46o BOTANICAL GAZETTE 



[JUNE 



twenty to twenty-four inches and to produce branched racemes 



more 



of the larger forms, such as grow in the dune region in Indiana. But 

 in their lack of chasmogamous flowers, they are somewhat different 

 from any I have noticed there. The cases alluded to in his article 



more 



— — — ■ w "-• ^y ^/ k^ *. a *_s v_- \_ I • 



T. S. Brandegee has likewise observed the plant about San Diego, 

 Cal., "bearing cleistogamous flowers on the lower part of the main 

 and the whole length of many side branches "» 



1 • 1 1 « 



more 



like the larger forms here. Yet these statements from different 

 sources indicate that the plant varies somewhat in its behavior in the 



ironment 



Cleistogamy in Linaria is not confined to our wild toad-flax. 

 It is one of the forty-four genera given in an article by Kuhn in 1867 

 as producing examples with flowers of this character." This list 

 has been much increased since that date. Kuhn does not give the 

 name of the species, but probably refers to L. spuria Mill., whose 



MlCHALET 



Michalet gives it as an example of a plant bearing hypogeous 



flowers. 



may 



ground." 13 



m 



Mich 



"infrequent in an annual plant," that of producing hypocotylous 

 buds. Its lower leaves are opposite and much crowded. Two 



Some of these, strong and 



from 



often much elongated, spread over the surface of the ground; others 

 short slender, and much twisted, with small squamose leaves, gather 



, aU uvc uxc couar ot the root, "all with a manifest tendency 



to bury themselves in the ground, especially the small hypocotylous 

 branches which sometimes appear." Under suitable conditions they 

 impenetrate the ground to the depth of 2-. On account of the 



•° Brandegee, T. S., Cleistogamous flowers in Scrophulariaceae. Zoe 5:13- 



Bot. 2^25 • 6- "' fs^ 86 Bemerkungen Uber Vandellia und der Blutenpolymorphismus. 



Ro f " MlCH t LET ' E -' SurIaflorai sondes Viola et du Linaria spuria. Bull. Soc. 



Bot. b ranee 7:465. i860. r 



'3 Darwin, C, Different forms of flowers 325. 1877. 



I900 





