Addition to Artich on Agave. 
M3, . 7 o\~ { ' i - LL 
Additions and corrections have accumulated in the interval 
between printing and publication. 
N^age 29.3. The^words of the first note,(line 3, “whj 
end of 4 fie sentence should be cahsied up, into IJa^texf 
and aftdecNtp the first p^aghtph, line Sjjendmg^wkh the word 
Page 294. It requires further and extensive observations in the 
field and in the garden to ascertain the limits of variability of the 
edges of the leaf and its aculeate-toothed margins. Cultivators 
have already discovered considerable latitude in this respect in 
plants raised from seeds from the same parent. 
Page 302. Var. tigrina does not grow in salt-marshes, but 
was found by Dr. Mellichamp, “in one spot only, on a tongue of 
partly brackish land, extending out into the salt-mud and marsh, 
under dwarfed live-oaks, Cassine, and saw-palmetto, on the de¬ 
cayed shells, mixed with sand and earth, of what seems to be an 
old Indian oyster-heap” ! 
Page 304. A. falcata. The lately introduced A. Hystrix of 
the Belgian nurseries may have to be referred to this species; na¬ 
tive Country and flowers, as usual, unknown. 
Page 305. A. Schottii (better than Schotti, as printed). It 
is proper to add that A. geminijlora , ? Gawl., the Bonapartea 
juncea of the gardens, is a very different plant, and has nothing 
to do with Schottii , except that both belong to the same section 
of the genus. 
Page 310. A. deserti . In characterizing the foliage, I was led 
into the too common mistake of adopting the individual charac¬ 
ters of a single individual as those of the species. Full grown 
leaves are at least 15-20 inches long, and 2-3 inches wide above 
the base. The terminal spine is compressed and narrow-grooved 
only in the young, not fully developed leaf; in the adult it is ter¬ 
ete-triangular with a wide and shallow excavation above.—-The 
locality is Vallecito, not u Valcitron.” 
Page 314. A. S/iawii. To the liberality of Mr. Henry Shaw 
we are indebted for the fine’ photographs of this species which 
grace this number of our Transactions. They were taken by Mr . 
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