[Vor. 11 
102 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
founded on a single species, M. cardinalis Dougl. This generic 
name soon accompanied Uvedalia into synonymy. 
Bentham! continued his studies on the Scrophulariaceae and in 
De Candolle’s ‘Prodromus,’ he recognized Nuttall’s genus 
Diplacus and described another one which he called Eunanus. 
In all, thirty-one species were listed under Mimulus, four under 
Diplacus, and three under Eunanus, making a total of thirty- 
eight, eleven of which received definition for the first time. 
Asa Отау? was the next botanist to present a systematic 
treatment of this genus, and in 1876 he published a synopsis of 
all the North American species then known. In this paper, 
Diplacus and Eunanus were reduced to sections, Dr. Gray be- 
lieving that the intermediate forms made them invalid as genera. 
Twenty-nine species were included, all being grouped under 
four sections, Eunanus, Diplacus, Eumimulus, and Mimuloides. 
Bentham and Hooker? in the ‘Genera Plantarum’ followed this 
same treatment, and Gray,‘ later in the same year, added one 
more section which he called (пое. 
Стеепе, in 1885, restored Diplacus and Eunanus to generic 
rank, but in the following year, Dr. Gray* again revised the 
group and again reduced the segregates, saying “Polymorphus, 
but better retained entire under five subgenera than divided into 
as many genera.” The same year, Greene’ described the last 
segregate to be made in the genus, making M. pilosus (Benth.) 
Wats. the type species of a genus which he designated as Mime- 
tanthe. The last article to be published on the group жаза 
revision of the genus Diplacus by Greene, who again maintained 
its right to generic position. 
All of the most recent workers on the western flora, except 
Howell and Rydberg, recognize Diplacus and Mimetanthe but not 
Eunanus as valid genera. Rydberg,’ in his ‘Flora of the Rocky 
1 Bentham, G., in DC. Prodr. 10: 368-374. 1846. 
*Gray, A., in Proc. Am. Acad. 11: 95-99. 1876. 
* Bentham & Hooker, Gen. Pl. 2: 946-947. 1876. 
* Gray, A., in Bot. Calif. 1: 562-569. 1876. 
* Greene, E. L., in Bull. Calif. Acad. Sci. 1: 94-123. 1885. 
* Gray, A., Syn. Fl. №. Am. ed. 2, 2; Suppl. 442-451. 1886. 
? Greene, E. L., in Bull. Calif. Асай. Sci. 1: 181. 1886. 
* Ibid., Pittonia 2: 151-157. 1890. 
* Rydberg, Р. A., Fl. Rocky Mountains, 777-780. 1917. 
