H^MANTHUS CRINUM. 



449 



shows qualitatively much closer relationship to //. kath- 

 erince than to H. puniceus. 



The reaction with calcium nitrate begins in very rare 

 grains in 1 minute. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains and 

 total starch in 5 minutes ; and in about the same percent- 

 age of each in 15, 30, 45, and 60 minutes, respectively. 

 (Chart D 119.) 



The reaction with uranium nitrate begins in very rare 

 grains in 1 minute. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains 

 and total starch in 5 minutes; and in about the same 

 percentage of each in 15, 30, 45, and 60 minutes, respec- 

 tively. ( Chart D 120.) 



The reaction with strontium nitrate begins in rare 

 grains in 2 minutes. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains and 

 total starch in 5 minutes; in about the same percentage 

 of each in 15 minutes ; in about 0.5 per cent of the grains 

 and 1 per cent of the total starch in 30 minutes ; in about 

 1 per cent of the grains and 1.5 per cent of the total 

 starch in 45 minutes ; and in about the same percentage of 

 each in 60 minutes. (Chart D 121.) 



The reaction with cobalt nitrate begins in very rare 

 grains in 1 minute. Complete gelatinization was not 

 observed in any grain among the entire number and the 

 process has begun in rare grains much less than 0.5 per 

 cent of both the entire number of grains and the total 

 starch, in 5 minutes; no special progress noted in 15 

 minutes ; slight progress, complete gelatinization in very 

 rare grains, still less than 0.5 per cent, and 0.5 per cent 

 of the total starch in 30 minutes ; about the same in both 

 45 and 60 minutes, respectively. (Chart D 122.) 



The reaction with copper nitrate begins in very rare 

 grains in 1 minute. Complete gelatinization was not 

 observed and the reaction has begun in but rare grains, 

 much less than 0.5 per cent of both the entire number 

 of grains and the total starch in 5 minutes; very slight 

 progress in 15, 30, 45, and 60 minutes, even less than 

 0.5 per cent of both the entire number of grains and the 



total starch are gelatinized at the end of this period. 

 ( Chart D 123.) 



Gelatinization has begun and proceeded in so few 

 grains that a definite type is scarcely defined, but in those 

 noted the process proceeds through the mesial portion 

 along the course of fissures. 



The reaction with cupric chloride begins in very rare 

 grains in 2 minutes. Complete gelatinization was not 

 observed in any grains and the process has begun in very 

 rare grains, much less than 0.5 per cent of both the 

 grain and the total starch, in 5 minutes ; very slight prog- 

 ress in 15 minutes; complete gelatinization occurs in 

 very rare grains and the process has still begun in but 

 rare grains in 30 minutes ; about the same in 45 and 60 

 minutes, at the end of which period much less than 0.5 

 per cent of both the grains and the total starch is gela- 

 tinized. The reaction has made still less progress than 

 in H. katherina. (Chart D 124.) 



Very few grains show much effect from treatment 

 with the reagent, but when observed gelatinization pro- 

 ceeds through the mesial region as in both parents, the 

 more rapid gelatinization with extension of the capsule 

 as noted in H . katherince was not observed. 



The reaction with barium chloride begins in rare 

 grains in 1 minute. Complete gelatinization is not 

 observed in any grains but about 0.5 per cent of the total 

 starch is disorganized. Little progress occurs in 15, 30, 

 45, and 60 minutes, respectively. (Chart D 125.) A 

 few more grains are affected, but gelatinization pro- 

 gresses less far than in H. katherince, there being com- 

 plete gelatinization of less than 0.5 per cent of the grains 

 and total starch in 60 minutes. 



The reaction with mercuric chloride begins in rare 

 grains in 1 minute. Complete gelatinization of entire 

 grains was not observed, and the process has begun in 

 much less than 0.5 per cent of the entire number of grains 

 and total starch in 5 minutes. There was no apparent 

 progress in 15, 30, 45, and 60 minutes, there still being 

 much less than 0.5 per cent of both the entire number of 

 grains and total starch in 60 minutes. (Chart D 126.) 



4. CRINUM. 



The members of this genus are large bulbous plants 

 that are natives of tropical and semi-tropical countries 

 and widely cultivated as garden and green-house plants, 

 especially in the old world. The genus is closely allied 

 to Amaryllis, Ammocharis, Brunsvigia, Nerine, and 

 Strumaria. Baker (Amaryllideae, page 74) describes 79 

 species, 13 of which are natives of tropical America, but 

 only one is a native of the United States (C. americanum 

 Linn., popularly known as the Florida Swamp Lily). 

 He divides them into three sub-genera Sienaster, Plat- 

 yaster, and Codoncrinum. There are said to be only 

 two hardy species C. moorei Hook. (0. makoyanam 

 Carr., C. colensoi Hort., C. mackenii Hort., and C. nata- 

 lense Hort.) and C. longifolium Thumb. (C. capense 

 Herb., C. riparium Herb., Amaryllis longifolia Linn., 

 Amaryllis capensis Miller), the former being the less 

 hardy. 



The crinums are very readily hybridized, and a large 

 number of hybrids have been reported abroad and in this 

 country. The principal species used were C. longifolium, 

 C. asiaticum, C. erubescens, C. zeylanicum, C. scabrum, 



and C. americanum, particularly the first, and also as the 

 seed parent. The only one of these hybrids that seems 

 to be generally known is C. powellii Hort. 



Three sets of parent-stock and hybrid-stock, all be- 

 longing to the subgenus Codonocrinum, were studied in 

 this research : 



1. C. moorei Hook., C. zeylanicum Linn. (C. herbertianum 

 Wall., C. wallichianum Roem., C. ornatum var. zeylanicum 

 and var. Herbertianum Herb., Amaryllis zeylanica Linn., 

 Amaryllis ornata) and the hybrid C. hybridum j. c. harvey. 

 The specimen of C. moorei was obtained from F. H. 

 Krelage & Son, Haarlem, Holland; that of V. zeylanicum 

 from Theodore L. Mead, Oviedo, Florida; and that of the 

 hybrid from the grower, Reaaoner Brothers, Oneco, Florida. 



8. C. zeylanicum, C. longifolium, and the hybrid C. kircape. 



The specimen of C. longifolium was obtained from E. H. 

 Krelage & Son, and those of C. zeylanicum and C. kircape 

 from Thomas, L. Mead, Oviedo, Florida, a grower of the 

 hybrid. 



9. C. longifolium, C. moorei, and the hybrid C. powellii. The 



specimens of the parent-stocks and hybrid-stock were 

 obtained from E. H. Krelage & Son. 



