36 DR. I. B. BALEOUK OX THE GENUS PANDANUS. 



of the plants he put in these genera. Certainly the male flowers 

 of Barrotia diodon, Graud. {Pandanus furcatus, Roxb.), do not 

 correspond with the type described by Brongniart. Brongniart 

 seems to have had some misgivings about putting his New-Cale- 

 donian species under the genus Bryantia, and constitutes a sub- 

 genus Lophostigma to include them. 



I have no doubt, then, that all those genera I have mentioned 

 may be referred back again to the one genus Pandanus, the de- 

 finition of which, however, must be considerably altered from that 



commonly given. 



The genus contains, as I have said, a number of species which 

 are distributed throughout the tropics of the Old World. Some 

 few species, however, do extend beyond tropical boundaries. The 

 genus runs through a great extent of longitude. A few species 

 are found on the east coast of Africa ; and thence it stretches 

 eastward through the Mascarene Islands, India, and the Indian 

 archipelago and Australia, until its eastern limit is reached about 

 the Sandwich Islands. In fact, the species are found more or less 

 between 30° N. and 30° S. latitude, and 158° E. and 18° W. 

 longitude. Throughout this range there seem to be two areas 

 of distribution, one with its centre in the Mascarene Islands, and 

 the other in the Eastern archipelago ; and the species of each 

 area do not commingle. It is worth while mentioning, as I have 

 not seen it noticed elsewhere, that it is a common feature of the 

 species of the Mascarene area to have red spines on their leaves, 

 though this is not the case in all ; whilst in the species from 

 the Eastern area, so far as I know them, those with red spines 

 on the leaves are the exception. Further, I may notice that in no 

 species of the Mascarene area with red spines have I found the 

 spines on the leaf-edges or midrib recurved ; whilst in the white- 

 spined species of the Eastern area this recurvation is common. 



Regarding the species, the nomenclature is at present in a 

 state of great confusion. This is due in great part to difficulties 

 of identification, but also greatly to the multiplication of names 

 resorted to by horticulturists ; and another great source of con- 

 fusion has been introduced in the retention by recent writers 

 on the group of some ante-Linnean names. In the following 

 list I have given all the names of species I have been able to find, 

 quoting the authority and giving a reference to where it may be 

 found. Of many I know nothing save the name ; and it may be 

 taken for granted that a great number have no claim to be species ; 



