NERINE NARCISSUS. 



515 



3 per cent of the total starch in 30 minutes ; slight prog- 

 ress in 45 minutes ; iu about 1 pur cent of the grains and 4 

 per cent of the total starch in 00 minutes. (Chart 

 D249.) 



The reaction with citpric chloride begins in rare grains 

 in 2 minutes. Complete gelatiuization occurs in less 

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

 starch in 5 minutes; in about 0.5 per cent of the grains 

 and 1 per cent of the total starch in 15 minutes; little 

 if any further advance in 30, 45, and 60 minutes, respec- 

 tively. ( Chart D 250.) 



The reaction with barium chloride begins in rare 

 grains in 2 minutes. Complete gelatiuization occurs in 



much less than 0.5 per cent of the entire number of 

 grains and total starch in 5 minutes ; little if any further 

 change occurs after treatment with this solution for 15, 

 30, 45, and GO minutes, respectively. (Chart D251.) 

 At the end of this period only rare grains are completely 

 gelatinized and the reaction has begun in but few grains. 

 The reaction with mercuric chloride 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 0.5 per cent of the 

 grains and 1 per cent of the total starch in 15 minutes; 

 little if any further advance in 30, 45, and GO minutes, 

 respectively. (Chart D 252.) 



6. NARCISSUS. 



There are perhaps less than 20 known species belong- 

 ing to this genus, but the number of cultivated forms, 

 varieties, and hybrids is very large. In this research 

 there are no recognized species among the parent-stocks, 

 all of the parental specimens being horticultural varie- 

 ties or hybrids. All of the bulbs were obtained from the 

 growers, Barr & Sons, London, with the exception of 

 N. tazctta grand monarque and N. poetaz triumph, which 

 came from H. Krelage & Son, Haarlem, Holland. Of 

 the following sets, set 14 was the only one that was 

 fully studied. 



13. Narcissus poetictts ornatus (seed parent), 2V. poeticiis 



poetarum (pollen parent), 2V. poeticus herrick (hybrid), 

 N. poeticus dante (hybrid), page 515. 



14. Narcissus tazetta grand monarque (seed parent), 2V. 



poeticus ornatus (pollen parent), IV. poetaz triumph (hy- 

 brid), page 527. 



15. Narcissus gloria mundi (seed parent), N. poeticus ornatus 



(pollen parent), A T . fiery cross (hybrid), page 530. 



16. Narcissus telamonius plenus (seed parent), N. poeticus 

 ornatus (pollen parent), A", doubloon (hybrid), page 542. 



17. Narcissus princess mary (seed parent), 2V. poeticus 

 poetarum (pollen parent), 2V. cresset (hybrid), page 548. 



18. Narcissus abscissus (seed parent), 2V. poeticus poetarum 



(pollen parent), A 7 , will scarlet (hybrid), page 554. 



19. Narcissus albicans (seed parent), N. abscissus (pollen 

 parent), .V. licolor apricot (hybrid), page 560. 



20. Narcissus empress (seed parent), N. albicans (pollen 



parent), 2V. madame de graaff (hybrid), page 566. 



21. Narcissus weardale perfection (seed parent), N. ma- 



dame de graaff (pollen parent), 2V. pyramus (hybrid), 

 page 572. 



22. Narcissus monarque (seed parent), N. madame de graaff 



(pollen parent), 2V. lord roberts (hybrid), page 578. 



23. Narcissus leedsii minnie hume (seed parent), N. tri- 



andrus albus (pollen parent), 2V. agues harvey (hybrid), 

 page 584. 



24. Narcissus emperor (seed parent), 2V. triandrus albus 



(pollen parent), 2V. j. t. bennett poe (hybrid), page 591. 



Particular interest is attached to the foregoing be- 

 cause of the same parent being used in some instances 

 in several sets, sometimes as the seed parent and in others 

 as the pollen parent, or always as either the seed or pollen 

 parent; and also because of a hybrid being used as a 

 parent. 



13. STARCHES OF NARCISSUS POETICUS ORNATUS, 1ST. 

 POETICUS POETARUM, N. POETICUS HERRICK, AND 

 N. POETICUS DANTE. 

 NARCISSUS POETICUS ORNATUS (SEED PARENT). 



(Plates9. lO.andll; figs. 9, 52, 56, 59, and 62; Charts D 253 to D 28G.) 



HISTOLOGIC PROPERTIES. 



In form the grains are usually simple and isolated, 

 but there are a few compound grains and fewer aggre- 



gates. The compound grains belong to three types : ( 1 ) 

 Doublets and triplets of equal size, whose method of 

 formation probably is that 1 or 2 small grains become 

 adherent to either the distal or the proximal end or the 

 sides of a large grain, and all are inclosed in 2 or 3 

 common secondary lamells; (2) 2 small grains of equal 

 size, adherent to one another at either sides or at their 

 distal ends, are inclosed in 4 to 6 common secondary 

 lamellae; (3) rarely 8 or 9 hila in a homogeneous mass 

 of starch surrounded by 3 or 4 secondary lamella?. The 

 aggregates are of 2, rarely 3, small grains linearly 

 arranged, and occasionally of a compound grain and a 

 simple grain, or of 2 compound grains. There are a 

 number of grains in which a small, simple, primary grain 

 may be seen which has later become inclosed in 3, 4, or 

 more secondary lamella?. The grains are somewhat irreg- 

 ular in form and the irregularities are due to the follow- 

 ing causes: (1) Irregular depressions and elevations in 

 the surface and margin; (2) poorly defined pressure 

 facets on the distal end and sides; (3) more or less regu- 

 lar, radiating elevations and depressions of the surfaces, 

 particularly at the distal end, giving a fluted appearance 

 to the grains; (4) large protuberances, either pointed or 

 rounded; (5) a notch or depression in the margin at the 

 proximal end or one to either side of the proximal apex. 

 The conspicuous forms are irregular ovoid, lenticular, 

 quadrilateral and polygonal, triangular of various types, 

 scalene, plano-convex, nearly round, and reuiform. The 

 additional forms are clam-shell-shaped, round, dome- 

 shaped, and elongated elliptical. The grains are rarely 

 flattened. 



The hilum is usually fissured, otherwise it appears 

 as a rather large, not very distinct, round or lenticular 

 spot. The fissures are deep but not very extensive and 

 often branched and irregular, and have the following 

 forms : ( 1 ) A single, long transverse or longitudinal cleft 

 which may be either straight or slightly bent or curved ; 

 (2) cruciate, Y- or T-shaped; (3) an irregular mass 

 of short branched fissures extending from the hiluni 

 toward the distal end. It is sometimes centric, but 

 as a rule eccentric from 0.45 to 0.25, usually 0.34, of the 

 longitudinal axis. 



The lamellce are moderately distinct, coarse, con- 

 tinuous rings, which all follow in general the form of 

 the outline of the grain, but only near the margin do 

 they conform to the irregularities of the contour. In 

 those grains which have both primary and secondary 

 starches they are usually distinct in the secondary por- 

 tion and usually invisible or indistinct in the primary 



