352 



Saururaceae 



Saururus 



52. SAURURACEAE Lindl. Lizardtail Family 

 1856. SAURURUS [Plum.] L. 



1. Saururus cernuus. L. Common Lizardtail. Map 728. Infrequent to 

 frequent throughout the state in wet woodland, along muddy borders of 

 streams, and about ponds and sloughs. Where it is found it usually forms 

 almost a complete stand over the area. 



R. I. to Minn., southw. to Fla. and Tex. 



56. SALICACEAE Lindl. Willow Family 



Buds with several scales; leaves ovate or deltoid; bracts of flowers laciniate; disk 

 below each flower cup-shaped 1872. Populus, p. 352. 



Buds with a single scale; leaves lanceolate or narrower, rarely wider; bracts of flowers 



entire or subentire; disk below each flower consisting of one or more glands 



1873. Salix, p. 354. 



1872. POPULUS [Tourn.] L. Poplar 



Branchlets, outer bud scales, and lower surface of leaves white-tomentose; leaves more 

 or less lobed (rarely a branch with unlobed leaves and these usually with about 



7 coarse teeth ) 1. P. alba. 



Branchlets, outer bud scales, and lower surface of leaves not white-tomentose; leaves 

 never lobed. 

 Petioles rounded and more or less channeled above. 



Leaf blades 10-17 cm long, gradually narrowed toward the apex into an obtuse or 



merely acute point; pedicels of fruit usually 5-10 mm long. .2. P. heterophylla. 



Leaf blades 6-15 cm long; fruit nearly sessile or on pedicels up to 3 mm long. 



Blades typically ovate-lanceolate, whitish, waxy, glabrous or sparsely pubescent 



1 ciieath, usually acuminate at the apex; base acute, rounded or subcordate. 



3. P. Tacamahacca. 



Blades broader, mote rounded in outline, pubescent and usually with longer 



hairs; the apex usually acute; base more deeply cordate; teeth coarser 



3a. /'. Tacamahacca var. candicans. 



Petioles more or less flattened, especially near the blade. 



Tips of the branchlets curved upward (in winter phase); mature leaves broadly 

 deltoid and mostly more than 7 cm wide (or rhombic-ovate and cuneate at the 

 base) ; stamens 20 or more; capsules 4-8 mm in diameter 4. P. deltoides. 



