BOTANICAL GAZETTE. 277 
dehiscence of its capsule. The capsule of the former dehisces 
septicidally, while that of the latter opens by a little opereulum 
and then slits septifragally but in a rather irregular way. 
VII. Decopon Gmel. 
19. D. vervicintatus EIl. 1821: no. 315 of Koehn. Mon. 
i le. vol. iii. p. 342. (Lythrum verticillatum L. 1753: Anonymos 
aquatica Walter, 1788: Decodon aquaticus Gmelin. 1791: Nesea 
verticillata HBK. 1823.) From Canada and Wisconsin to Flor- 
) ida and Louisiana. Decodon could possibly be united with Hei- 
| mia (but not with Nesea), the capsule dehiscing in the same man- 
ner. Yet not only the different color of the petals and the dif- 
ferent disposition of the flowers, but also the near relationship 
of Decodon and Grislea and Adenaria have decided me in keep- 
ing them separate. The relationship between Decodon and Gris- 
lea secunda Loefl. is even greater than that between the former ~ 
Heimia, 
EXPLANATION oF PLATE VI.--In all the figures @ is the ovary stalk; 5, 
the insertion of the calyx; c, the base of the ovary; d, the hypogynous eshy 
ore é, capsule valves; A, the calyx; B, the ovary; C, the lower part of the 
the la 
Ree Fig. 6. L. Californicum, long-styled : 
g. 6. Pas eter taag wee 
styled (C, the longitudinal section, i the calyx with dehiscing fruit). 
Notes upon the Botany of the New Orleans Exposition. 
BY CHARLES E. BESSEY. 
Younger botanists to give this portion of the Ex 
or two of Piacrvation: It is impossible, and indeed it is not ris 
visable, to discuss fully the botany of the Exposition, but. ew 
i : d to visit New 
ord of the 
people. 3 ae 
of n the government building many of the States have ite 
t botanical specimens, evidently extracted from the herbaria © 
