A PRELIMINARY REVISION OF PHILIPPINE MYBTACELSJ. 333 



species, as yet represented by sterile or incomplete material, may further 

 add to the list of genera. 



The material examined has consisted of the entire herbarium of this 

 Bureau and occasional other sheets of recent collection. This has in- 

 cluded practically all of Cuming's numbers in this family: two important 

 collections practically unknown to me are those of Vidal and Loher, 

 the former especially interesting as often indicating his ideas as to the 

 identity of certain of Fernandez- Villains determinations. These, it is 

 understood, were made from probability and memory, rather than from 

 direct comparisons. 



A considerable number of specimens from other closely related regions 

 are also in this herbarium, and direct comparison has often enabled the 

 solution of questions that would otherwise have been held in abeyance. 

 Most frequently the decision thus readied has been that the Philippine 

 species has to be considered distinct: in several critical cases, I have not 

 yet been able to make direct comparison with the species supposed to be 

 most closely allied. I have to further gratefully to acknowledge as- 

 sistance from W. W. Smith, Esq., of the Eoyal Botanic Garden, Calcutta, 

 J. II. Maiden, Esq., of the Botanic Gardens, Sydney, Australia, and 

 Doctors Treub and Valeton, Buitenzorg, Java. 



KEY TO THE PHILIPPINE GENERA OF MYBTACE.E. 



Fruit a capsule. 

 Petals separate. 



Leaves opposite 2. Mearnsia 



Leaves alternate. 



Flowers axillary, solitary, or rarely in three's at the apex of short lateral 



branches G. Leptospennum 



Flowers in umbels or panicles. 



Stamens free 3. Xanthostemon 



Stamens more or less united 4. Tristania 



Petals united into an operculum 5. Eucalyptus 



Fruit indehiscentj leaves opposite. 



Corolla wanting 1. Osbornia 



Corolla present. 



Ovary-cells 4 or 5 8. Decaspermuvi 



Ovary-cells 1 to 3. 



Leaves glabrous 10. Eugenia 



Leaves pubescent. 



Under surface of leaves white-tomentose 9. Rhodomyrtus 



Leaves not white-tomentose 7. Psidium 



1. OSBORNIA F. Muell. 



Osbornia octodonta F. Muell. Fragm. 3 (1862) 31. 



Luzon, Province of Tayabas, Laguimanoc, Vidal 315; Pitogo, For. Bur. 10231 

 Curran: Province of Camarines, Ragay, For. Bur. lOJflG Curran. Negros, Prov. 

 of Negros Occidental, Cadiz Nuevo, For. Bur. Jf219 Everett. Basilan, Hallier 

 s. n.: Palawan, Malampaya Bay, For. Bur. Jf.'/OO, 7/(53 Curran. 



