( 2094 ) 



Berckheya uniflora. One-flowered 

 Berckheya. 



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Class and Order. 

 Syngenesia Polygamia Frustranea. 



Generic Character. 



Receptaculum favosum. Semina villosa. Pappus palea- 

 ceus (nunc sctoso-paleaceus ciliatus). Cat. l-pjhyllus : foliolis 

 imbricatis tectus Brown. 



Specific Character and Synonyms. 



Berckheya uniflora ; foliis alternis lanceolatis spinoso-den- 

 iatis subtus tomentosis, caulc herbaceo unifloro, calycinis 

 squamis lanceolatis spinoso-serratis radium subasquan- 

 tibus. Willd. Sp. PL 3. p. 2274. Pcrsoon Syn. 2. p. 481. 



Rohria monanthos ; foliis ellipticis subtus tomentosis, caly- 

 cimis foliolis lanceolatis ciliato-spinosis. Thunb. Prodr. 

 140. Act. Soc. Nat. Serut. Hafn. 3. p. 102. t. 7. 



The genus Berckheya was established by Fred. Ehrhart, 

 in honour of J. F. Van Berkiiey, author of a learned treatise 

 on the structure of compound flowers, antecedently to the 

 name of Rohria by Thunberg, which it has accordingly 

 superseded. 



In one circumstance this plant does not altogether corres- 

 pond with the above generic character; the leaflets of the 

 calyx being divided quite to the base, but in other respects it 

 agrees well. The seeds are sunk in the cells of the recep- 

 tacle, are covered with long white hairs, and crowned with 

 a pappus, consisting of a regular row of lanceolate paleae, 

 which are longer than the seed. The interior row of the 

 leaflets of the calyx are narrow -lanceolate, quite entire, erect, 



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