252 :\ii:uKiiJ.. 



others previously known only t'loni IJonico. Bornean types, considering 

 the proximity ol' the rhili])iiiiics Id that larp' island, are rather rare in 

 the Arehi])elag(>. Wliltrln'iid's plants lia\e hccn ((Hisidcrcd hy Ixciidk'.- 



Most t>i' the species collected hy W'liiieJwad on llalct)n were also Ijrought 

 in l»v me on the expedition under discussion. Hugh ('iiniin;/ collecteil 

 in .Miniloro, between the years 183() and 1840. He nndoiilitfdly woi-keil 

 in the vicinity of Calapan and on tlie P)aco Uiver, at the north base of 

 Ilalcon. a]thou,u-h lie ])rol)ah!y did not ])enetrate far into ihe interior 

 of the island, ('iniiiinj. in most cases, did not ,i;'ive localities for his 

 I)lants ; he was never moi'e delinite than to give the province or island, 

 so that we are not ahsolutely eeilain as to just wliat ])arts of Mindoro 

 he visiteil. In 1!M);? and 19(lo 1 made shoi-t eollei-ting ti-i])s up the Haco 

 iiiver. and in 1!M).") Mi-. /,'. ('. Mc(lrr(/oi\ of this Bureau, collected a con- 

 siderahle nund)er of plaids in the same region. In June, 190G, Mr. 

 M. L. Merriti. of the Philippine Forestry Bureau, accompanied Lieut. 

 T. II . Jennin<js on his attt'iupt to ascend Ilalcon. The ]»arty reached an 

 altitude of 7,250 feet and hrought in 1G5 numbers of plants representing 

 about 150 species. The plants collected hy myself in November, 190G, 

 are represented by 742 numbers and comprise about 600 distinct species. 

 The greater part of this material was gathered within a period of thirty 

 days, from November 2 to December 2, 1906, under very unfavoral)le con- 

 ditions. 'J^lie weathei'. nearly every day, was more or less rainy, and for 

 thirteen days in succession, while the party was at and above an altitude 

 of 4,500 feet, the rain did not cease day or night. As a result of these 

 conditions much of tlie collecting was accomplished in the wet. and all 

 specimens were of necessity dried by means of lire. ^laterial once dried 

 could only with difficulty be preserved, and constant alertness was needed 

 to protect oiw collections against moisture wbeu we were in camp, while 

 |)acking and moving in the poui-ing rain, and as we were foi'ding streams. 

 The material secured by ^\v. Merritt was ])repared under scarcely more 

 favorable cii'cumstaiices. 



The present ])apcr is based on the jilants collected by Mr. Merrill 

 and on those secured by myself, 271 s])ecies and varieties being consid- 

 ered; these are distributed into s;5 families and KI.S genera. Two genera 

 are ))r()posed as new and two families are added to the number pi'cviously 

 known from the Philippines, one of these. < 'cnlrolc/iiddccir being (piile 

 new to the Ai'chipelago, and one. I ridmcd'. was previously known to he 

 i'e|)r(!sented in the l'hili])pines only by introduced and cultivated s|)ecies. 

 Seven genera ami (ifteen species are reported from the l*hili|)]»ines for 

 the first time, while thirtv-nine species ai'e described as new. The above' 

 summary is based only on the material coiisidered in the present paper. 

 The vascular cry|)togams collecled on Ilalcon by me have already been 



'Jotini. Uul. (18!)(i), 34, ;!.").-)-:{.")S. 



