The Flora of the Cayuga Lake Basin 161 



Lansing Swamp (D. in C. U. Herb.) ; Ovid {Braver & Checkering in Sartwell 

 Herb.); Ledyard, 1827 (/. /. Thomas). Sporadic in distribution; absent on the 

 acid chestnut soils. 



Vt. to Sask. and Oreg., southw. to Ga., Mo., and Calif. ; rare or absent on the 

 Atlantic Coastal Plain. A plant of the rich soils of the interior. 



Class II. DICOTYLEDONEAE 



29. PIPERACEAE (Pepper Family) 



1. Saururus (Plum.) L. 

 1. S. cernuus L. Lizard's Tail. 



Muddy swamps, brooks, and ditches ; frequent. July 10-Aug. 



Indian Spring marsh (D.\) ; w. side of Inlet Marshes; Warren farm, Forest Home; 

 Dryden Lake valley (D.) ; Lake Como (Locke Pond, D.) ; w. of Canoga Marshes; 

 near Clyde River, Galen ; Howland Island ; " abundant on the borders of Cayuga and 

 Montezuma Marshes " (£>.). 



R. I. to Fla. along the coast, and from cent. N. Y. to Minn, and Tex. 



A plant of the Coastal Plain and of the Great Lakes Basin, frequent on the Ontario 

 plain of central N. Y., and, with the exception of the Dryden Lake and Lake Como 

 stations, confined to the vicinity of Cayuga Lake. Traces of salt may be the 

 influencing factor in the distribution of the plant. 



30. SALICACEAE (Willow Family) 



a. Disk beneath each flower cup-shaped ; stamens numerous ; scales lacerate ; leaves 

 ovate or deltoid ; winter-bud scales several. 1. Populus 



a. Disk consisting of 1-several finger-shaped or forked nectaries ; stamens few ; scales 

 entire or subentire; leaves lanceolate; winter-bud scale 1. 2. Salix 



1. Populus (Tourn.) L. 



a. Styles dilated ; scales glabrous or with a very few hairs ; capsules 4-8 mm. in diam., 

 subglobose or ellipsoid, maturing after the first leaves are mature ; buds glutinous ; 

 leaf blades deltoid or ovate. 

 b. Petioles flattened. 

 c. Leaf blade mostly deltoid, often subcordate; teeth large and hooked, especially 

 at the leaf angles ; petioles with 2 glands at upper end. 



1. P. balsamifera 

 c. Leaf blade rhombic or rhombic-deltoid; teeth small, more uniform, scarcely 

 hooked; petioles without glands. 2. P. nigra, var. italica 



b. Petioles terete or grooved. 

 c. Leaves ovate, glabrous or finely and sparsely pubescent, the base acute, rounded, 



or subcordate. 3. P. tacamaltacca 



c. Leaves broader, more rounded in outline, pubescent with coarser and usually 

 longer hairs, the base more deeply cordate ; teeth coarser. 



4. P. candicans 

 a. Styles linear or filiform; scales silky; capsules 1-3 mm. in diam., narrowly conic, 

 maturing with or before the first leaves; buds not glutinous or scarcely so; leaves 

 ovate or rounded. 

 b. Petioles strongly flattened laterally ; mature leaves glabrous ; buds and one-year- 

 old twigs not white-tomentose. 

 c. Leaves crenate-serrulate, glabrous when young ; buds, twigs, young foliage, 

 and capsules glabrous, often shining. 5. P. trcmuloides 



