Pammel — Anatomical Characters of Seeds of Leguminosae. 165 



Astragalus, Tourn. 



A considerable number of species have been studied by 

 Schleiden and Vogel, Huss, Nadelmann, Harz, Holfert, 

 Strandmark, Mattirolo and Buscalioui, Chalon and others. 

 The presence of endosperm has been noted by several ob- 

 servers, and in our American species, so far as I have studied 

 them, it is present. It is present in the European A. glycy- 

 pJiyUiis, A. lamosus, and A. Onyhrychis. The testa is well 

 developed. The osteosclerids are longitudinally striated in 

 some species. 



Astragalus mexicanus, A. DC. 



PI. XIII. f. 3-3b. 



Testa and endosperm 130-145 fx thick. Cotyledons 664- 

 830 /i across. 



Malpighian. Cells 70 fi long. Cuticle forms an even 

 layer; the narrow light line occurs under the light-colored 

 cuticularized layer; several pores project into the walls below 

 the light line; ceU-cavity broad at the base, narrowing up- 

 ward, constricted in several places. Cells carry a great deal 

 of pigment, several chromatophores, and some protein grains. 



Osteosclerid. Cells 14 /a long. Walls thickened and striated. 

 Intercellular spaces large and elongated. 



Nutrient. Cells of this layer much compressed, in three 

 to six rows, thin-waUed, containing a great deal of pigment 

 and protein. 



Endosperm. Variable as to quantity. The aleurone cells 

 are thick- waUed, forming a continuous row; the reserve cel- 

 lulose is variable ; the cells are thick-waUed and on the addition 

 of water are gelatinized ; the internal layer of the endosperm 

 consists of thick-waUed, elongated ceUs. All of the ceUs 

 contain protein. 



Embryo. The ceUs of the first row are nearly isodiametric, 

 continuous ; exterior walls thickened. The ceUs below have 

 thinner walls and are more loosely arranged. Fat and pro- 

 tein grains fill the cells, but starch is absent. 



Astragalus canadensis, L. {A. carolinianus, L.) 



PL XIII. f. 5-5h. 



Testa and endosperm 90-110 /x thick. The species agrees 



