to it by Mr. Kellock. It may, however, be pointed out 
here that this is not the only Zittaea presented to Kew under 
the name A. Leopoldi; as a matter of fact this plant, the 
A. Leopoldi of the ‘ Hand-list,’ was known in Mr. Kellock’s 
collection as A. Leopoldi No. Il., and the name has been 
provisionally restricted to the Littaea now figured because 
A. Leopoldi No. I. was found to agree with a plant already 
under cultivation under an older name. What the identity 
of ‘A. princeps, suggested as one of the parents of our plant, 
may be it has been impossible to ascertain, but the matter is 
not now of material consequence, since it is found, now. that 
the plant has flowered, that its characters negative the sug- 
gestion that it is a hybrid between any two of the Littaeas 
known to have been in cultivation in any part of Europe. 
On thé contrary these characters clearly point to its being a 
perfectly valid species and, although as to this there is not the 
same certainty, its characters suggest that it is probably a 
native of Central America. Like A. jilifera, A. disceptata 
produces suckers from the base of the stem, and like A. jilifera 
dias thriven well in the Succulent House at Kew under the 
conditions suitable for Agaves generally. Here it flowered, 
eighteen years after its presentation, in October 1911, and 
provided the material from which our figure has been 
drawn, and on which it has at last been possible to base a 
definite description. 
Descriprion.—Suceulent undershrub, stem very short, 
clothed with a dense rosette of leaves. Leaves fibrous- 
coriaceous, the outermost spreading but not recurved, the 
central straight ascending, the innermost somewhat incurved, 
passing gradually into the bracts, linear-loriform, the upper 
portion very gradually narrowed, the base thin, then 
suddenly swollen into a pulvinus, which is square below, 
ovate-lanceolate above, contracted into a neck about 2 in: 
above the base, at the apex, which is rather blunt, armed 
with a spine which is under } in. long, nearly 1 in. across 
at the base, about 4 in. wide at the neck and 2 in. wide 
higher up, the pulvinus about 4 in. thick in the middle, 
slightly convex, smooth and bright green on both surfaces, 
but in the upper portion and especially beneath irregularly 
marked with whitish streaks, the margin almost papery 
ultimately shredding into thin curled threads. Scape about 
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