — Serpentine Ridge. 



7. Paspalum l,eve circulare (Nash) Stone. 13 Add: 

 Chester.- — Nottingham Barrens (B. Long). 



12. Paniccm lindheimeri Nash. Add: 

 Chester.- — Nottingham Barrens (B. Long). 



13 Annual Report New Jersey State Museum (1910), 187. 

 35 



