

264 BOTANICAL GAZETTE 



[APRIL 



coat; and (2) the outer integument (eight to ten layers thick) form, 

 the greatly differentiated outer layers of the coat. 



At maturity he found that the spermoderm consists of a compli- 

 cated structure with five distinct tissues, namely: (1) inner epithelium 



of the carpel; (2) outer and (3) inner integument; (4) perisperm; 



and (5) endosperm. These five in turn are subdivided into ten 

 layers, each one to many cells thick. About the edge of the seed. 

 between the fifth and sixth layers, runs the small raphe. 



This author divided the family into two large groups. In the 

 first belong those seeds with the 



firmlv 



ST ± • 



attached to the spermoderm, represented in his work by Cucurbita 

 Pepo and Lagenaria vulgaris. The second includes the species with- 

 out this epithelium, illustrated by Cucumis sativus. Otherwise there 

 are no great differences in development. 



In the same year, one month after the appearance of von Hohxel's 

 paper, Fickel 2 published his inaugural dissertation, describing the 

 seed coats of Cucumis sativus L., C. Dudaim L., C. myriocarpus 

 Naud., Cucurbita Pepo L., C. melanosperma A. Br., Lagenark 

 vulgaris Ser., Citrullus vulgaris Schrad., Benincasa cerifera Savi.. 

 Bryonia alba L., B. dioica L., Ecballium agreste Rchb., Sicyos angu 

 latus L., Cyclanthera explodens L., C. pedata Schrad., and Bryonopsis 

 erythrocarpa. He gives descriptions and cuts of the mature seed 

 coat and its development from the two integuments, and reaches the 

 following conclusions: (1) the seed coat has five layers; (2) the epi- 

 dermal cells are radially elongated and, with the exception of those of 

 Sicyos and Cyclanthera, have thickenings of various kinds on the 

 radial walls; (3) the second laver consists of one or more layers 01 

 cells varying in size and thickness of walls; (4) a third layer his 

 either radially or longitudinally elongated cells; and (5) the remain- 

 •ng layers are of compressed cells without definite structure. 



Godfrlnm briefly notes the seed coats of Cucumis sativus U 

 Cucurbita maxima Duch., Lagenaria vulgaris Ser., Sky** *»***"' 

 L., and Cyclanthera pedat ' ' """" * 



spermoderm is represented as ha 



,rad. In his general description^ 

 ving six lavers, as follows: (i)ep 1 



(2) small cells differing as to number, size, 



V. 4Et oo C histol °S'que sur les teguments serninaux des angiospermes. 

 ^ancy 1880:160. 



Soc. Sci 



