NARCISSUS. 



525 



The hilum, if not fissured, is as distinct as in N. 

 poeticus ornatus; but it is usually fissured, not so fre- 

 quently as in N. poeticus poelarum or N. poeticus herrick, 

 but as extensively and as deeply as in N . poeticus poe- 

 tarum. The fissures have the following forms: (1) 

 Cruciate-, Y-, and T-shaped; (2) a straight line longi- 

 tudinally or horizontally placed; (3) an irregularly stel- 

 late group of fissures. The hilum is sometimes centric, 

 but in the majority of the grains is eccentric from 0.42 

 to 0.3, usually 0.3S, of the longitudinal axis. In the 

 character and eccentricity of the hilum N. poeticus dante 

 shows a closer relationship to N. poeticus poetarum than 

 to 2V. poeticus ornatus. 



N. poeticus dante shows as close a relationship to 

 2V. poeticus poetarum as does 2V. poeticus herrick to 2V. 

 poeticus ornatus. 



The lamellce are in character, arrangement, and dis- 

 tinctness the same as those described under 2V. poeticus 

 poetarum. The number counted on some of the larger 

 grains varies from 8 to 14, usually 10. In the character 

 and arrangement of the lamellae TV. poeticus dante shows 

 a closer relationship to 2V. poeticus poetarum than to 

 2V. poeticus ornatus. 



N. poeticus dante shows as close a relationship to 

 2V. poeticus poelarum as 2V. poeticus herrick does to 

 2V. poeticus ornatus. 



In si-ze the grains vary from the smaller which are 5 

 by 5/j,, to the larger broad forms which are 38 by 50/x, 

 in length and breadth. The common sizes are 32 by 32/t 

 and 32 by 40/t. 



In size 2V. poeticus dante shows a closer relationship 

 to 2V. poeticus poetarum than to 2V. poeticus ornatus. 



2V. poeticus dante is larger than 2V. herrick and there- 

 fore not so close to 2V. poeticus poetarum in size. 



POLABISCOPIC PBOPERTIES. 



The figure is usually distinct and is rarely well 

 defined as in 2V. poeticus poetarum. The lines bisect 

 one another at angles of varying size and are apt to be 

 bisected and bent as in 2V. poeticus poetarum. The 

 figure is more often a cross than in 2V. poeticus poetarum, 

 but the other figures described under that starch are 

 also seen. 



The degree of polarization varies from low to very 

 high (value 47), somewhat lower than in 2V. poeticus 

 ornatus, much higher than in 2V. poeticus poetarum, and 

 the same as in the other hybrid. There is the same 

 amount of variation in the same aspect of a given grain 

 as in 2V. poeticus ornatus. 



With selenite as in 2V. poeticus poetarum the quad- 

 rants are not well defined and are irregular in size and 

 shape. The colors are usually not pure and there are 

 very few grains which show a greenish tinge. 



In the character of the figure and the appearances 

 with selenite 2V. poeticus dante shows a closer relation- 

 ship to 2V. poeticus poetarum, and in the degree of 

 polarization to 2V. poeticus ornatus. 2V. poeticus dante 

 and 2V. poeticus herrick show the same degree of close 

 relationship to 2V. poeticus poetarum in the polarization, 

 figure, and the reactions with selenite, but to 2V. poeticus 

 ornatus in the degree of polarization. 

 IODINE REACTIONS. 



With 0.25 per cent Lugol's solution the grains all 

 color a moderate violet tinged with blue (value 45), the 



same as in 2V. poeticus poetarum and the other hybrid, 

 and the color derpi-ns with moderate rapidity until it is 

 very deep, becoming bluer in tint at the same time. 

 With 0.125 per cent Lugol's solution the grains all color 

 a light violet, the same as in N. poeticus povtaru-in. 

 After heating in water until all the grains are completely 

 gelatinized and then adding a 2 per cent Lugol's solution 

 the gelatinized grains all color a moderate indigo-blue 

 and the solution a deep indigo-blue as in 2V. poeticus 

 poetarum. If the preparation is boiled for 2 minutes 

 and then treated with an excess of 2 per cent Lugol's 

 solution most of the grain-residues color a light indigo- 

 blue, and only the capsules of some are colored. The 

 capsules color a red or a reddish violet, and the solution 

 a very deep indigo-blue as in 2V. poeticus poelarum. 

 Qualitatively and quantitatively the iodine reactions of 

 2V. poeticus dante are closer to those of 2V. poeticus poe- 

 tarum than to those of 2V. poeticus ornatus. There are 

 no marked differences between the reactions of the two 

 hybrids. 



ANILINE REACTIONS. 



With gentian violet the grains all color lightly at 

 once, and in half an hour they are lightly to moderately 

 colored (value 35), the same as in 2V. poeticus poetarum. 



With safranin the grains color lightly at once, and 

 in half an hour they are moderately colored (value 50) 

 the same as in 2V. poeticus poetarum. 



In the reaction with aniline stains 2V. poeticus dante 

 shows a much closer relationship to 2V. poeticus poetarum 

 than to 2V. poeticus ornatus. 



2V. poeiicus dante stains more than does 2V. pof Ileus 

 herrick and is closer to 2V. poeticus poelarum. 



TEMPERATURE REACTIONS. 



The temperature of gelatinization of the majority 

 of the grains is 71.2 to 73.1 C., and of all is 74 to 76 

 C., mean 75 C. The temperature of gelatinization of 

 2V. poeticus herrick shows a much closer relationship 

 to 2V. poeticus ornatus than to 2V. poeticus poetarum. 

 The temperature of gelatinization of 2V. poeticus dante is 

 lower than that of 2V. poeiicus herrick and is practically 

 mid-intermediate between 2V. poeticus ornatus and 2V. 

 poeticus poetarum. 



EFFECTS OF VARIOUS REAGENTS. 



The reaction with chloral hydrate begins in a few 

 grains in 1 minute. Complete gelatinization occurs in 

 about 4 per cent of the entire number of grains and 7 per 

 cent of the total starch in 5 minutes ; in about 6 per cent 

 of the grains and 10 per cent of the total starch in 15 

 minutes; in about 7 per cent of the grains and 12 per 

 cent of the total starch in 30 minutes; in about 11 per 

 cent of the grains and 1C per cent of the total starch in 

 45 minutes ; little if any further advance in GO minutes. 

 (Chart D259.) 



There are a few grains in which a bubble is formed 

 at the hilum as in 2V. poeticus herrick, and fewer than in 

 either parent. The lamellae are at first indistinct and 

 later become moderately distinct as in both parents and 

 2V. poeticus herrick. The marginal band of starch, which 

 is the first part to show an increased refractivity, is as 

 narrow and refractive as in 2V. poeticus poetarum, and 

 narrower and less refractive than in either A T . poeticus 

 ornatus or 2V. poeiicus herrick. Gelatinization begins 



