220 Trans. Acad, Sci. of St. Louis. 



wanting. Reserve food consists of fat, protein, and starch 

 or reserve cellulose. 



Glycineae. Osteosclerids I-shaped ; endosperm reduced, 

 palisade cells usually wanting. Reserve food consists of fat, 

 aleurone grains and reserve cellulose. 



1. Palisade cells present in cotyledons Glycine, 



1. Palisade cells absent (2). 



2. Cell-walls of cotyledons very thick Centrosema. 



2. Cell-walls of cotyledons less thickened (3). 



3. Cell-walls of cotyledons more or less strati- 



fied, with large pore-canals Clitoria. 



3. Cell-walls of cotyledons with small pore- 

 canals Amphicarpaea. 



Galactieae. Cuticle somewhat uneven, cuticularized layer 

 present; Malpighian cells with cell-cavity large at the base; 

 osteosclerids I-shaped; mycotic layer evident. Endosperm 

 consists of the aleurone layer and several rows of small cells. 

 Epidermal cells much smaller than those of the parenchyma. 

 Reserve material consists of fat, starch, and aleurone grains. 



Galactia. 



Erythrineae. Malpighian cells long ; osteosclerids I- 

 shaped ; endosperm nearly wanting. Epidermal cells much 

 smaller than those of the parenchyma, palisade cells present 

 or wanting. Reserve food consists of starch, aleurone grains, 

 and fat. 



1. Starch grains large Mitcuna. 



1 . Starch grains small Apios. 



EuPHASEOLEAE. Malpighian cells usually long ; osteo- 

 sclerids usually I-shaped; nutrient layer well-developed; 

 mycotic layer conspicuous or nearly wanting; endosperm 

 nearly wanting. Epidermal cells of the cotyledons much 

 smaller than those of the parenchyma. Reserve food mate- 

 rial consists of starch, aleurone grains and fat. 



1. Mycotic layer of testa conspicuous Phaseolus. 



1. Mycotic layer not conspicuous (2). 



2. Surface of Malpighian cells covered with 



more or less deciduous hairs 8trophostTjles. 



2. Surface of Malpighian cells not covered 



with hairs (3). 



3. Spongy parenchyma of hilar region greatly 



developed Dolichos. 



3. Spong}'^ parenchyma of hilar region less 



developed Vigna. 



Cajaneae. Malpighian cells long; osteosclerids I-shaped; 

 endosperm nearly wanting. Epidermal cells of the cotyledons 



