GENUS LILIUM. 



483 



Qart No. 



GV S 



103. 



CA PA FC P S CI PA CA 



The grains begin to react at once with pyrogallic add and all are gelatinized in 17 seconds. 

 Bubbles frequently appear at the proximal end. The gelatinized grains arc more rounded at the 

 proximal end and more irregular than in L. cmididum, but the reaction is qualitatively the same. 



The reaction with ferric chloride begins in 30 seconds. A few grains are gelatinized in a 

 minute, the majority in 4 minutes, and all in 11 minutes. Bubbles appear frequently at the 

 proximal end and a flowing gelatinization movement usually first appears there, but sometimes 

 begins simultaneously at both ends; or in the triangular forms this movement is very often first 

 started at the corners limiting the distal margin. The reaction is qualitatively the same as that 

 of the grains of L. candidum. 



With Purdy's solution the grains begin to react at once. Many are gelatinized in 15 seconds 

 and all in 23 seconds. Bubbles appear at the hilum in most grains. The outline of the gelatinized 

 grains is very irregular. All the starch parts except the outermost layers of the smaller grains are 

 gelatinized in this time, and in the larger grains there is a smaller convoluted mass at the distal 

 end than in L. candidum. The process is qualitatively the same as in the latter. 



STARCH OF LILIUM TIGRINUM VAR. SPLENDENS. (Plate 22, figs. 127 and 128. Chart 103.) 



Histological Characteristics. — In form the grains are simple, isolated, and without pressure 

 facets. The surface is usually irregular and varied. The irregularities are due to many inequalities 

 in the form of elevations and depressions, and to some rather small, lamellated additions to the sides, 

 or distal or proximal end. Sometimes a long, curved, finger-like, rounded protrusion appears at the 

 proximal end. The conspicuous forms are flattened elliptical with the distal end somewhat broader 

 than the proximal; narrow triangular with rounded angles 

 and curved base; rod-shaped, which may be either bent, 

 straight, or club-shaped. There are also pyriform, irreg- 

 ularly quadrilateral, clam-shell-shaped, mussel-shell- 

 shaped, and nearly round grains. The smaller grains, 

 which are not very numerous, arc usually round, nearly 

 round, or ovoid. 



The hilum is a small, round, eccentric, not very dis- 

 tinct spot. The range of eccentricity is from one-fifth to 

 one-sixth, usually one-sixth, of the longitudinal axis. The 

 hilum is sometimes fissured, and the fissure is small, nar- 

 row, straight, clean-cut, and transverse; and two refrac- 

 tive lines sometimes extend from each end outward and 

 towards the distal end. 



The lamellae are not very distinct, rather fine circles, 

 ellipses, or irregularly formed rings or segments of 

 circles, etc. They vary in size and distinctness in dif- 

 ferent grains; usually not so fine but more distinct near 

 the distal end than near the hilum. They are often very 

 irregular in form, and nearly all follow the outline of the 

 margin. There are sometimes two or three sets of lamellae. There are about 30 on the larger grains. 



The grains vary in size from the small grains, which are 6 by G^u, to the larger, which are 54 by 

 23/i in length and breadth. The common size of the elongated forms is 32 by 18j« in length and 

 breadth. There are also many broadened forms, of which the common size is 30 by 28ju in length 

 and breadth. 



Polariscopic Properties.— The figure is eccentric, distinct, and often clear-cut in the greatest 

 part of its length; its lines are often very wavy, of varying width, and much curved, thus distorting 

 the figure. They are placed at varying angles with one another. 



The degree of polarization is high or fairly high, varying in different grains and in different 

 aspects of the same grain. It is not so high as that of the grains of L. candidum. 



With selenite the quadrants are not well defined, are verj^ irregular in shape, and unequal in 

 size. The colors are usually not pure. 



Iodine Reactions.— With 0.25 per cent Lugol's solution the grains color a deep blue-violet; 

 with 0.125 per cent solution they color fairly deeply, and the color deepens rapidly. The color is 

 deeper than that of the grains of L. candidum. After heating until all the grains are completely 



Curve of Reaction^Intensities of Starch of Liiium tigrinum 

 var. splendens. 



