6 MKlUilLl.. 



noted above that about 26 species of this family^ found in the Philippines, 

 are of American origin; it is worthy of note that but 5 of these liave 

 been found in Polillo. The fact that there are so few of these American 

 plants definitely known from Polillo, leads us to conclude also that many 

 of the other species, now cosmopolitan in the tropics, abundant in other 

 parts of the Philippines, but wanting in Polillo, have been introduced 

 into the Archipelago in comparatively recent times, perhaps contem- 

 poraneously with the introduction of many of the%.merican species, and 

 like the latter have not as yet reached the isolated parts of the Archi- 

 pelago. 



Some cases of geographical distribution are worthy of note, but evi- 

 dence of special affinities with the flora of surrounding regions is not as 

 strong in this family as it is in some others. The flora as a whole is 

 preponderatingly Malayan. Excluding from the present consideration 

 the species that manifestly liave been introduced from tropical America, 

 and are now for most part widely distributed in Indo-Malaya, we have 

 about 150 common to the Philippines and the Malayan region; of these 

 about 120 are common to India, the Philippines, and Malaya, and many 

 also extend to other regions. About 31 are confined to the Philippines 

 and Malaya, but less than one-half tliis number are common to con- 

 tinental Asia and the Philippines and do not extend to Malaya. « 



The following species extend fromjfnorthcrn India to China and the 

 Philippines: Desmodiuni podocarjmm DC. (also in Japan), D. retro- 

 ficxmn DC, Indigofera nigresccns Kurz, Lespedeza juncea var. sericea 

 Forbes & Hemsl. (also in xiustralia), Shuteria vestiia W. & A., and 

 Smithia ciliata Eoyle. From northern India and the Philippines, but 

 not reported from China, we have: Dolichos falcatus Klein, Crotalaria 

 acicularis Ham. (also in Java)., Desmodiuni pseudotriquctriLni DC, and 

 Croialaria assamica, while the genus Kingwdendron has one species in 

 India, and one in the Philippines. Confined to China and the Philip- 

 pines we have PhaseoluLS minimus Eoxb., while Glcditsia roJfei Yid., 

 Luzon and Celebes, and the only representative of the genus in Malaya, 

 is closely allied to species of southern China, the genus not being repre- 

 sented in India except by introduced species. A considerable number of 

 the above continental types are confined to the Benguet-Lepanto region 

 in northern Luzon, in the regional distribution of Puius insidaris Endl., 

 but others are widely distributed at low altitudes. Acacia confusa Merr., 

 wliieh has been identified by some authors with A. richii A. Gray, of 

 Polynesia, is the only species, known to me, common and confined to 

 Luzon and Formosa; however, this species must be considered an Aus- 

 tralian type as. it is one of the few extra-Australian species of the great 

 group Fhyllodineae so characteristic ■ of that continent. Desmodiuni 

 buergeri Miq., a Japanese species now reported from Die Philippines, 

 has been confused with J), lirlcroairpimi (L.) DC, so tliat its exact 

 ranjje is uncertain. 



