ERRATA, ALTERATIONS AND ADDITIONS. 
VOL. XXII. 
pp. 184, 185. Put the expressions marked (8),(9),(B),(C), each=0. 
VOL. XXIV. 
rd 
Pp: 44, lines 18 and19. For c=r?dv, c’=r/2dv &c., read c= a 
Ps &c. p. 300, lines 3, 4, 5. For the first member of the 
sentence beginning, ‘A quantity, &c.’ read, The increments of two 
quantities whose rates of increase are different in kind, let those in- 
crements be ever so small, cannot be compared together. 
In binding, place Dr. Hare’s plates, as esi evolution of silicon, now facing 
face p. 248; that on the evoluti ron, which is the eet ne 
now stand, must face p. 250; that a the ae cock, the third as they now stand, to 
ce p. 251. Page 237, line "2 from the top, dele an nd. 
. 
2 VOL. XXV. 
Page 73, April 20, for Cynoglossum, read Onosmodium hispidum ; May 2, dele 
all ja this head and substitute drgemone mexicana, var. albiflora, b. rd BP, 75, 
another whorl of ore If this hypot = be ass vam! Be Pade oe know that this 
~ plant will bs found to be more than a variety of Argem na. 
0 ~s acre . New pers of plants,” p. 77, add the | following. 
i dactyloides, and T. monestachyon. 
On cask age ne ar. New bern, and on Cape Fear River, near Wilmington. 
The: r the name of “Gama grass,” have lately acquired, in the 
South, raaibie pea ag ae are beginning to be cultivated as a provender for 
horses and other cattle. Their product is said to be very great. 
Elliott’s description . dactyloides is defective and erroneous. It is as follows: 
“Spikes numerous, (3-4,) aggregate,” —and in the extended deseription, “ Flowers 
in eget spikes ; i peer three to four, (when four, beichiater opposite ?) Mery 3 
wers on one (the in nterior) side. Fertile florets two to four, at the of the 
s dese scription might be given more correctly thus: “Flowers in terminal 
Fe ions central spikes (those the stem) aggregate, two to four; bearing flowers, 
metimes ately on t es, sometime one (the exterior) side. Fertile 
rets two to eight, at the base of the spike, &c.; spikes of the ) 
solitary, somewhat cylindrical.” (Precisely similar to those of ) 
his last circumstance, which has not been noticed by botanical writers, tends to 
con icion, entertained by Pursh, that these are — ab 
er ee . Should this opinion sige ong rear 
abolition specific names become necessary, I wou! id suggest mo substitute 
Tripsacum heterostachyon, in allusion to the diversity of its spikes. 
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