OF ARTS AND SCIENCES. O51 
25. YUCCA, Linn. 
* Filaments obtuse, papillose ; anthers cordate-sagittate : ovary narrowly ob- 
long : stigmas more or less distinct, papillose. —§ Euyucca, Engelm. 
+ Fruit baccate, pendulous: seeds thick, rugose, not margined, with lobed or 
ruminated albumen. Mostly arborescent, with sessile panicle. 
++ Leaves serrulate. 
1. Y. ALorrortA, Linn. Caudex 6 to 12 feet high, simple or spar- 
ingly branched: leaves thick, very rigid, tipped with a stout brown 
spine, 1 to 2 feet long or more, by an inch or two wide: panicle with 
rather small triangular bracts, smooth: flowers 1} inches long; seg- 
ments ovate: stigmas sessile, short and thick, straight: fruit 6-sided, 
» 
3 or 4 inches long, acutish: seeds 3 lines broad, half as thick.— 
Ker, Bot. Mag. t. 1700; Engelm. Trans. St. Louis Acad. 3. 54. a 
Draconis, Linn.; Lindl. Bot. Reg. t. 1894; with longer and softer 
leaves. Y. conspicua, Haw., branching from the base, with softer 
green-pointed leaves. Coast region, from North Carolina to Ala- 
bama. The varieties are only known in foreign gardens, under 
various names. 
Dr. Engelmann describes two other species, — Y. YucatTana, from 
Yucatan, 20 feet high, branching from the base: leaves slightly rough 
on the margin, a foot long or more: panicle densely villous, with lan- 
ceolate bracts: perianth-segments ovate-lanceolate: stamens much 
shorter than the ovary,—and Y. Guarremaensis, Baker (Saund. 
Ref. Bot. t. 313), from Mexico and Guatemala, with scarcely pun- 
gent and slightly serrulate leaves 2} or 3 feet long, flowers 3 inches 
long with lanceolate segments, and a short thick ovary with deeply 
2-lobed spreading stigmas. 
++ ++ Margin of the leaf entire (often serrulate when young or sparingly fila- 
mentose when old). 
2. Y. cGLoriosa, Linn. Caudex 4 to 6 feet high or less, simple or 
sparingly branched: leaves straight and rigid, pungent, often folded, 
2 to 2} feet long, roughish on the back: panicle pedunculate, smooth 
or pubescent, 2 to 4 feet long, with broad lanceolate bracts: flowers 
cream-white, often greenish or reddish; segments ovate, acute, 1h 
inches long or more: stamens as long as the ovary: stigmas rather 
slender, at length divergent. — Ker, Bot. Mag. t. 1260; Engelm. 1. c. 
38. Y. acuminata, Sweet, Fl. Gard. t.195. Y. recurvifolia, Salisb. 
Parad. t. 31. Sea-coast, North Carolina to Florida; in cultivation 
under numerous names and in several forms (Baker, Saund. Ref. Bot. 
t. 316-321; Carr. Rev. Hort. t. 89, 104). 
Trans fm 
