THE UMBELLIFEROUS TRIBE. 31 



has four deep furrows (valleculae) which cause five 

 elevated n^^es to appear (y?^. 10. «.) ; the nature of 

 these furrows and ridges is very much attended to. 

 The faces of the halves of the fruit, where thev 

 touched each other before they were separated, are 

 also noticed ; they are called the commissure. In the 

 skin of the seed, underneath the rind of the fruit, 

 you will often see very minute slender brown lines 

 {jig. 10. and 9- h.), which, if highly magnified, are 

 found to be bags filled with oil; they are called 

 stripes, or v'tttce^ and it is in them that the substance 

 v.hich gives so pleasant a flavour to carawavs and 

 coriander grains, is stored up. You may, perhaps, 

 have a difficulty in finding the stripes ; if so, cut a 

 ripe grain across {fig. 10.), and you will see the 

 ends of the stripes {fig- 10. 6.) looking like little 

 mouths, out of which a dark oily matter slightly 

 oozes ; or if you are still unsuccessful in your search, 

 then make a thin slice in the same direction, place 

 it in water under the microscope, and throw light 

 upon it fi'om beneath, by means of the mirror, and 

 the ends of the stripes vn]\ appear as so many holes. 



There are few tribes of plants more familiar to us 

 than the umbelliferous, because of the many useful 

 species that it contains. The carrot, the parsnep, 

 celery, eryngo, angelica, lovage, caraway, cori- 

 ander, dill, anise, hemlock, fennel, and samphire, 

 are all well kno\\Ti kinds ; besides which there is a 

 host of others with which the Botanist is acquainted. 

 I should advise you to desire the gardener to find 

 you specimens of all those I have mentioned, and, 



