192 



ELEMENTS OP BOTANY. 



while, therefore, for the student to ask himself some such 

 questions as these : '■ 



(1) Why is the pulp of so many fruits eatable ? 



(2) Why are the seeds of many pulpy fruits bitter or other- 

 wise unpleasantly flavored, as in the orange ? 



u 



w 



III 



IV 



Fig. 179. — I, Barbed Points from Fruit of Beggar's Ticks, magnified eleven times. 

 II, Hoolc of Cocltlebur, magnified eleven times ; III, Beggar's Ticlis Fruit, natural 

 size ; IV, Coclclebur Hook, natural size. 



('3} Why are the seeds or the layers surrounding the seeds 

 of many pulpy fruits too hard to be chewed, as in the date 

 and the peach ? 



(4) Why are the seeds of some pulpy fruits too small to be 

 easily chewed, as in the fig and the currant ? 



(5) Account for the not infrequent presence of currant 



• Soe Kerner and Oliver, vol. II, pp. 442-450, and Phytohiology (second paper), by 

 Prof. W. F. Ganong, Bulletin No. 13 of the New Brunswick Natural History Society, 

 St. John, N. B. 



