71 L. OBSCURUM, VAR. DENDROiDEUM Michx. CommoTi. 



72 L. coMPLANATUM L. Frequent. 



73 L. TRiSTACHYUM Pursh. Starlight. 



SELAGINELLACEAE 

 SELAGINELLA Beauv. 



74 S. RUPESTRis Spring. Bald Mount, Campbell's Ledge. 



75 S. APUS Spring. Hanover Township. 



ISOETES L. (Quillwort) 



76 I. ECHINOSPORA Dur. Carmalt Lake, Susquehanna County. 



n L ENGELMANNi A. Br. River road to Hallstead, Susquehanna. 



DIVISION II. SPERMATOPHYTA 



TAXACEAE (Yew Family) 

 TAXUS L. 



78 T. CANADENSIS Marsh. (Ground Hemlock.) Not rare. 



PINACEAE (Pine Family) 

 PINUS L. 



79 P. STROBUS L. (White Pine.) Frequent. 



80 P. RiGiDA Mill. (Pitch Pine.) Common. 



81 P. viRGiNiANA Mill. (Jersey or Scrub Pine.) Barren hills in Wyo- 



ming Valley, back of Plymouth, Buttonwood. 



82 P. RESINOSA Ait. (Red Pine.) Rare. One tree at Wyoming Monu- 



ment. Prof. Dudley reports it along cliffs of Susquehanna river. 

 Prof. Thurston reported a tree at Campbell's Ledge. 



LARIX Adans. (Larch) 



83 L. LARiciNA Koch. (Tamarack.) Atherton's Pond, Bigelow Pond, 



Lehigh Pond. 



PICEA (Spruce) 



84 P. RUBRA Dietr. (Red Spruce.) Abundant on the Pocono Plateau. 



85 P. MARIANA B. S. P. (Black Spruce.) Pocono swamps. 



ABIES Hill. (Fir) 



86 A. BALSAMEA Mill. (Balsam Fir.) Pocono swamps, swamp near 



Honesdale. 



TSUGA Carr. (Hemlock) 



87 T. CANADENSIS Carr. Common. 



THUJA L. (Arbor Vitae) 



88 T. occiDENTALis L. Rare as an escape. Nicholson. 



14 



