and on various Plants related to them. 325 



in determining from mature specimens whether the anthers are uni- or bi- 

 locuiar, admitting the term biioeularity as it is commonly used. For, though 

 the appearance of the apex of the male column, especially of the inner faces of 

 its teeth or lobes (which are by no means always emarginate), is in favour of 

 the anthers being bilocular, yet the furrows visible on the column are equal in 

 number to the loculi ; and the disposition of the vessels that appear to belong 

 more directly to the stamina is also that which ordinarily, I think, obtains 

 with unilocular anthers. The same, perhaps, may be said of the appearances 

 presented by a transverse section of the antheriferous part of the column. 



Obs. IV. — The stigmatic tissues are highly developed, consisting of very 

 long, nucleary cells, arranged over the whole surface of each lobe of the frame- 

 work, as it may be called, each of which communicates freely with the canal 

 of communication. In this part of its organization this species presents curious 

 analogies with Euhalus. Jussieu suggests an affinity with Hydrocharidece, 

 op. cit. p. 73. in observ. 



The structure of the ovula with reference to the direction of the apex of the 

 nucleus is only determinable in my specimens at a very early period, when the 

 prominence of the nucleus on the same line with the ovulum and funiculus is 

 easily observable. This prominence soon disappears, the mature ovula look- 

 ing hke clavate truncate bodies. Of their internal structure I ascertained 

 nothing ; nor was I able to satisfy myself of any separation whatever of parts. 



§ 4. AsARINE^. , 



Thottea, Rottb. in Dansk. Vidensk. Selsk. Schrift. nye iSaml. ii. 530. t. 2. ex 

 Endl. Gen. Plant. 345. no. 2164. 



Perianthium campanulatum, aequale, 3-partitum. Stamina circiter 35, biseriatim circa co- 

 lumnam verticillata. Ovarium 4-loculare ; stigma discoideum stellato-lobatum. Fructus 

 siliquiformis, 4-valvis, filis repliformibus totidem interjectis. Placenta libera, tetragona. 

 Semina uniseriata, rugoso-papillosa. 



Frutex humilis, aromate et habitu Anonaceo. Folia magna, oblonga. Racemi e caulis parte 

 inferiore foliis denudatd. Flores amplissimi, penduli, conspicue venosi, extus hamoso- 

 strigosi, intus arachnoidei. 



Thottea grandiflora, Rottb., loc. cit. 



Descb. Frutex 3-4-pedalis, satis robustus, apice parce ramosus ; ramulis pubescentibus. 



