to expand only at night. It is a native of Mexico, having 
been introduced to the Horticultural Society, according to 
Dr. Linptery, some years ago by Sir Joun Lusgocs. 
Descr. Stem subglobose, depressed, and even umbili- 
cated at the top, about as large as a middling-sized orange, 
marked with several, twelve to fourteen, sharp and promi- 
nent angles, upon which are several white, rounded, woolly 
tubercles, mixed with several short and not very conspicuous 
spines. The flower is exceedingly large in proportion to 
the size of the stem, and breaks forth from one of the an- 
gles, ascending. Tube a span long, funnel-shaped, greyish 
green, woolly, and marked with numerous tufts of oblong 
brown hairs; within green. Petals numerous, lanceolate, 
very acuminate, white, patent, often reflexed. Stamens 
numerous, rising a little above the tube of the flower, most 
numerous on one side: Anthers yellow. Style scarcely 
reaching to the summit of the stamens. Stigma rayed. — 
