Mitri 

 «W5, and Ruhia. 



The ovary is 2-3.celled in Siphomeris and in one species of 

 Rutidea, and by exception the same increase in the usual number 

 of cells is said to occur in Pentas, Tricalysia, and Pentanisia, and 

 it is 2-4-celled in Cephaelis. It is 3-celled in BicJiardia, 4-celled 

 in Morelia and Morinda, and very rarely so in one species of 

 Pavetta, 3-5-celled in Stipularia, Vangueria.Fadogia, and Cuviera, 

 4-5-celled in TTrophyllum and Salicea, 5-celled in Temnopteryx, 

 Pentalonclia, and AncylmitJios, 5-7-celled in Triainolems. 10-12- 



<r 



252 ME. W. p. HIEEN ON THE PECCTLIABITIES 



been regarded as conspecific unless some good botanical character 



or marked difference in general aspect fairly separated them ; it 



is quite possible that some of my species will subsequently 



require division, and, on the other hand, when fuller material is 



available, some of my specific distinctions will perhaps be found to 

 be bridged over. 



Oeganic Pecultaetties. 



In order that it may be easy to form an opinion as to the com- 

 parative value of the various characters, I here give a general ^ I 

 view of the more conspicuous differences which Tropical African 

 Eubiacese, whether in the tribes, genera, or species, present in each 

 of the organs and in some of the morphological or physiological 

 conditions. 



1, As to the Flowers, 



The flowers, at least within our geographical range, with the 

 sole exception of the common Levant weed Vaillantia hispida, 

 appear to be uniformly hermaphrodite ; even though the genus 

 Psychotria has, in the New World, some species with polygamo- 

 dioBcious flowers, none of our species possess this peculiarity. 



2. Frequency of Dimorphism. 

 Dimorphism occurs commonly or at least in some species in | 



the genera Pentas, Virecta, Otomeria, and Dirichletia, all of which { 



belong to the tribe Hedyotidese, also in Penta?iisia ; perhaps a ' 



like condition exists in some species of Tricalysia and probably 

 also in pther genera. 



3. Differences in the Pistil. 

 The ovary is usually 2-celled, but in many genera deviations, 



either occasional or characteristic, occur ; it is only l-celled in 



Gardenia, but incomplete partitions are found in this genus, due 



to the production of 2 or more parietal placentas ; it is also some- 



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