SCROPHULARINEAE 179 



with pollen, though this is prevented from actually touching it by a semitransparent 

 membrane. 



652. Mimulus L. 



Homogamous bee flowers, with irritable stigma (Kerner, ' Nat. Hist. PI.,' 

 Eng. Ed. I, II, pp. 280-1). 



2091. M. luteus L. ( = M. guttatus DC). (Batalin, Bot. Ztg., Leipzig, 

 xxviii, 1870, pp. 53-4.) — Bees probing the flowers of this species first touch the 

 lower lobe of the stigma, which covers the anthers, and pollinate it if they have 

 previously been dusted with pollen in another flower. The lobe is irritable and 

 now turns up, exposing the pollen-covered anthers, by which the visitors are dusted 

 anew. {Cf. Burck, Versl. Wis. Nat. Afd. K. Akad. Wet., Amsterdam, x, 1902.) 



2092. M. TUingii Regel. (Behrens, ' Beitrage zur Geschichte d. Bestaubungs- 

 theorie,' 1877-8.) — Behrens describes the flower mechanism of this species as similar 

 to that of M. luteus. 



2093. M. glutinosus Wendl., var. /3 (=Diplacus puniceus Null.). (Hilde- 

 brand, Bot. Ztg., Leipzig, xxv, 1867, p. 284.) — Hildebrand describes the flower 

 mechanism of this species as similar to that of M. luteus. 



653. Glossostigma Wight et Am. 



2094. G. elatinoides Benth. (Cheeseman, Trans, and Proc. N. Zeal. Inst., 

 Wellington, v, 1872, pp. 352-7.) — ^Cheeseman describes the flowers of this species 

 as possessing an irritable one-lobed stigma. 



654. Rehmannia Libosch, and 655. Torenia L. 



Species of these genera possess an irritable bilobed stigma. 



656. Collinsia Nutt. 



2095. C. bicolor Benth. (Delpino, ' Ult. oss.,' pp. 151-2; Hildebrand, Bot. 

 Ztg., Leipzig, xxviii, 1870, p. 658.) Delpino says that the blossoms of this species 

 present a certain similarity to butterfly flowers. The stamens and style are on their 

 lower, and the nectary on their upper side. Hildebrand states that when insects are 

 excluded effective autogamy takes place. 



2096. C. vema Nutt. — As the last species. 



2097. C. canadensis {i'auct.). (Breitenbach, Kosmos, Stuttgart, xiv, 1884.) — 

 Breitenbach says that there are three kinds of flower in this species — large her- 

 maphrodite, small female, and some with one reduced anther. 



657. Vandellia L. 



2098. V. pyxidaria Maxim. ( = Lindemia pyxidaria AIL). (Urban, Ber. D. bot. 

 Ges., Berlin, ii, 1884; Loew, ' Bliitenbiol. Floristik,' p. 290.) — There are three forms 

 of flower in this species. — (i) Chasmogamous, with corolla projecting beyond the 

 corolla for twice its length (Maximovicz) ; (2) cleistogamous (Lindernia pyxidaria 



