1. Leaves mostly basal; spike subtended by an involucre; western Oklahoma and 

 Texas westward I. Anemopsis 



I. Leaves all cauline; spike naked, not subtended by an involucre; eastern Okla- 

 homa and Texas eastward 2. Saururus 



1. Anemopsis H. & A. 



A monotypic genus. 

 1. Anemopsis califomica (Nutt.) H. & A. Verba mansa. Fig. 377. 



Plant forming colonies, usually about 3 dm. tall; stems nodose, scapelike, from 

 aromatic creeping rootstocks; leaves mostly basal, those on the stem subtended 

 by a sheathing bracteose leaf, elliptic-oblong, truncate or cordate at base, to 15 cm. 

 long, with the petiole about as long as the blade; spike conical, 1.5-4 cm. long, 

 subtended by a whorl of white or reddish bracts; most of the flowers subtended 

 by a white obovate clawed bract; ovary sunk in the rachis of spike; fruit a cap- 

 sule. Incl. var. subglahra Kelso. 



In alkaline or saline soils of wet meadows, flats and along streams in n. w. 

 Okla. (Woods Co.), w. to s.w. Tex. (El Paso Co.), reported from Hemphill and 

 Lubbock cos. in the Panhandle, widespread in N. M. (Bernalillo, Dona Ana, 

 Grant, Hidalgo, Otero, San Miguel, Sandoval, Sierra, Socorro and Valencia cos.) 

 and Ariz. (Cochise, Pima and Yuma n. to Coconino cos.), May-July; from Calif, 

 and Ariz., n.e. to cen. Colo, and e. to w. Okla. and Tex.; also n. Mex. 



2. Saururus L. 



Another species occurs in eastern Asia. 



1. Saururus cernuus L. Lizard's-tail. Fig. 378. 



Plant forming colonies, to about 9 dm. tall; stem naked below, leafy above, 

 simple or branched; leaves cauline, cordate-ovate, the veins converging, to 15 cm. 

 long, much longer than the petiole; stipules indistinct; spike to 3 dm. long and 15 

 mm. in diameter, peduncled, wandlike, naked, pubescent, curved-nodding at tip; 

 flowers white, crowded, provided with a small bract that is adnate to or borne on 

 the pedicel; stamens with long slender filaments; pistils (carpels) united at base; 

 stigmas recurved; fruit somewhat fleshy, wrinkled. 



In water or muddy soils of lakes, swamps and streams in e. Okla. (Adair, 

 Le Flore, McCurtain and Muskogee cos.) and e. and s.e. Tex., May-Aug.; from 

 s.w. Que. and s. Ont., s. to Fla., w. to Minn., 111., Mo., Kan., Okla. and Tex. 



Fam. 43. Salicaceae Mirb. Willow Family 



Shrubs or trees with soft light wood, bitter bark and simple alternate deciduous 

 stipulate leaves; stipules deciduous or persistent; dioecious (sexes on separate 

 plants); flowers in aments (catkins) which fall off as a unit (the staminate after 

 shedding pollen, the pistillate after ripening and dispersal of seeds); flowers sub- 

 tended by a single scalelike bract; stamens 2 to many; fruit a 1 -celled capsule, 

 2- to 4-valved, containing numerous seeds that are surrounded by a tuft of long 

 silky white or tawny hairs that arise from the base; style 1, rarely wanting; stigmas 

 2 to 4, sometimes 2-lobed. 



A family containing only the following two genera, both of which are widely 

 distributed but most abundant in North Temperate and Alpine-Arctic regions. 



I . Buds with several imbricated scales, often resinous; floral bracts lacerate, cadu- 

 cous; flowers borne on a shallow or cup-shaped disk; stamens 6 to 

 60; capsule 2- to 4-valved 1. Populus 



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