142 ACANTHASIA. 
sterile stamina. The nucleus appears to cohere with the 
single tegument. 
The direction of the flowers of Peristrophe before the 
twisting of the tube is, reasoning from analogy reversed: is 
the peduncle therefore twisted? I find in Meyenia and 
some others, that, if the situation of the inflorescence be 
such, that the upper labium be inferior or nearer the earth 
the peduncle becomes twisted. And this seems to be the 
cause of the twisting because in Thunbergia grandiflora 
when the situation of the upper lip is superior, as it sometime 
remains, no twisting takes place. 
It would be worth while ascertaining whether the twisting 
might not be determined in all by deflexing the inflores- 
cence so as to bring its point near the earth. 
The presence of three bractez to the flowers is constant? 
Aud points out the evident tendency to dichotomy that exists 
throughout the order, see N. ab. E. Of thesethe anticous one 
does not belong to the flower developed, for this being really 
terminal has ao bracte but to the partial ramus of inflores- 
cence, the lateral ones represent the situation of two lateral 
flowers not developed. "That is in the present instance but 
if the flower be pedicelled then the lateral ones would cor- 
respond to two lateral pedicelli. In the former case the 
limits of the partial inflorescences are defined, in the latter . 
they are not defined. 
GENDARUSSA, 
Gendarusse sp. 
Frutex erectus, ramis obsolete 4-gonis, atro-purpureis, fol. 
angusto-lanceolatis breviter petiolatis obtusis subemarginatis 
repando-crenatis. Spicis terminalibus et in axillis folior. 
summor. floribus termatim, aggregatis in axillis bracteam 
linearium, acutem dimiditem verticellat. albis, rubro pune- 
tat. lab. inferior rugosulo. Cal. 5-partit. sepal. zqualibus 
,subulat. Cor. bilabiata tubo compressa, lab. superiore lanceo- 
