42 Karl M. Wiegand and Arthur J. Eames 



Newf. to Man., southw. to Pa. and e. Iowa, and along the mts. to Ga. ; infrequent 

 on the Coastal Plain. 



2. P. rigida Mill. Pitch Pine. 



Dry hills and ravine crests, in sandy or stony sterile acid soils ; frequent. 



Widely scattered about the crests of the ravines of the basin, on the high hills 

 s. of Ithaca, along the lake cliffs, and on the sands n. of the lake; rare or absent in 

 the McLean district. 



N. B. to s. w. Ont., southw. to Ga., Ala. Tenn., and Ohio; common in the pine 

 barrens of e. N. E., L. I., and N. J. 



3. P. resinosa Ait. Red Pine. 



Habitat similar to the preceding, but preferring slightly heavier soils; infrequent. 

 May 25-June. 



"Abundant on the high ridge east of W. Danby" (D.\) ; "the largest groups are 

 on the declivities between White Church and Brookton" (D.) ; Connecticut Hill; "high 

 bank north of Lucifer Falls" (D. !) ; mouth of Coy Glen (D.) ; Six Mile Creek, n. 

 bank below Wells Falls and on the promontory e. of the Sulphur Spring (D.l) ; 

 n. bank of Buttermilk Glen (D. !) ; "east shore of Cayuga Lake, from McKinney's to 

 Ludlow ville" (D.l); "wanting on the west shore except at Taughannock and Tru- 

 mansburg ravines" (D.) ; absent from the McLean district. 



Newf. to Man., southw. to Mass., Pa., and Wis. ; rare or absent on the Coastal 

 Plain. 



2. Larix (Tourn.) Adans. 

 a. Leaves 15-28 mm. long; cones 12-20 mm. long; cone scales glabrous. 



1. L. laricina 

 a. Leaves 20-40 mm. long ; cones 20-30 mm. long ; cone scales puberulent. 



[L. decidua] 



1. L. laricina (DuRoi) Koch. (L. americana of Cayuga Fl.) Larch. Tamarack. 



About bogs, on the acid peat moors but more abundant on marl moors ; infrequent. 

 May 1-15. 



Fir Tree Swamp, Danby (D. !) ; Michigan Hollow Swamp (D. !) ; marly soil, 

 Larch Meadow (D.l) ; Freeville (D.) ; in marl, Mud Creek, Freeville (D.l) ; Wood- 

 wardia Bog (D.l); Junius peat bogs (D.l); near the Junius marl ponds (D.l); 

 Crusoe Prairie ; Duck Lake. 



Lab. and Newf. to N. W. Terr., southw. to N. J., n. Pa., n. 111., and cent. Minn. ; 

 rare or absent on the Coastal Plain. 



[L. decidua Mill. European Larch. 



Frequently planted and occasionally appearing in wild places, but probably not 

 permanent. 



Native of Eu.] 



3. Picea Link 

 a. Leaves blunt, 5-15 mm. long; twigs all spreading; cones ovate, 2-3 cm. long. 



1. P. mariana 

 a. Leaves acute, 12-25 mm. long; lateral twigs drooping; cones cylindrical, 10-15 cm. 

 long. [P. Abies] 



1. P. mariana (Mill.) BSP. (P. nigra of Cayuga Fl.) Black Spruce. 



Peat bogs, in acid soil ; rare. May. 



Spruce Swamp, Enfield (D.l), now almost extinct; Woodwardia Bog (D.l); 

 Junius peat bogs ; Crusoe Prairie ; Duck Lake. 



Lab. to N. W. Terr., southw. to N. J., Mich., and Minn., and along the mts. to 

 N. C. ; rare or absent on the Coastal Plain. 



