196 Trans. Acad. Sci. of St. Louis. 



testa of V. monachalis, according to Harz, measure 22-24 /u, 

 lono-, and 33-90 /u- in the hilar region. Osteosclerids are 13- 

 24 IX long. Endosperm usually wanting. Embryo contains an 

 abundance of starch and protein. The germination of Vigna 

 liUea, Gray and V. vexillata, Benth. were studied by Lubbock. 



Vigna Catjang, Walp. ( V. sinensis, L., Endl.) 



PI. XXXIII. f. l-lc. PI. XXXIV. f. 3. PI. XXXV. f. 9-10. 



This species has been studied by Mattirolo and Buscalioni, 

 Harz, Tschirch and Oesterle, and the writer. 



Malpighian. Cells 55-57 [x long, nearly colorless in some 

 varieties, in others with a bluish pigment ; light line close 

 under the poorly developed cuticularized layer ; cell-cavity 

 relatively large ; an abundance of tannin present. 



Osteosderid . Cells are I-shaped and somewhat widely sep- 

 arated by the elongated intercellular spaces. 



Nutrient. The cells of this layer have thin walls and are 

 much compressed. 



Endosperm. This is reduced to a single row of cells, the 

 aleurone layer. 



Embryo. The epidermal cells are smaller than underlying 

 parenchyma, and contain only protein. The cells of the second 

 row are somewhat larger, containing starch; intercellular 

 spaces at the angles of the cells. The parenchyma below 

 consists of large cells, their walls with pore-canals ; they 

 contain an abundance of large and small spherical or some- 

 what elliptical starch grains. Aleurone grains with one 

 globoid. The nucleus may be readily made out when treated 

 with iodine. Palisade cells are absent. 



Vigna glabra, Savi. 



PI. XX. f. 3. 



Testa spotted, 140-150 yt* thick. Malpighian cells are 74- 

 80 /A long. The light line occurs close under the cuticle. 

 Ppre-canals extend below the light line ; the cell-cavity con- 

 tracts rather abruptly. The osteosclerids are of the usual type, 

 I-shaped. The nutrient layer consists of five or more rows of 

 cells. The mycotic layer is very narrow. The endosperm is 

 much reduced, consisting of the well-defined aleurone layer. 

 Epidermal cells of the inner face of the cotyledons much 



