205 



to 100 mm. long, loosely flowered; scape 311 mm. to 150 mm. long, slender, spar- 

 ingly hairy ; sepals obtuse, scarious with a thick center (Plate 18) ; capsule short, 

 ovoid, obtuse, slightly longer than the calyx, circumscissile at the middle, 4 

 seeded.; ripe seeds light brown, surface dull, deeply pitted, cross section irregu- 

 larly and deeply lobed (Plate C, Fig. 1); longitudinal section irregularly lobed 

 (Plate F., Fig. 1) ; size. If mm. x J mm. ; hilum at center of seed. 



Dry, sandy soil, or damp places in western and southern United States. 



Specimens .examined : Shannon County, Missouri (B. F. Bush, April 13, 

 1889, National Herbarium) ; Nicollet's Northwestern Expedition (C. A. Geyer, 

 June 20, 1839, 279, National Herbarium) ; Western Klickitat County, Washington 

 (W. N. Suksdorf, April 26, 1883, National Herbarium); Lincoln, Nebraska 

 (Alton Collection, May, 1888, Herbarium of the University of Minnesota) ; Mus- 

 kogee, Indian Territory (M. A. Carleton, April, 1891, 64, National Herbarium) 

 lodan Valley, Utah (Sereno Watson, June, 1869, 749, National Herbarium) 

 Portland, Oregon (Drake and Dickson, April, 1887, Herbarium of J. M. Coulter) 

 East Hampton, Long Island (E. S. Miller, .June 2, 1877, Herbarium of J. M 

 Coulter) ; Oregon (T. Howell, April, 1885, National Herbarium) ; Georgia (T. C 

 Porter, 1847, National Herbarium) ; Dakota (Sandberg Collection, Herbarium of 

 the University of Minnesota) ; Springfield, Missouri (J. W. Blankinship, 1888, 

 National Herbarium) ; Montana (R. S. Williams, .June 25, 1883, 301, Herbarium 

 of the University of Minnesota); Arkansas (Sandberg Collection, April-May, 103, 

 Herbarium of the University of Minnesota) ; Seattle, Washington (P. Bigelovii, 

 E. C. Smith, June 21, 1890, National Herbarium); California (P. Bigelovii, M. 

 E. Jones, March 28, 1882, National Herbarium). 



16. P. heterophylla Nutt. — 25 mm. to 100 mm. high; leaves linear to fili- 

 form, smooth or slightly pubescent, margins entire; spike 6^ mm. to 50 mm. long, 

 loosely flowered, lower ones often scattered; scape smooth or slightly pubescent, 

 very slender, 25 mm. to 125 mm. long; sepals obtuse, scarious with a thick center 

 (Plate 19); capsule conical, nearly twice as long as calyx, circumscissile below 

 the middle, 10-28 seeded; ripe seeds light brown, surface dull, deeply pitted, 

 cross section irregularly and deeply lobed (Plate C, Fig. 2); longitudinal section 

 irregularly lobed (Plate ¥, Fig. 2) ; size f mm. x ] mm. ; hilum at center of seed. 



Low or sandy ground in western and southern United States. 



Specimens examined: Statesville, North Carolina (Sandberg Collection, 

 Herbarium of the University of Minnesota); Eastern Texas (Elihu Hall, April 

 10, 1872, 395, National Herbarium) ; Wilmington, California (C. G. Pringle, 

 March 31, 1882, National Herbarium) ; Aiken, South Carolina (W. M. Canby, 

 May, 1869, National Herbarium) ; Wilmington, California (C. G. Pringle, March 



