Morphologie und Teratologie. 391 



sont confondues. Cette premiere racine (ou radicule) est 

 pourvue dans l'embryon d'iine gaine de tissus (coleorhize) qui 

 est etiree, piiis dechiree au moment de la germination. 



C. Queva (Dijon). 



Gerber, C, Etamines carpellisees de la Giroflee. 

 (C. R. Acad. Sc. Paris. CXXXIX. 1904. p. 219—221.) 



On sait que la Giroflee cultivee transforme parfois ses 

 etamines en carpelles et qu' A.-P. de Candolle dans le 

 Prodrome, a eleve cette anomalie au rang d'une variete qu'il ä 

 nommee: Cheiranthus Cheiri L. var. /.. gynauthenis. 



En etudiant chez cette variete la structure des etamines 

 transformees, M. Gerber y a constate la presence du faisceau 

 renverse caracteristique de la fausse cloison des Crucißres, de 

 Sorte que l'etamine carpellisee differe de l'etamine normale par 

 l'adjonction au Systeme libero-ligneux de cette derniere des 

 faisceaux inverses caracteristiques du gynecee des Cniciferes. 



C. Queva (Dijon). 



Lang, W. H, On a Prothallus provisionally referred 

 to Psilotiim. (Annais of Botany. Vol. XVill. No. 72. 

 1904. p. 571—577. With plate XXXVII.) 



The prothallus was discovered by the author at Maxwell's 

 Hill inPerak in the M alay Peninsula, growing almost com- 

 pletely embedded amongst adventitious roots of PsiL trlqiietrum; 

 it was cylindrical in form and thickly clothed with rhizoids, 

 the larger part being of a brown colour. Below, and rather 

 to one side, it narrowed into a conical end which may be 

 compared to the primary tubercle of prothalli of Lycopodium; 

 the Upper sexual part consisted of a depressed area and a thick 

 overhanging fringe projecting outwards, in which numerous 

 antheridia were present; a meristematic zone occurred at the 

 base of the fringe. Assimilating lobes were absent and no 

 Chlorophyll corpuscles were found. 



The fringe was not equally developed all round but was 

 much hypertrophied in places. The antheridia originated in 

 regulär sucession, the youngest being next the meristematic 

 region; the first division separated an outer cell which forms 

 the wall, which, at maturity, is one layer of cells in thickness, 

 and the inner cell gives rise to the mass of spermatocytes. 



The vegetative portion contained an endophytic Fiuigiis 

 and could be divided into the following regions: a) the outer- 

 most layer of cells bearing the rhizoids and free from the 

 Fungus, save for filaments passing across from the bases of 

 the rhizoids; b) three to four layers of cells, each cell con- 

 taining a Single nucleus and filled with fine non-septate fungal 

 hyphae; c) a single layer of long narrow cells standing at right 

 angles to the surface and containing intercellular hyphae with 

 large oval vesicles which bulged out the septum where they 

 lay and often obliterated the lumen of the cell on one or on 



