FOR FORMS AND QUALITIES. 



49 



late {serotinus), when they appear later than others. Tliese 

 definitions are important for distinguishing the Willow tribe. 



Again, the female and male parts come to maturity at dif- 

 ferent times. In a great many plants, the antherae are 

 sooner ripe than the stigmata or pistillas. T his is called an- 

 drogynous dichogamy ; (Tab. II. Fig. 11. Tab. VI. Fig. 5.) 

 But when the female parts come to perfection sooner than 

 the male, this is called gynandrous dichogamy. 



60. 



Many organs, from internal laws, never attain their per- 

 fect state. They vary, in consequence, both in their form 

 and substance, and become unfit for their functions. These 

 are called abortive (abortivus), and their germs are called 

 rudimenta. 



61. 



With respect to the absolute duration of plants, the fol- 

 lowing expressions are important. 



Very evanescent {fugacissimus), when an organ scarcely 

 shews itself before it again disappears ; as happens in va- 

 rious blossoms. As also in Sporidia fugacia Ceratii Pers. 

 Hypha fugax Byssi. By means of some plants, we find the 

 hour of the day, whence they are called horarii. If they 

 shew themselves only for one day, they are called ephemeral 

 (ephemeri). If they appear only in the day-time, they are 

 called diurni ; if only during the night, 7iocturni ; during 

 the morning, matutini ; mid-day, meridiani ; after mid-day, 

 pomeridiani ; in the evening, vespertini. 



62. 



Their duration for a month is denoted by menstruus ; for 

 two or three months, by bi- tri-menstres. 



If a plant dies the same year in which it sprung up and 

 blossomed, it is called an annual {planta annua), for which 

 the sign 0 is used. 



Leaves and shoots of the present year are called horni ; of 



D 



