POLYGONUM Sp. 3. 

 PI. VI, fig. 15. 

 Nut ovate mucronate narrowed at base, compressed. 



Length 2.0 mm., breadth 1.6 mm. Reuver. 



A compressed and much decayed specimen, which may be only a badly pre* 

 served nut of the last species. 



CHENOPODIACEAE. 



The Cenfrospermae are poorly represented, we having seen only four specimens, 

 each belonging however to a different genus, and perhaps to a different family. 



GENUS? 

 PI. VI, figs. 16 a, b. 



Half a seed (which has germinated). 



Seed orbicular flattened, keel narrowly compressed, radially striated, hilum basal, 

 micropyle prominent. 



Length 3.0 mm., breadth 3.0 mm. Reuver. 



The large size and prominent micropyle make it improbable that this seed 

 belongs to Chenopodium ; its flattened form resembles Atriplex rather than one of the 

 Amarantaceae, but the keel and surface sculpture are peculiar. The poor preservation of 

 the only specimen leaves however the determination doubtful. 



APHANISMA? 

 PI. VI, figs. 17 a, b. 

 A minute strongly 5*ribbed fruit, apparently containing a single seed, suggests 

 the American genus Aphanisma, but in the absence of further specimens we cannot 

 examine its internal structure. 



Fruit minute globose somewhat depressed, with 5 strong ribs very prominent 

 below less prominent above. 



Length 1.5 mm., breadth 1.8 mm. Swalmen. 



NYCTAGINACEAE? 



PI. VI, fig. 18. 



Fruit inflated 5*angled, narrowed above into a long thick 5*angled style; base 

 surrounded by a cupule formed by the persistent perianth and bracts ; pedicel thick, 

 turned to one side; surface of nut rugose transversely below, striate longitudinally above; 

 bracts thick rugose transversely above and longitudinally towards pedicel. 



Length (including style and pedicel) 9.5 mm., breadth 5.0 mm. Reuver. 



The general character of this curious fruit would seem to place it in the family 

 Nyctaginaceae. It may be related to the South American Bourgainvillea. 



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