Guss SYLLABUS OF GARDEN NATURE-STUDY 245 



Which usually stands higher, anther or stigma? 



Could pollen fall on the stigma of the same flower? 



In what other way could it be placed there? 



Advantage of insect pollination over wind pollination? 



Teach that when one plant is helped by another thus, 

 the resulting seeds may produce better plants (at least different 

 plants, from which nature or man may select better ones.) 



Cross-Jeterilization and hybridization may here be explained 

 (to upper grades) , as means of securing new and improved varieties. 

 Story of Luther Burbank's work, etc. 

 2. Parts for the protection of other organs and for attracting 

 insects (carriers of pollen). 



(a) Calyx (of sepals); 



(b) Corolla (of petals), sometimes with fragrance, "nectar 

 guides," and nectar (at base). 



Find and taste some of the latter at the bottom of the 

 cup of a freshly opened narcissus blossom. 



In "single" geraniiim blossoms both nectar-guides (stripes 

 or lines leading toward the nectar well) and nectar may be found. 



Why not in "double" geranitims or daffodils? 



If possible have children observe that — 



Tulips and Narcissi have six colored parts (calyx and 

 corolla, together called perianth). 



The Narcissi have also an extra outgrowth from the per- 

 ianth parts called the crown (cup-shaped), the depth or color of 

 which varies in different varieties (daffodils, paper-whites, "Chi- 

 nese sacred lily," jonquils, poet's narcissus, etc.) 



Hyacinths, the paper-white narcissus, etc. having smaller 

 flowers, these "club together" in clusters and make a larger mass 

 of color to attract the attention of insects. 



In double Tulips, etc., stamens grade off into petals 

 (deficient anthers may sometimes be found on their edges) and in 

 some "double" flowers so many of the parts needed for seed 

 production devote themselves to "looking pretty" that few seeds 

 or none are produced. 



How then may new plants be obtained from plants having 

 double flowers? (later lessons). 

 Flower, Insects and Fruit Production (Higher Grades) . 



Try to get answers from the pupils to this and the following 

 questions : 



