414 NATURAL HISTORY OF PLANTS. 



thirty-four in the most complete -work on the family by Planchost 

 and Triana l published in 1861 and 1S62. These authors, who based 

 the classification of the Clusiacece on the conformation of the embryo, 

 added thereto twelve new genera, seven named by themselves : 

 Oxystemon, Pohjthecandra, Balboa, Œdematopus, Havetiopsis, Clusi- 

 ella, and Pilosperma, 2 and those previously proposed : Arrudea by 

 Cambessedes, Androstylium by Miquel, Discostigma by Hasskarl, 

 Montrouzeria by Pancher, and in addition the old genus Touralia of 

 Acblet and his Quiina which, some years previously, Tclasne 3 had 

 referred to this family. In 1862 Bentham and Hooker * reduced 

 the number of genera to twenty-four, by referring to other types 

 Arrudea, Oxystemon, Androstylium, Gochlanthera, Œdematopus, 

 Tovomitopsis, Discostigma, and Touralia. After them Oliver united 

 Calysaccion to Ochrocarpus 5 and created the abnormal genus Allan- 

 blackia. 6 As Calysaccion had been included in Mammea by Plan- 

 chon and Triana, the total number was then twenty-five. Hooker 7 

 joined to it Pceciloneuron, formerly considered a Ternstroemiacea* 

 By uniting Beuggeria, Beugifa, Havetiopsis, Œdematopus, and Balboa 9 

 to the true Quapoya, and by referring Xanthochymtis, as a simple 

 section, 10 to Garcinia, we have reduced the number of genera to be 

 retained to twenty-two, and we have indicated the possibility of a 

 still greater reduction by showing how little importance can be 

 attached to the characters by which the genera of the Symplwnia 

 series are distinguished from each other. 



The number of species known may be estimated at two hundred 

 and fifty ; they all belong to the warm countries of the globe and 

 scarcely if at all cross the northern tropic. In North America they 

 are found only in the warmest parts of Mexico. Of the twenty-two 

 genera, eleven belong to America, viz. : those of the Glnsia series, 

 Moronobea and Pkitonia, Mammea, and Quiina. Three genera, 

 Mesua, Kayea, Pceciloneuron, are exclusively Asiatic. Pentadesma 

 and All anblaclii a are from tropical western Africa; Montrouzeria, 

 from New Caledonia. Symplwnia, Galophyllum, and Rheedia, are 



1 Bull. Soc. Bot. de Fr. viii. 26, 66 ; Ann. Se. 5 II. Trop. A/r. i. 169 (186S). 



Nat. sér. 4, xiii. 306; xiv. 226; xv. 240; xvi. « B. H. Gen. 'JSO (1807). 



263. ' Ft. Brit. Ind. i. 278 (1874). 



" These two latter, several essential organs of 8 Sue vol. iv. p. 261. 



which are imperfectly known, are only doubt- 9 Bull. Sue. Liu». Titr. 77. 



fully admitted. l0 Following the example of Kurtz (Joui n. J s. 



3 Ann. Sc. Nat. sér. 3, xi. 156. Soc. Bemj. xxxvii. 01) and J. Hooker (up. cit. 



4 Gen. 167, 980, Ord. 27. 259). 



