288 BLAKE: REVISION OF MAHOGANIES 



Honduras. It is now known in the wild state from Tabasco 

 and Campeche to eastern Guatemala and Honduras, and is 

 evidently the only species of the genus on the eastern coast of 

 Central America. 



Swietenia candollei, recently described by Pittier,^" is pre- 

 sumably the only species of Swietenia native in Venezuela. It 

 is easily distinguished from 5. mahagoni by its much longer 

 leaflets and larger flowers, and from 5. macro phylla by its longer 

 petiolules and obtuse capsules. 



A fifth species, not hitherto described, is represented in the 

 National Herbarium by fine flowering material collected in 

 Michbacan by Nelson, and by foliage material collected in Sinaloa 

 and Oaxaca. This species has the subsessile leaflets which dis- 

 tinguish 5. humilis from all other Swietenias hitherto described, 

 but these are much larger than in that species and are provided 

 with a very long twisted cusp formed by the excurrent midvein. 

 To it evidently belong the specimens mentioned by Harms as 

 grown at the Botanic Garden of Victoria in Camerun, from seeds 

 collected by Preuss in Kl Salvador. 



An interesting account of the history of the three species of 

 mahogany previously recognized has been published by R. A. 

 Rohe in a recent number of the Kew Bulletin, ^^ with references 

 to illustrations and to much of the literature relating to the sub- 

 ject. 



The distribution of the five species of Swietenia now known may 

 be summarized as follows : Swietenia mahagoni is the only species 

 known from the West Indies, Bermuda, and the Bahamas, 

 as well as the keys of southern Florida. It has been introduced 

 into Trinidad, Venezuela, and the Hawaiian Islands, and is 

 recorded by Casimir DeCandolle from Peru, but the latter record 

 is certainly very questionable. Swietenia candollei is a native 

 of Venezuela. Swietenia macrophylla is the mahogany of the 

 eastern coast of Central America, from Tabasco to Honduras, 



10 Joum. Wash. Acad. Sci. lo: 33. 1920. 



11 Kew Bull. 1919: 201-207. 1919- 



