THE SNAP-DRAGON FAMILY 367 



most of them are insect-pollinated. The monkey-musk is. 

 especially interesting, as it shows very marked stigmatic 

 movements. When an insect pushes its way into the 

 flower, its head comes into contact with the style, which 

 terminates in two flaps, between which lie the stigmatic 

 surfaces They immediately close, and thus protect the 

 stigma from receiving pollen from its own stamens, as the 

 insect withdraws from the flower. If they have not been 

 pollinated, the lips of the stigma re-open in about five 

 minutes, and remain open until again stimulated, but 

 as soon as the influence of the pollen is felt, they remain 

 permanently closed. Other members of the order show 

 similar movements. 



Calceolaria Sinclairii is a beautiful plant found growing 

 beside streams, from Hawke's Bay to East Cape. It produces 

 erect panicles, a foot in length, of white flowers, spotted with 

 purple. The pretty little Mazus radicans is not uncommon in 

 boggy places, in both islands. The upper lip is purple and 

 bi-lobed ; the lower is tri-lobed with a "wide band formed of 

 three rows of brownish-yellow hairs leading down to the 

 honey cavity." This of course is a guide-line for insects 

 entering the flowers. The style is found immediately under 

 the upper lip, and bears at its apex a pair of stigmatic plates. 

 These are sensitive, as in the monkey-musk, and close rapidly 

 on being irritated. The flowers are very fragrant. The most 

 important genus in New Zealand is Veronica, which is more 

 fully described below. 



Key to tJie Genera. 



1. The teeth of the upper lip cover the lateral teeth in the bud. 2 

 The teeth of the upper lip covered in the bud by one or both 



of the lateral teeth. 7 



2. Fertile stamens, 2 3 

 Fertile stamens, 4. 4 



3. Corolla inflated. Stigma with more or less rounded head. Calceolaria, p. 368. 

 Corolla not inflated. Stigma of 2 blades. tGratiola. 



4. Stigma of 2 blades. 



Corolla minute, stigma not divided. 6 



5. Corolla swollen at the throat. tMimulus. 



Corolla not swollen at the throat. Mazus. p. 368. 



tNot further described. 



