DEATH CAMAS SPECIES, ZYGADE1STUS PANICULATUS. 



are scythe-shaped, all sheathing, roughish on both sides, rather thick, 

 6 to 12 inches long, and one-third to two-thirds of an inch wide. 

 The stems are stout, erect, and 1 to 2h feet high. The flowers are in 

 panicled racemes, and consist of six segments with membranous 

 bracts; the upper segments are deltoid, acute, or acuminate, with a 

 short claw and glands at base not definitely margined. The flower 

 segments are one-sixth to one-fourth of an inch long and are free 

 from the 3-celled ovary. The ovary is cylindrical and one-half to 1 

 inch long. The stamens are raised above the flower segments. 



This plant is largely confined to the Great Basin. (Fig. 1.) Its 

 known range is from the British Columbia line in the Cascades south, 

 in Washington, along 

 the eastern side of the 

 Cascade Range to 

 northwestern Cali- 

 fornia, where for a 

 distance it crosses to 

 the western side of the 

 Sierra Nevadas. 1 1 

 follows the eastern 

 slope of the Sierra 

 Nevada Mountains to 

 the southern extremity 

 of Nevada. It ranges 

 eastward across south- 

 ern Washington and 

 central Idaho to west- 

 ern Montana, thence 

 across southwestern 

 Wyoming to north- 

 eastern New Mexico 

 and northern Arizona. 

 It ascends on the 

 British Columbia line to about 7,000 feet and in the Wasatch Moun- 

 tains to about 8,500 feet. In California it is found above 2,700 feet. 

 Its best habitat is the dry gravelly ridges of the juniper-pinon-oak belt. 



Because of the wide range of conditions under which the plant 

 grows, its time of flowering varies. It is said to blossom in California 

 from April to June. Near the Salina Experiment Station, Utah, 

 where it grows at an altitude of more than 8,000 feet, it does not 

 blossom until June and is in seed the last of the month. 



EXPERIMENTAL FEEDING. 



In 1919, 1920, and 1921, 7 experimental feedings of Z. 'paniculatus 

 were made on cattle and 44 on sheep. Table 1 gives a summary of 

 these experiments. 



Fig. 1. — Distribution of Zygadcnus paniculatus. 



