158 DR. R. R. GATES: A STUDY OF NORTH AMERICAN 
California. 
This is said "by the author to be the largest species of Zigadenus and to be 
related to 7. paniculatum in habit and size of bulb, but the flower parts are 
of different shape. 
9. ToxICOSCORDION BREVIBRACTEATUS (M. E. Jones), comb. nov. 
Zigadenus Fremontii, var. brevibracteatus, M. E. Jones, Contrib. West. Bot. xii. (1908) 78. 
Z. brevibracteatus, Hall, in Univ. of Cal. Publ., Botany, vi. (1915) 165. 
Victor, Calif., and along the southern borders of the Mohave Desert. 
Differs in having very narrow leaves, small flowers, ample compound 
racemes, stout horizontal pedicels 25-40 mm. long, and ovate-lanceolate 
bracts. "This is a desert species. 
10. ToxrcoscoRDION PANICULATUM (Nutt.), Rydb. 
T. paniculatum, Rydb. in Bull. Torr. Bot. Club, xxx. (1903) 272. 
Helonias paniculata, Nutt. in Journ. Philad. Acad. vii. (1834) 57. 
Amianthium Nuttallii, var, B, Gray, in Ann, Lyc. N.Y. iv. (1887) 123. 
Zigadenus iculatus, S. Wats. in Bot. King’s Exped. v. (1871) 343. 
£ 
Z. Nutta, var. paniculatus, Baker, in Journ. Linn. Soc., Bot. xvii, (1879) 481. 
Montana and Washington to New Mexico and California. 
Distinguished, according to Rydberg, by its “stout habit, generally 
branched inflorescence, and rhombic-ovate, acute, and almost clawless petals 
and sepals.” 
11. Toxicoscorpion rALcATUM, Rydb. 
T. falcatum, Rydb. Bull. Torr. Bot. Club, xxx. (1903) 272. 
Zigadenus falcatus, Rydb. l. c. xxvii. (1900) 536. 
Colorado. 
The following specimens in Herb. Missouri Bot. Gard. are referred to this 
species : Canon City, Colo., 24, T. S. Brandegee, May, 1871. Fort Collins, 
Colo., C. S. Crandall, May 17, 1894 (cotype). Denver, Colo., E. C. Smith, 
May 21, 1891. Near Fort Collins, C. F. Baker, May 24, 1896. 
Said to differ from 7. paniculatum in the distinctly clawed petals, which 
are subcordate at base. “These characters, together with the more distinct 
glands and the slightly adnate filaments, distinguish it from T. Nuttalli.” 
12. ToxtcoscorDION MICRANTHUM (Hastw.), Heller. 
T. micranthum, Heller, in Muhlenbergia, vi. (1910) 85. 
Zigadenus micranthus, Easvw. in Bull. Torr. Bot. Club, xxx. (1903) 483. 
Mendocino Co., California. 
It is very doubttul if this differs from the true 7. venenosum. 
13. TOXICOSCORDION TEXENSE, Rydb. ex Small, Fl. S.E. Un. St. (1903) 
252, 1328. 
Texas. 
