254 STARCH IN THE LEGUMINOSyE 



medium-sized grains are the most numerous. Polarization is general 

 and well marked. The hiium is very distinct in the grains of large 

 and average size, but is scarcely visible in the small ones; it is linear 

 or curved, and sometimes formed of divergent lines. The striations 

 are invisible. Starch fairly homogeneous. 



Cicer arietinum (Chick Pea).— Seeds rich in starch. The shape of 

 the grains is regular and rather ovoid, and they are of practically 

 similar size. Polarization only occurs in the largest grains. The" 

 hilum is linear, long and very often branches, and is only visible in 

 a certain number of grains. The striations are hardly visible and very 

 crowded. The starch has a fairly homogeneous appearance. 



Dolichos bulbosus (Yam Bean). — Seeds poor in starch. The shape 

 of the grains is regular, generally ovoid, and there is little difference 

 in their dimensions. All the grains polarize distinctly. The hilum is 

 visible in some seeds, not in all ; it is linear. Striations invisible. 

 Starch fairly homogeneous. 



Dolichos bulbosus (Roots). — The shape of the grains is irregular and 

 the dimensions are very variable. The hilum is punctiform, sometimes 

 linear; but it is usually rather rare. None of the grains polarize. 

 Striations visible. Starch not very homogeneous. 



Dolichos Lablab (lionavis Bean). — Seeds rich in starch. Shape of 

 the grains fairly uniform, size varying but little. All the grains 

 polarize clearly. The hilurh, which occurs somewhat rarely, is linear, 

 and occasionally bi'anched. Striations invisible. Starch fairly homo- 

 geneous. 



Ervum lens (Lentils). — Seeds rich in starch. The shape of the 

 grains is variable ; their size extremely so. Polarization occurs gener- 

 ally. The hilum is linear, very conspicuous, and often branched. 

 Striations invisible. Starch not very homogeneous. 



Mucuna utilis (Bengal Bean). — Seeds rich in starch. The shape and 

 size of the grains are very variable. Polarization occurs in the majority 

 of the grains, but is rather feeble. The hilum appears to be linear, 

 it assumes, however, numerous shapes and its position varies in 

 different grains. Striations fairly apparent in some of the big grains. 

 Starch not very homogeneous and the small grains predominate. 



Phaseolus inamoenus (Pois du Cap).— Seeds rich in starch. The 

 shape of the grains is variable, whilst their size is fairly uniform. All 

 the grains polarize distinctly. The hilum is linear and very frequently 

 branched. The striations are indistinct and scarcely visible. Starch 

 not very homogeneous. 



Phaseolus lunatus (Lima Bean). — Size and shape of grains very 

 variable. Polarization is only seen in the large grains. The hilum is 

 linear, but branched in the majority of the grains. Striations only 

 slightly visible and can only half be made out. Some compound grains 

 are found. The grains are not homogeneous in appearance. 



