184 Trans. Acad. JSci. of St. Louis. 



cells much larger than the epidermal. Procambial elements 

 are well developed, with well formed spiral ducts. Cells of 

 the cotyledons contain an abundance of starch and protein 

 but little fat. 



ViCIA AMERICANA, Muhl. 



PI. XXVI. f. 1-1 c. 



Testa and endosperm greenish-brown, somewhat glossy, 

 160-175 fjL thick ; Malpighian cells 55 /x long, irregular with 

 conical points; cuticle thick, upper part colored brownish; 

 light line a distinct zone below the brown portion. When 

 treated with f uchsine the light line stands out as a nearly color- 

 less zone. With chlor-iodide of zinc the walls color bluish- 

 black except the light line, which takes on a lighter blue color. 

 The cell-cavity is wide at the base but becomes narrow below 

 the light line. Several conspicuous pores extend into the 

 walls from the cuticularized layer. Cells contain tannin and 

 chromatophores. The osteosclerids are 20-30 /jl long, I-shaped. 

 Prominent longitudinal pore-canals occur in the hilar region : 

 in this region more than one layer of cells occur. Cells con- 

 tain much tannin. Nutrient layer green; pigment occurs in 

 masses or apparently as distinct grains. The lower part of 

 this layer is without pigment. Nutrient layer is followed by 

 what appears to be the nucellus. A single layer of cells next 

 to the embryo is certainly endosperm. The cotyledons have 

 a yellow color but when mounted in water lose this color. 

 The cells of the first row in the cotyledons are nearly isodia- 

 metric, followed by larger cells, with intercellular spaces, hav- 

 ing pore-canals in the walls. Palisade cells absent. Cells of 

 cotyledons contain an abundance of starch and protein and 

 some fat. — (Pullman, Washington, Lake and Hall, Mo. 

 Bot. Gard.) 



Lathyrus, Tourn. 



Many of the species carry a brown pigment with a well- 

 developed testa. Endosperm much reduced or wanting. 

 Schleiden and Vogel record its occurrence for L. tingitanus 

 and its absence from L. tuberosus, Chalon records it as absent 

 from the genus. His conclusions were based on the study of 

 eight species, including those studied by Schleiden and Vogel. 



