SILVA OF NORTH AMERICA. 
LILIACE. 
YUCCA ALOIFOLIA. 
Spanish Bayonet. 
Ovary stipitate. 
Yucca aloifolia, Linneus, Spec. 319 (1753). — Miller, 
Dict. ed. 8, No. 2.— Walter, Fl. Car. 124. — Aiton, 
Hort. Kew. i. 465. — Salisbury, Prodr. 246. — Willdenow, 
Spec. ii. pt. i. 184. — De Candolle, Pl. Hist. Succ. i. t. 
21. — Michaux, Fl. Bor.-Am. i. 196. — Persoon, Syn. i. 
378. — Desfontaines, Hist. Arb. i. 18.— Du Mont de 
Courset, Bot. Cult. ed. 2, ii. 201. — Pursh, £7. Am. Sept. 
i. 228. — Redouté, Liliacées, vii. t. 401, 402. — Bot. 
Mag. xii. t. 1700. — Tussac, Fl. Antill. ii. 108, t. 29. — 
Nuttall, Gen. i. 218. — Haworth, Suppl. Pl. Suce. 32.— 
Sprengel, Syst. ii. 41. — Roemer & Schultes, Syst. vii. pt. 
i. 716; pt. ii. 1715. — Paxton, Mag. Bot. iii. 25, t.— 
Dietrich, Syn. ii. 1093. — Kunth, Hnum. iv. 270. — Spach, 
Hist. Vég. xii. 283. — Regel, Gartenflora, viii. 34. — 
Chapman, 7. 485. — Curtis, Rep. Geolog. Surv. N. Car. 
1860, iii. 94.— Engelmann, Trans. St. Louis Acad. iii. 
34.— Hemsley, The Garden, viii. 131, f.; Bot. Biol. Am. 
Cent. iii. 369. — Baker, Gard. Chron. 1870, 828, f. 154 ; 
Jour. Linn. Soe. xviii. 221; Kew Bull. ALisc. Informa- 
Leaves serrulate, slightly concave, smooth, dark green. 
251. — Trelease, Rep. Missouri Bot. Gard. iii. 162 ; iv. 
182, t. 18, f. 1-3. — Webber, Rep. Missouri Bot. Gard. 
vi. 93, t. 45, 46, 47, £. 1-4. 
Yucca serrulata, Haworth, Syn. Pl. Succ. 70 (1812).— 
Roemer & Schultes, Sys¢. vii. pt. i. 716. — Kunth, Hnum. 
iv. 270. — Regel, Gartenjlora, viii. 35. 
Yucca crenulata, Haworth, Suppl. Pl. Succ. 33 (1819). — 
Roemer & Schultes, Syst. vii. pt. i. 717. — Kunth, Enum. 
iv. 271. 
Yucca arcuata, Haworth, Suppl. Pl. Succ. 33 (1819).— 
Roemer & Schultes, Syst. vii. pt. i. 717. — Kunth, Hnum. 
iv. 271. | 
Yucca tenuifolia, Haworth, Suppl. Pl. Succ. 34 (1819). — 
Roemer & Schultes, Syst. vii. pt. i. 717. — Kunth, Hnum. 
iv. 271. — Regel, Gartenjlora, viii. 35. 
Yucca serrulata, a vera, Regel, Gartenflora, viii. 35 
(1859). 
Yucca serrulata, 8 robusta, Regel, Gartenfloru, viii. 35 
(1859). 
tion, January, 1892, 7.— Watson, Proc. Am. Acad. xiv. 
A tree, occasionally twenty-five feet in height, although usually much smaller, with a single erect 
or more or less inclining trunk, which is slightly swollen at the base and is simple or produces two or 
three short erect branches, rarely more than six inches in diameter, or with several spreading stems, and 
a long stout caudex. The leaves, which clothe the stem to the ground while the plant is young, are 
erect and rather remote except at the apex, where they are closely imbricated into a dense cluster ; and 
in old age only the base of the trunk is covered with thick rough dark brown bark, while the scars left 
by the falling leaves mark the remaining portion where it is not hidden by the withered decumbent 
leaves which press closely against it and usually do not fall until many years after their death. The 
leaves are linear-lanceolate, ridged, and conspicuously narrowed above the broad thin light green base 
which is from an inch and a half to two inches broad and marked with a red transverse band ; they are 
widest above the middle, slightly concave on the upper surface, finely and irregularly serrate with 
minute dark cartilaginous obtuse teeth, mucronate with a stout stiff dark red-brown spine-like tip one 
third of an inch im length, smooth dark rich green, from eighteen to thirty-two inches, but usually 
about twenty-four inches long, and from one and a quarter to two and a half inches wide. The flowers 
appear from June until August in nearly sessile glabrous or slightly pubescent panicles from eighteen to 
twenty-four inches in length; their bracts are ovate or oblong, acute, mucronate, thick, white, leathery, 
and glabrous, and wither without falling, the largest being four or five inches long and often an inch 
wide, while those at the base of the pedicels toward the ends of the branches of the panicle are not more 
than half an inch long and an eighth of an inch wide; they are borne on stout pedicels from one to 
two inches long, and vary from an inch to an inch and a half in length, and when expanded during the 
night are from three to four inches across. The base of the perigone is greenish and sometimes 
flushed with purple ; its segments are ovate, and thick and tumid toward the base; those of the outer 
