

Refugium Botanicum. | (July, 1872. 
TAB. 316. 
Natural Order LintacEm. 
Tribe YuCCcOIDER. 
Genus Yucca, Linn. 
Y. acuminata (Sweet, Brit. Flow. Gard. t. 195). Vix caulescens, 
foliis 50—60 dense rosulatis anguste lanceolatis rigide cori- 
aceis facie prorsus concavis nullo modo recurvatis 18—2é4 poll. 
longis medio 18—24 lin. latis apice pungentibus marginibus 
integris brunneo-lineatis, perianthii albidi purpureo tincti 
globoso-campanulati segmentis exterioribus lanceolatis, inte- 
rioribus oblongis duplo longioribus quam latis, filamentis 
puberulis apice incrassatis uncinatis ovario ampulleformi sub- 
equilongis, stigmatibus ligulatis apice emarginatis ovario 
duplo, brevioribus.— Kunth, Enum. iv. 274. 
A native of the Southern United States. 
Scarcely caulescent, quite hardy in the neighbourhood of 
London. Leaves fifty to sixty in a dense rosette, reaching 
eighteen to twenty-four inches long, eighteen to twenty-one lines 
broad near the middle, narrowed gradually upwards to a hard 
brown pungent point, and downwards to one-half to five-eighths 
of an inch above the base, as rigid in texture as those of gloriosa, 
deep green, with a slight glaucous tinge when young, the face 
more or less concave throughout, the entire edge marked with a 
distinct brown line, all ascending or spreading, none recurved. 
Panicle oblong-lanceolate, with several short ascending branches. 
Perianth two inches deep, cream-white, tinged with purple 
towards the tip, rather longer than broad when fully expanded ; 
the outer segments lanceolate, five-eighths to three-fourths of an 
inch broad, the inner oblong, seven-eighths to one inch broad at 
the middle. Filaments three-fourths of an inch long, puberulent, 
hooked and thickened at the tip. Ovary flask-shaped, scarcely 
as long as the filaments. Stigmas three-eighths of an inch long, 
heulate, emarginate at the apex. 
Tas. 316.—1, whole plant, reduced. 2, leaf; 3, branches with 
flowers; 4 and 5, segments of perianth ; 6, ovary and stamens: all 
natural size. 7, stamen, magnified.—J. G. B. 
