
Refugium Botanicum.| [July, 1872. 
TAB. 320. 
Natural Order LinIaAcez. 
Tribe YuccoIpE. 
Genus Yucca, Linn. 
Y. auortosa (Linn. Sp. Plant. p. 456). Longe caulescens caule 
smpe ramoso, foliis 100 vel ultra dense rosulatis lanceolatis 
rigide coriaceis rectis facie prorsus concavis superne plicatis 
viridibus junioribus glauco tinctis 2—2} pedes longis medio 
218 poll. latis apice brunneo-pungentibus marginibus inte- 
gris brunneo-lineatis, perianthi subgloboso-campanulati ex- 
trorsum rubro tincti 2i—8 pollicaris segmentis oblongis 
cuspidatis, filamentis puberulis apice incrassatis uncinatis 
ovario ampulleformi superantibus, stigmatibus lgulatis apice 
emarginatis ovario triplo brevioribus.—Redouté, Lil. t. 826—T ; 
Bot. Mag. t. 1260; Kunth, Enum. iv. 278. 
A native of the Southern United States. 
Stem reaching many feet in height below the leaves, often 
branched. Leaves a hundred or more in a close tuft, lanceolate- 
lorate, two to two and a quarter feet long, two and a half to three 
inches broad at the middle, narrowed gradually upwards to a 
brown pungent point, and downwards to fifteen to eighteen lines 
above the base, vertically plicate in the upper part, rigidly 
coriaceous, all straight, the face more or less concave throughout, 
the entire edge marked by a distinct brown line. Scape much 
longer than the leaves. Panicle subdeltoid, four to five feet deep, 
the branches not downy, the lower pedicels twelve to fifteen lines 
long. Perianth two and a half to three inches deep, longer than 
broad when expanded; both sets of segments oblong-cuspidate, 
the inner fourteen to sixteen lines broad, the outer rather 
narrower, tinged with red down the back. Filaments puberulent, 
curved and thickened at the apex, ten to twelve lines long, 
exceeding the flask-shaped ovary, sometimes overtopping the 
stigmas, which are ligulate, three to four lines long, emarginate 
only at the apex. 
Tas. 320.—1, whole plant, reduced. 2, leaf; 8, branch with 
flowers; 4 and 5, segments of perianth ; 6, pistil and stamens: all 
natural size. 7, stamen; 8, pistil; 9, horizontal section of ovary: 
all magnified.— J. G. B. 
