318 PINGUICULA LUSITANICA. [Chap. XVI. 



flowera of a Galium, scales of grasses, &c., likewise adhered 

 to some of the leaves. Several of the experiments which were 

 tried on Pinguicula vulgaris were repeated on Pinyuicula 

 lusitanica, and these will now be given. 



(1) A moderately sized and angular bit of albumen was placed 

 on one side of a leaf, lialfway between the midrib and the natu- 

 rally involuted margin. In 2 hrs. 15 m. the glands poured forth 

 much secretion, and this side became more infolded than the op- 

 posite one. The inflection increased, and in 3 hrs. 30 m. extended 

 up almost to the apex. After 24 hrs. the margin was rolled into a 

 cylinder, the outer surface of which touched the blade of the leaf 

 and reached t<j within the -i^ of an inch of the niidril). After 48 

 hrs. it began to unfold, and in 72 hrs. was completely unfolded. 

 The cube was rounded and greatly reduced in size; the remainder 

 being in a semi-liquefied state. 



(2) A moderately sized bit of albumen was placed near the 

 apex of a leaf, under the naturally incurved margin. In 2 hrs. 30 

 m. much secretion was excited, and next morning the margin on 

 this side was more incurved than the opposite one, but not to so 

 great a degree as in the last case. The margin unfolded at the 

 same rate as before. A large proportion of the albumen was dis- 

 solved, a remnant being still left. 



(3) Large bits of albumen were laid in a row on the midribs 

 of two leaves, but produced in the course of 24 hrs. no elFect: nor 

 could this have been expected, for even had glands existed here, 

 the long bristles would have prevented the albumen from coming 

 in contact with them. On both leaves the bits were now jjushed 

 close to one margin, and in 3 hrs. 30 m. this became so greatly in- 

 flected that the outer surface touched the blade; the opposite mar- 

 gin not being in the least alFected. After three days the mnrgina 

 of both leaves with the albumen were still as nnuh intlectcnl aa 

 ever, and the glands were still secreting copiously. With I'imjui- 

 cula vuUjaris I have never seen inflection lasting so long. 



(4) Two cabbage seeds, after being soakeil for an hour in 

 water, were placed near the margin of a leaf, and caused in 3 hrs. 

 20 m. increased secretion and incurvation. After 24 hrs. the leaf 

 was partially unfolded, but the glands were still secreting fre<dy. 

 These l)egan to dry in 48 hrs., and after 72 hrs. were almost dry. 

 Ihe two seeds were then placed on damp sand under favourable 

 conditions for growth; but they never germinated, and after a 

 time were found rotten. They had no doubt been killed by the 

 secretion. 



(5) Small bits of a spinach leaf caused in 1 hr. 20 m. increased 

 secretion; and after 3 hrs. 20 m. plain incurvation of the margin. 

 The margin was well inflected after 9 hrs. 15 m., but after 24 hrs. 

 was almost fully re-cxpande<l. The glands in contact with the 

 spinach l)eeame dry in 72 hrs. Hits of albumen had l)een placed 

 the day licfore on the opposite margin of this same leaf, as well as 

 on that of a leaf with cabbage seeils, and these nuirgins remained 



