19t) 



National Herbarium) ; Glencoe, Minnesota (P. major, T. J. M., Aug. 1, ISMO, 

 Herbarium of the University of Minnesota) ; Cambridge, Massachusetts (Keller- 

 man, July 5, 1878, Herbarium of J. M. Coulter). 



Between P. major and P. Rugelii are found a number of intermediate forms 

 which are difficult to classify except in fruiting stage. 



** Leaves lanceolate to linear, not strongly veined, thick and rough. 

 t Leaves smooth, scape smooth or slightly hairy. 



4. P. eriopoda Torr. — 50 mm. to 150 mm. high ; usually having a mass of 

 yellowish wool at the base ; leaves ovate to lanceolate, thick, rough, three to seven 

 nerved, obtusely or acutely pointed, tapering gradually into a short, margined 

 petiole, margins entire; spike 25 mm. to 125 mm. long, cylindrical, densely or 

 loosely flowered; scape 100 mm. to 300 mm. long, smooth or hairy; sepals 

 ovate, scarious (Plate 4) ; capsule ovoid, slightly exceeding the calyx, circumscis- 

 &ile below the middle, from 2-4 seeded ; ripe seeds black, surface dull, striated 

 longitudinally; cross section oval (Plate A., Fig. 4j; longitudinal section oval 

 (Plate D.", Fig. 4) ; size, 2^ mm. x 1 mm. ; hilum at center of seed. 



An exceptional form found at Evaston, Utah (G. W. Letterman, National 

 Herbarium), is 200 mm. high; has thin leaves; scape 425 mm. long; spike 

 150 mm. long; petioles nearly as long as the leaves. 



Moist and saline soil, from Minnesota to California and the lower St. 

 Lawrence. 



Specimens examined : Rimouski County, P. Q. (J. A. Allen, August 5, 1881, 

 National Herbarium); Kearney County, Nebraska (P. A. Rydberg, June 25, 1891, 

 304 National Herbarium); Nicollett's Northwestern Expedition (C. A. Geyer, Jufy 

 16, 1839, 276, National Herbarium); Montana (L. F. Ward, 1883, National Her- 

 barium); Han's Fork, Wyoming (L. F. Ward, 1881, National Hebarium); Gotten- 

 burgh, Nebraska (Sandberg Collection, June 19, 1889, Herbarium of the Uni- 

 versity of Minnesota); Oak Wood Lakes, Dakota (Sandberg Collection, June 4, 

 1892, Herbarium of the University of Minnesota); Brookings, South Dakota 

 (E. N. Wilcox, May 19, 1891, National Herbarium); Western Dakota (Sandberg 

 Collection, Herbarium of the University of Minnesota); Ruby Valley, Nevada 

 (S. Watson, August, 1868, 740, alt. 6,000 ft., National Herbarium); Hayden's 

 Gulch, Granite, Colorado (P. Patagonica, var. nuda, Mrs. S. B. Walker, 1890, 

 544, National Herbarium); Ft. Bridger, W^yoming (Porter, July,- 1893, National 

 Herbarium). 



tt Leaves and scape slightly pubescent. 



5. P. decipiens Barneoud. — 50 mm. to 200 mm. high ; leaves linear, chan- 

 nelled, acuminate, erect, three or five veined, margins entire; spike slender,. 



