
Refugium Botanicum. | [July, 1872. 
TAB. 317. 
Natural Order LInIAcE®. 
Tribe YUCCOIDE®. 
Genus Yucca, Linn. 
Y. Extacomser (Hort.) Breviter caulescens, foliis 40—50 dense 
rosulatis anguste lanceolatis subrigide coriaceis glauco-viridibus 
facie prorsus concavis nullis recurvatis 27—30 poll. longis 
medio 18—21 lin. latis apice pungentibus marginibus integris 
brunneo-lineatis, perianthii albi subgloboso-campanulati 23—8- 
pollicaris segmentis exterioribus oblongo-lanceolatis dorso 
rubro tinctis, interioribus oblongis, filamentis puberulis apice 
uncinatis incrassatis ovario unciali paulo brevioribus, stig- 
matibus ligulatis apice emarginatis ovario triplo brevioribus. 
Probably a native of the Southern United States. 
Shortly caulescent, quite hardy in the South of England. 
Leaves forty to fifty in a dense rosette, narrow-lanceolate, 
reaching twenty-seven to thirty inches long, eighteen to twenty- 
one lines broad at the middle, narrowed upwards to a brown 
pungent point, and downwards to one-half to five-eighths of an 
inch broad above the base, somewhat thinner than those of 
gloriosa in texture, all spreading or ascending, permanently 
glaucous, the face more or less concave throughout, not plicate, 
the entire edge marked with a distinct brown line. Scape 
equalling the leaves. Panicle a yard long by half as broad, 
moderately close; the lower pedicels an inch long. Perianth 
pure white, two and a half to three inches deep, rather longer 
than broad when fully expanded; the outer divisions oblong- 
lanceolate, tinged with bright red on the back, an inch broad; 
the inner oblong, fourteen to fifteen lines broad at the middle. 
Filaments puberulent, nine to ten lines long, thickened and 
curved at the apex. Ovary flask-shaped, nearly or quite an inch 
long. Stigmas ligulate, three to four lines long, emarginate at 
the apex. 
Taz. 817.—1, whole plant, reduced. 2, leaf; 3, branch with 
flowers; 4, pistil: all natural size.—J. G. B. 
