2028 



A TEXTBOOK OF THEORETICAL BOTANY 



(Pheasant Eye Narcissus) and a very large number of hybrid varieties 

 have been produced as garden flowers. In this genus the flowers are 

 feebly protogynous and are visited by Humble Bees and lepidopterous 



insects in search of nectar, which is 

 ^ secreted in the base of the perianth 



tube. 



Fig. 1966. — Hippeastium littatuni. 

 Cultivated variet\-. 



Fig. 1967. — Narcissus poeticiis. Hybrid garden 

 variety showing the short corona with 

 deep red edging. 



Loeb recognizes several distinct pollination mechanisms represented by 

 ditTerent species which we may enumerate below: 



1. Humble-bee flowers, in which the corona is large and bell-shaped, 

 the perianth expanded at the end like a funnel and scarcely narrowed by the 

 anthers. This type is shown by A^. odoriis and A^. pseiidonarcissus. 



2. Humble-bee flowers, in which the corona is cup-shaped but tolerably 

 deep, the perianth tube narrow and moderately long, the upper anthers 

 projecting from the tube, the lower ones enclosed in it. This type is seen 

 in A. triandriis. 



3. Lepidopterous flowers, in which the corona is shaped like a flat dish 

 with a crenulate margin, perianth tube long and very much narrowed by 

 the anthers. This is illustrated by A^. poeticiis and TV. biflorus. 



4. Humble-bee and lepidopterous flowers, in which the corona is cup- 

 shaped, perianth tube moderately long, slightly expanded at the top; 

 flowers small and the perianth lobes shorter than the tube. This type is 

 illustrated by A^. primiilinus, N. tazetta and A^. polyanthus. 



5. Lepidopterous flowers, in which the corona is shaped like a shallow 

 dish, the perianth tube very long and thin and narrowed still more at the 

 entrance by the anthers. This type may be seen in N. jonqiiilla 



Hutchinson recognizes two further tribes of the Amaryllidaceae: 



