SFERMATOPHYTES: ANGIOSPEKMS 



215 



rowing animals, etc. The period of rest may be long or 

 short, but sooner or later, under the influence of moisture, 

 suitable temperature, and oxygen the quiescent seed begins 

 to show signs of life. 



The sporophyte within begins to grow, and the seed 

 coat is broken or penetrated through some thin spot or 



Pig. 192. Pineapple: A, the cluster of fruits forming the so-called "fruit"; B. single 

 flower, showing small calyx and more prominent corolla; C, section of flower, 

 showing the floral organs arising above the ovary (epigynous). — A, B after Koch; 

 C after Lb Maoct and Decaisvb. 



opening. The root-tip emerges first, is protruded still 

 farther by the rapid elongation of the hypocotyl, soon 

 curves toward the earth, penetrates the soil, and sending 

 out rootlets, becomes anchored. After anchorage in the 



