Studies of Selected Spermatophytes. 2^^ 



ternately compound? Describe the leaflets. What term 

 would you apply to the inflorescence? (See page 158.) 

 Examine a bud. What sort of a calyx has it ? Note what 

 becomes of the calyx about the time when the flower 

 opens. Examine the interior of the spurs of the subcor- 

 date outer petals. Do they contain nectar ? Is the nectar 

 apparently secreted by the spur itself, or are there out- 

 growths from the stamens (as in the violet), which serve as 

 nectaries ? Are the flowers fragrant ? Notice how the 

 two inner petals, united at their apices, protect the anthers 

 and stigmas. Would these petals be pushed aside by bees 

 in quest of nectar ? Do they spring back after being 

 pushed aside ? Note the actions of bees in visiting these 

 flowers. Do the anthers dehisce while the flowers are 

 still in bud ? As soon as the pollen is discharged, are the 

 stigmas ready to receive it ? Could self pollination possi- 

 bly take place ? Would it make any difference in the 

 problem of pollination whether insects work from the bot- 

 tom of the inflorescence upward or vice versa ? Dissect a 

 flower and draw the different parts. Make longitudinal 

 and cross diagrams of a flower. 



Corydalis. (Obtainable species.) — Golden Alexanders. 



Study according to the outline for Dicentra. Compare 

 Dicentra and Corydalis. Why should they not be classified 

 under the same genus ? 



Capsella bursa-pastoris. — ^^fj/z^iJ^^/'j- Purse. 



Draw an entire plant, using the symbols for leaves, 

 flowers, and fruits suggested on page 158. Draw a typical 

 basal leaf and stem leaf. Draw a single flower showing a 

 combined side and top view. Dissect a flower and draw 

 one of each set of parts. Find the term tetradynamous in 

 the glossary. Can it be applied to this flower ? Draw a 



