102 MISSOURI BOTANICAL GARDEN. 
drooping one: and a sheet in the Engelmann herbarium 
with a similar leaf, two glabrous panicle fragments, and 
several detached flowers which appear to have come from 
them. Schott’s notes and sketches in the Engelmann 
herbarium show that the trunks were 1.75 to 2.5 m. high, 
the leaves about .3 m. long, and the panicle lax with pen- 
dent fleshy fruit. 
It has long been evident that if, as Dr. Engelmann 
thought doubtful, these fragments belong together, they 
represent a species very different from any Yucca which 
has been found by later collectors, and that the leaves can 
scarcely be compared closely with those of any recognized 
species, so that in August 1900, and April 1902, I took 
occasion to revisit the original localities, respectively a few 
miles to the eastward and a few miles to the westward of 
Nogales, where, as I had hoped, the species was found in 
abundance, though, as is usually true in such cases, vary- 
ing to a surprising extent from the original fragmentary 
material. 
Y. brevifolia, as it occurs rather sparingly in the canons 
of the Pajarito and adjacent ranges, to the westof Nogales, 
and abundantly among the low hills between that city and 
the Santa Cruz river, to the’ east, is most commonly cespi- 
tose and often acaulescent, though it not infrequently forms 
a trunk 1 to 1.5 m. high, and the thick apple green abun- 
dantly filiferous leaves, which are frequently falcately curved 
to one side, are usually about .75 m. in length, but vary in 
this respect, and especially in width, which, commonly 
about 20 mm., may reach 30 mm., or be reduced to 5 or 6 
mm. Unfortunately noneof the plants flowered in 1900 and 
my second visit was too early in the season, so that neither 
flowers nor good fruit could be obtained, but a few pan- 
icle remnants from previous years, branched rather loosely 
shortly above the leaves, — though not so laxly as is shown 
in the sketches by Mr. Schott, — glabrous, and showing 
where the fruits had disarticulated, leave little doubt that 
