TREM ANDREW 205 



each cell attached close to the apex of the axile placentas. The 

 raphe is ventral. There are three genera belonging to the 

 order ; one, Tetratheca, includes twenty species, the ovaries of 

 which have from one to three ovules in each cell. When there 

 are two they are superposed, but the third one is collateral. 

 The fruit is a capsule dehiscing along the middle of each 

 carpel, and the seeds have a shell-shaped twisted aril-like 

 appendage at the chalaza. The testa is crustaceous, and in 

 Tetratheca and Tremandra sparingly pilose. The seeds of 

 Platytheca galioides are solitary in each cell and smooth. 



The embryo is close to the hilum and embedded in a 

 moderately hard endosperm, with the radicle superior ; it is 

 usually very small. 



The Tremandrese are slender, much branched shrubs, with 

 alternate, opposite or whorled, narrow, and sometimes Heath- 

 like leaves. 



POLYGAEE/E. 



Benth. et Hook. Gen. PI. i. 134. 



Fruit and Seed. The pistil is superior, syncarpous, two- 

 celled, consisting of two carpels. Exceptions to these general 

 characters occur in Xanthophyllum with a one-celled ovary 

 and parietal placentas, while there is only one carpel in 

 Securidaca, several species of Monnina, and Krameria. In 

 Trigoniastrum the ovary is three-celled, and in Moutabea 

 often three- to five-celled. Typically the two cells each con- 

 tain one ovule suspended from the top of the cavity; two 

 collateral ovules occur in Krameria ; and from two to six in 

 Xanthophyllum. The pendulous and anatropous character is 

 constant. 



The fruit is capsular and loculicidally, rarely septicidally, 

 dehiscent, or is dry or baccate and indehiscent. That of 

 Securidaca and Trigoniastrum is a samara, that of Carpo- 

 lobia and Mundtia a drupe. The fruit of Xanthophyllum, 

 Moutabea, and Krameria is globose and indehiscent. That 

 of Krameria, though primarily two-ovuled, is one-seeded 

 and spiny or muricate. The seeds are pendulous, with a 



