MELANTHACE FROM THE GENETIC STANDPOINT. 15 
5. TOXICOSCORDION ARENICOLA, Heller, in Muhlenbergia, ii. (1906) 182. 
Inyo Co., California, Washoe Co., Nevada. ; 
This is a segregate from T. venenosum. The bulbs are broadly ovoid, 
clothed with dark brown outer coats. The leaves about half the length 
of stem. Inflorescence at first short and dense, becoming 1-2 dm. long ; 
pedicels very slender, spreading and ascending ; bracts membranous, 
acuminate ; perianth white, segments faintly 3-toothed at the apex and very 
short-clawed, with a small, yellow, orbicular, fimbriate gland just above 
the claw. 
6. Toxicoscorpion NurrTALLI (A. Gray), Rydb. 
T. Nuttall, Rydb. in Bull. Torr. Bot. Club, xxx. (1903) 272. 
Amianthium Nuttallii, var. a, A. Gray, in Ann. Lyc. N.Y. iv. (1837) 123. 
Amiantanthus Nuttallii, Kunth, Enum, Pl. iv. (1843) 181. 
Anticlea Nuttallii, Torr. Pacif. R. R. Rep. iv. (1856) 144. 
Zigadenus Nuttallit, A. Gray, Man. ed. 2 (1857) 476; Gartenfl. xxxii. (1883) 163 
t 1121 172. 
Helonias angustifolia, Nutt. in Trans, Am. Phil. Soc. v. (1837) 154. 
Colorado, Kansas, and Arkansas. 
Bulb with blackish skin, white within, sepals variable, gland small, 
roundish, without distinct margin. 
1. Toxicoscorpion Fremontit (Torr.), Rydb. 
T. Fremontii, Rydb. in Bull. Torr. Bot. Club, xxx. (1903) 273. 
Zigadenus speciosus, Dougl. ex Hook. Fl. Bor. Am. ii. (1840) 177. 
Z. glaberrimus, Hook. & Arn. Bot. Beechey Voy. (1843) 160. 
Z. Douglasit, Torr, Pacif. R. R. Rep. vii. (1856) 20, 
Z. Fremontüi, Torr. ex S. Wats., Bot. King's Exped. v. (1871) 343. 
Z. glaucus, Nutt. ex Baker, in Journ. Linn. Soc., Bot. xvii. (1879) 480. 
Anticlea Fremontii, Torr. Pacif. R. R. Rep. iv. (1856) 144. 
California. 
Sepals not clawed, 5-7-nerved, gland irregular-margined above ; stamens 
half as long as the perianth. 
v, 
ToxicosconprioN Fremont (Torr.), Rydb., var. MINOR (Hook. & Arn.), comb. 
nov. 
" Zigadenus chloranthus, a, minor, Hook. & Arn. Bot. Beechey Voy. (1841) 402. 
Z. commutatus, Schult, Syst. Veg. vii. (1830) 1561. 
Z. speciosus, var. minor, Greene, Man. Bay Region, (1894) 315. 
Z. Fremontii, var. minor, Hook. & Arn, fide Jepson, Fl. W. Mid. Calif. (1901) 129. 
Smaller in every part. This is an early dwarf form, 4 or 5 inches high, 
with few flowers, in open wet ground near the coast (Jepson, Fl. 122). 
8. TOXICOSCORDION ExALTATUM (Eastw.), Heller. 
T. exaltatum, Heller, in Muhlenbergia, vi. (1910) 83. 
Zigadenus exaltatus, Wastw. in Coult. Bot. Gazette, xli. (1906) 283. 
