Pammel — Jbiatomical Characters of Seeds of Lecjuminosae. 181 



dark-colored varieties, contain a great deal of pigment and 

 tannin . Starcli grains 14-26 /a in diameter. In V. Michauxii, 

 Spr., Malphigian cells 56.8 /U, long, upper part colorless. 

 Osteosclerids 10-12 /x long. Cells of cotyledons somewhat 

 elongated, containing oval, spherical, or ovate starch grains, 

 11-18 /x in diameter. The seeds of several species are of 

 economic importance as food. 



ViCIA SATIVA, L. 

 PI. XVI. f. 1-2. 



This species has been studied by Harz, Tschirch and Oest- 

 erle, Beck, and Sempolowski. Testa irregular, with small 

 projections, 126 /u, thick. Endosperm reduced to a single 

 layer. The presence of endosperm has been indicated by the 

 above writers. Beck speaks of an aleurone spot (Aleurone- 

 fleck) in the epidermal cells of the cotyledons of this and 

 other species of the genus Vicia, 



Mal])igliian. Cells 72-75 /x long, pointed at the upper end ; 

 cuticle very irregular because of the projections ; cuticularized 

 layer most prominent in the depressions ; pores project into 

 the walls below the light line, and partly connect with the 

 cell-cavity ; the upper part of the cell is not pigmented, or 

 very little. The light line occurs just above the pigmented 

 part of the cell. Cell-cavity is large at the base, narrows 

 upward, becoming much constricted below the light line, and 

 above widens again. Small lateral projections or pores extend 

 into the wall at right angles to the cavity. A large chromato- 

 phore, some pigment, and small granules occur in the cavity. 

 The walls in lower part of cell are colored bluish-brown. 



Osteoscleind. Cells are thick-walled, 13-16.8 /u- long, longi- 

 tudinally striated. Upper and lower cross-bars nearly equal ; 

 the intercellular spaces elongated. Tschirch and Oesterle 

 state that this layer is not very strongly developed, but in 

 specimens which I have examined it is well developed. These 

 cells are more or less variable, as indicated by Harz, who states 

 that they are from 11-13 /^ long. 



Nutrient. This layer is differentiated into two parts; the 

 upper consists of thin-walled, elongated cells with a yellowish 

 pigment ; the cells of the lower part are larger, thin-walled 

 and elongated, containing a brown pigment. 



