Ml >A. 



11".) 



a. 1. 1. mt; . id, hydrochloric add, potM- 



i-iuiu Indroude, |N.ia-.Mum iodide. |MiUi"iimi Mil)', 



in Milphide. M|IUIII hydroxide, sodium 

 fulphide. .....imiii . ..i!. mm nitrate, uranium 



r..ntiiiiii intra!'-. cobalt nitrate, O-JIJKT nitrate, 

 .nuin chloride, ami nu-rruru- rh! 

 ranin and chloral In 

 with polarization, inline, gentian 

 1 t.-iMj.. r.itui. . ami the absence of any low or 

 -. Tin- \cry high reactivities of M. 

 ilphurie ai id, hydrochloric acid, potassium 



. potassium iodide. |Nita*.*ium Milpli-H-yanatc, 



. -odium hydroxide, sodium salicylatc, 



Tellium nitrate; the liiirh reactions with chromn 



I. ciKlium >ul|>!iide. uiul uruniuin nitrate; 



the mndcrete r in tin- |M>larizati<>n. iodine, gen- 



:. and safraiun, t.-nipcrature, chloral hydrate, 



im nitratr, ami copjHT nitrate r. actions; the low 



I. cobalt nitrate, cupric chlo- 



liariunt chli>nili>, and mercuric chloride; and the 

 with cobalt nitrate. The very high 

 utics of M. hybrida with sulphuric acid and the 

 I under M. gillrlii, excepting stron- 

 tium in- hitfh reactions with chromic acid, nitric 

 sodium sulphide, and strontium nitrate; the mod- 

 with jiolari/ation, iodine, gentian violet, 

 afranin, tcm;- .ilcium nitrate, uranium nitrate, 

 "|I[NT nitrate; the low reactions with chloral hy- 

 . ptnqrallic acid, cupric chloride, and mercuric 

 chloride; and the \.-ry low reactions with cobalt nitrate 

 and tiurium chloride. 



I llowing is a summary of the reaction-intensities: 



'. \u-.\Kisox8 OF THE STABCHES OF I'HAH s 



\.M'1K'I.II >. 1*. \\.\I.I.lrilIl, AMI 1'. IIYBUIHU8. 



In the histologio characteristics, polariscopic figures, 

 reactions with selcnite, qualitative reactions with iodine, 

 and qualitative reaction.-; with the various chemical rea- 

 gents, the parents and hybrid exhibit properties in com- 

 mon in varying degrees of development, and also certain 

 individualities by which collectively they can be identi- 

 fied. The starch of Phaiut trallifhii in comparison with 

 that of /'. grandifoliut shows larger proportions of 

 aggregates and compound grains ; more frequent irregu- 

 larities, but given forms of irregularity vary in fre- 

 y ; and the forms are of more varied types. The 

 luluin is more often distinct, slightly more refractive, 

 ami rarely fissured ; a longitudinal slit-like cavity at 

 tht- luluin and a deflected oblique fissure are more fre- 

 !y ni'teil ; ei ccntricity is more variable and lew. 

 Tho lamelle exhibit some differences in distribution and 

 form ; secondary sets are more numerous ; the number is 

 about the cam. T -ize of the larger grains is longer 

 and lew wide ; that of the common-sized grains about the 

 same. In the polariscopic, sclenite, and qualitative io- 

 dine reactions there arc various differences. In qualitative 

 I 



>ns with chloral hydrate. ihr<>mic acid, pyrogallic 

 .11 -ill, hydrochloric a< id, potassium hydroxide, potassium 

 i<iide, potassium sulphocyanatc, potaasium sulphide, 

 .i.uin hydroxide, sodium sulphide, and sodium sali- 

 cylatc there are very many points of difference which seem 

 to be wholly of a minor character. The starch of tho 

 hybrid in comparison with the starches of the parents 

 contains larger proportions of aggregates and compound 

 grains than in either parent; irregularities are leas fre- 

 |iient ; and then- are inure grains of a lender (< than 

 in P. grandifolitui, but less than in P. MBUUfc Tho 

 hilum is more refractive and more frequently demon- 

 strable than in either parent; a slit-like cavity at the 

 luluin is as frequently apparent as in /'. grandifoUus. 

 but less frequently than in I', u-nlliflni; lissuration is 

 -lightly more varied and more frequent than in cither 

 parent; clefts in the form of a soaring-bird figure arc 

 ven. this form not U-iiitf observed in (lie [lareiiU; eccen- 

 tricity is the same as in P. trallichii. The lamellm of 

 the primary sets are coarser than in the parents; a 

 refractive border at the proximal and lateral margins is 

 lew frequent, and it is of the same width as in P. grandi 

 folitu, but less broad as a rule than in P. wailichii. Sec- 

 ondary sets of lamella' are somewhat more frequent, often 

 larger and commonly located as in P. grandifoliiu . hut 

 leas numerous and less varied in location than in P. u-nl- 

 li'-liii; and the number is about the same as in the 

 parents. The size is closer t'. that of P. grandifdliu*. 

 In the polarization and selenite reactions there are many 

 inclinations to one or the other parent, hut on the 

 whole to P. grandifolitu ; while in the qualitative iodine 

 reactions the leanings arc on the whole to P. trallirhii. 

 In the qualitative chemical reactions the peculiarities 

 of one or the other or both parents are very well mani- 

 fested, but in each the reactions are on the whole closer 

 to those of P. grandifolius. 



UractioH-intmfilirt Krpreued by Light, Color, and Tempera 



lurr K rartion*. 

 I'nlariutinn : 



P. crandifoliiu. hich to very high, vain 

 P. wallirhii. high, lower than in P. gran-liMm*. valur 80. 

 P. hybridun. hich to very hih. lichUy higher than in P. grandi- 



fuliiu. value 87. 

 Iodine: 



P. crandifoliiu. moderate, value 50. 



P. wallichii. moderate, licbter than in P. crandifoliiu. value 40. 

 P. hybridua, moderate, intermediate between the parent*, but 



nearer to P. wallichii. value 43. 

 Grntian violet: 



P. irandifoliiu, moderate to derp. value 87. 



P. wallichii, liftht to moderate, lighter than in P. crandifoliu*. 



value 80. 



P. hybridu*. moderate to def>, deeper than either parent, value 00. 

 Safranin: 



P. grandifoliu*. moderate to deep, value 60. 



P. wallirhii. light to moderate, lighter than in P. (randifoliua. 



value 65. 

 P. hybridua, moderately deep to deep, deeper than in either parent. 



value . 

 Temperature: 

 P. grandifoJiiM, in the majority at BS to 06*. in all but rare grain* 



at 68 to 00*. mean 68.8. 

 P. wallichii. in the majority at 64 to 08*. in all but rare train* at 



67 to 68*. mean 97.3'. 



P. hybridua. in the majority at 64 to W. in all but rare grain* at 

 66 to 68*. mean 67*. 



In the reactions with polarization, iodine, gentian 



. and Mifrnnin P. gramlifnliuf exhibits higher 



reactivities than the other parent, but in the temperature 



