DE CANDOLLE'S PRODROMUS. 23 



however bounded, which includes the Justicia pedunculosa 

 and J. humilis of Michaux. 



The remainder of the volume, contributed by Schauer of 

 Breslau, comprises, first, Phrymacece^ another of these incon- 

 venient little orders established on a single genus of a single 

 species, which, however, differs remarkably from Verhenacem 

 as well as Lahiatcje^ by the monomerous ovary, with a single 

 orthotropous ovule erect from the base of the cell, an embryo 

 with the radicle superior, and convolute cotyledons ; and 

 finally, the Verhenacece, composed of three tribes (the Ver- 

 henece^ Vlticece, Avicenniece)^ ten subtribes, and forty-two gen- 

 era. The genus Verbena, with which we are principally con- 

 cerned in the United States, comprises seventy-one species, 

 besides a dozen dubious ones appended at the close. 



We had nearly forgotten the small family Myoporacece^ 

 which is elaborated by Professor Alphonse De Candolle him- 

 self. These twelve genera are all Australian or Oceanic, 

 except Bontia, which is a Caribbean genus of a single species. 



The twelfth volume, which will contain the Labiatm by 

 Bentham, is promised for June. 



The twelfth volume of the " Prodromus," delayed somewhat 

 by the convulsions of the continent, will be welcome to bot- 

 anists. It concludes the series of 3Ionopetalce^ with the ex- 

 ception of the small family Plantaginacem^ and the large one 

 of Solanacece^ which last, Professor Dunal — from whom it 

 has long been due — appears to find by no means easy to elab- 

 orate. Of the present volume, all but one hundred pages are 

 occupied by the Lahiatce^ from the hand of the most unwearied 

 and best of monographers, Mr. Bentham. The plants of this 

 large order, arranged in 101 genera, are thrown into eight 

 tribes, instead of the eleven in the " Labiatarum Genera et 

 Species ; " the Satureiece now being made to comprehend the 

 Mentlioidem and the Melissinece of the earlier work, and the 

 Scutellarinece being merged in the Stachydece. The Ocimoi- 

 dece.) comprising nineteen genera, are represented in extra- 

 tropical North America solely by one or two species of 

 Hyptis, which inhabit our southeastern frontiers. 



Of the SatureiecB we have Mentha, Lycopus, a single Cu- 



