Lycopodium LYCOPODIAC— ISOETAC. Isoetes 



about a pondhole on Welch Point, Back Creek Neck (Ce), Long, 

 57070, 20 July 1941 (A). 



L. obscurum L. (Incl. var. dendroideum (Mx.) D, C. Eaton.) 

 Ground Pine. 



Common in the Piedmont, and Coastal Plain, southward to the 

 Virginia line. 



[L. carolinianum L. 



Reported by Redmond in "Flora of Worcester County, Md." 

 No specimen seen.] 



L. complanatum L. var. flabelliforme Fern. {L. flahelliforme Blan- 

 chard.) Running Pine. 



Common in dry woods of the Piedmont area; frequent on the 

 Coastal Plain southward to the Virginia line. 



L. tristachyum Pursh. Ground Cedar. 



Infrequent in sandy woods of the Coastal Plain; known from 

 New Castle, Cecil, Sussex, Wicomico and Worcester Counties. 



SELAGINELLACEAE (Spike-moss Family) 



Selaginella Beauv. 



S. rupestris (L.) Spring. Rock Spike-moss. 



Rare, on dry rocks: east bank of Brandy wine Creek, above 

 Augustine paper mill, Wilmington, Commons, July 1865 (A). 

 This is the only known collection in our area, but in 1937 a small 

 colony was discovered by Bayard Long on a rock some 200 feet 

 north of the state line, in Delaware County, Pa., at Point Lookout, 

 }/2 mi. n. w. of Granogue, Del. 



S. apoda (L.) Fern. (S. apus Spring.) Meadow Spike-moss. 



Frequent; Piedmont and Coastal Plain; on moist clay soil in 

 meadows and on stream banks, and in salt meadows along the 

 coast; also introduced on lawns in Wilmington. 



ISOETACEAE (Quillwort Family) 



Isoetes L. Quillwort. 

 I. Engelmanni A. Braun. 



Ponds, ditches and low woods; rather frequent in the upland 

 region of New Castle and Cecil Counties; rare on the Coastal 



[8] 



