A REVISED LIST OP THE BRITISH CARYOPHYLLACE^. 429 



mens under this name seem to belong to C. tetrandnun, yet Sar- 

 dinian specimens of Cerastlicni pentandrum Mor. (non Linn.), and 

 Sicilian specimens gathered sufficiently far from localities with 

 sandy soil, closely agree with specimens of the English plant. 



30. Malackiwn aquaticuiii. — An earlier name is Myosoton aqiia- 

 ticum Moench (1794). 



32. Stellaria cerastoides. — I have followed Boissier and Enrico 

 Tanfani in restoring this species to Stellaria : but in Parlatore's 

 MS., utilized by the latter botanist in the compilation of the Flora 

 Italiana, it is described under Cerastium. 



41. Arenaria leptoclados. — M. Fran9ois Crepin has observed that 

 this plant, growing in similar localities to those where A. ser- 

 pijlUfoUa is found, seems quite distinct, and that its characters are 

 fixed and constant. 



46. Sagina Buijdii — It is probable that further examination 

 of living specimens of this genus will result in a satisfactory 

 reduction of species grouped under two types, with respectively 

 tetramerous and pentamerous flowers. 



47. S. apetala. — I have pointed out in this Journal (1890, 

 p. 294) that Arduino first named and described this species ; though 

 the correction is not noted in recent floras. 



56. Honckeni/a. — -This genus is so frequently maintained as dis- 

 tinct from Arenaria in different European floras, that it is desirable 

 that the alternative name for Honckenya, Willd. (a Tropical African 

 genus of Tiliacece) should be definitely substituted for it. One of 

 the species has already been named by Decaisne Clappertonia 

 Jicifolia, and I would propose for the other the name of C. minor 

 ( = H. minor BailL). 



59. Alsine rubella. — This plant is frequently cited (Nyman, &c.) 

 as A. hirta Hartm., but there is no reason for displacing the name 

 given to the plant by the botanist who re-established the genus. 



66. Spergularia rupicola. — This plant is certainly conspecific 

 with a Corsican sand-spurry, S. macrorrhiza Marsilly (not of Gren. 

 & Godr., as given in the Lidex Kewensis, who placed it in Spergula). 



By those taxonomists who do not regard the apetalous orders 

 as phylogenetically heterotypic and distinct from the polypetalous 

 orders, and have intercalated them with these to form the division 

 of Choripetalce, the genera included in lUeccbraceic have been placed 

 next to Caryoplujllacea. Some botanists, such as Prof. Ferdinand 

 Pax, in Engler and Prantl's Natarlicheii Fjlanzenfamilien, have 

 followed Endlicher in arranging these genera as subsidiary groups 

 of CaryophyllacecB. The character of free central placentation of 

 the contents of the ovary is generally recognized as one of primary 

 importance, but the systematic position of monochlamydeous genera 

 which are homotypic with the genera of Caryophyllacece is a matter 

 for further consideration. 



