382 LILIACEA. 
16. ZYGADENUS. 
Zygadenus, Michx. Fl. Bor.-Am. i. p. 218, t. 22 (errore Zigadenus) ; Benth. et Hook. Gen. Plant. 
iil. p. 835. 
Of this genus twelve species are enumerated, one of which is a native of Siberia, and 
all the rest of North America. 
1. Zygadenus mexicanus, Hemsley. 
Anticlea mexicana, Kunth, Enum. iv. p. 193 ; Baker in Journ. Linn. Soc. xvii. p. 483. 
Helonias virescens, H. B. K. Nov. Gen. et Sp. i. p. 267. 
Veratrum virescens, Mart. et Gal. in Bull. Acad. Brux. ix. (reprint, p. 10). 
Zygadenus volcanicus, S. Wats. in Proc. Am. Acad. xviii. p. 165, non Benth. 
Norty Mexico, region of San Luis Potosi 6000 to 8000 feet (Parry & Palmer, 892 ; 
Schaffner) ; Sours Mexico, Zimapan (Coulter, 1563), Cordillera of San Felipe, near 
Oaxaca, at 9000 feet (Galeotti, 5584; Andrieux, 70). Hb. Kew. 
2. Zygadenus porrifolius, Greene ex S. Wats. in Proc. Am. Acad. xviii. p. 166. 
NortH Mexico, in the Sierra Madre, south of Saltillo (Palmer, 1321). Hb. Kew. 
3. Gygadenus volcanicus, Benth. Pl. Hartw. p. 96; Kunth, Enum. iv. p. 198. 
Anticlea volcanica, Baker in Journ. Linn. Soe. xvii. p. 482. 
GuateMALa, Volcan de Agua at about 11,000 feet (Hartweg, 626). Hb. Kew. 
We have only seen the original specimen of this species, which is very distinct from 
Z. mexicanus, with which Watson has confused it. 
17. SCHCENOCAULON. 
Schenocaulon, A. Gray in Ann. Lyc. N. York, iv. p. 127; Benth. et Hook. Gen. Plant. iii. p. 836. 
A genus peculiar to the Texano-Mexican region and Georgia and Florida, of which 
five species have been described. 
1. Schenocaulon coulteri, Baker in Journ. Linn. Soc. xvii. p. 477. 
SoutH Mexico, Zimapan (Coulter, 1569). Hb. Kew. 
2. Schenocaulon drummondii, A. Gr. in Hook. et Arn. Bot. Beech. Voy. 
p. 388, in nota; Baker in Journ. Linn. Soc. xvii. p. 477; 8. Wats. in Proc. Am. Acad. 
xviii. p. 166. | 
Scheenocaulon teranum, Scheele in Linnea, xxv. p. 262. 
Trexas.—Norta Mexico, region of San Luis Potosi 6000 to 8000 feet (Parry & Palmer, 
882, fide S. Watson). 
38. Schenocaulon intermedium, Baker in Journ. Linn. Soc. xvii. p. 477. 
Nort Mexico, region of San Luis Potosi 6000 to 8000 feet (Parry & Palmer, 882) ; 
SoutH Mxxico, Zimapan (Coulter, 1568, 1570). Hb. Kew. 
Without any reference to Baker’s 8. intermedium, Watson identifies Parry and Palmer’s 
882 and Coulter’s 1570 with S. drummondii. Possibly S. intermedium may not be a 
