OF ARTS AND SCIENCES. 251 



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. aloifolia, Linn. Cauclex 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. 34. T. 

 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. Yucatana, 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. Guatemalensis, 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. 



■h- ++ Margin of the leaf entire (often serrulate when young or sparingly fila- 

 mentose when old). 



2. Y. gloriosa, 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, 1^- 

 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. T. acuminata, Sweet, Fl. Gard. t. 195. T. 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). 



