Pammel — Anatomical Characters of Seeds of Leguminosae. 185 



In X. venosus aud L. maritwius the endosperm consists, of but 

 a single layer of cells. Harz indicates the presence of sojie 

 endosperm in parts of the seed of L. sativus. Starch is 

 abundant in all of the species. Huss studied L. Cicer, L. 

 pratensis and L. syJvestris with reference to the taking up 

 water by the cotyledons. Holfert studied the nutrient layer 

 of L. sylvestris. Good accounts of L. sativus, L. are given 

 by Tschirch and Oesterle, and Mattirolo and Buscalioni. 

 Strandmark gives a short account of L. latifolius. Analyses 

 of the chemical products of L. sativus are given by Konig 

 and Harz. 



Lathyrus venosus, Muhl. 



PL XVI. f. 6b. PL XXXIV. f. 1 . PL XXXV. f. 3. 



Testa 130-150 /* thick; endosperm much reduced. 



Malpighian. Cells 58-70 /x long. Cuticle somewhat un- 

 even. Cuticularized layer well developed ; the light line 

 occurs just below the latter; pores project into the walls 

 below. The walls are striated. Cell-cavity wide at the base, 

 and gradually tapering upward, then becoming constricted. 

 Lateral pores evident. Tschirch and Oesterle have called 

 attention to these in L. sativus. A single cbromatophore is 

 present in the upper part of the cell-cavity ; numerous small 

 grains in the lower part. Cells are pigmented. 



Osteosclerid. Length of cells varies from 19-50 /i ; inter- 

 cellular spaces elongated. I-shaped cells with upper and 

 lower bars nearly equal; cells thick-walled, elongated and 

 striated; they contain tannin and protein. 



Nutrient. This layer is much compressed. The cells are 

 elongated, thin-walled, with small intercellular spaces. Cells 

 contain an abundance of pigment and tannin. 



Nucellus. This layer is compressed and reduced. 



Endosperm. Layer is much reduced. Consists of a single 

 layer of thick-walled elongated cells, having a narrow cell- 

 lumen in which small protein grains occur. 



Embryo. Cells of the outer row small, having greatly 

 thickened exterior walls ; occasionally with some brown pig- 

 ment. The cells below are thinner walled and more loosely 

 arranged, with intercellular spaces. These cells contain some 

 pigment, protein, and a great deal of starch. The starch 



