Mimulus. SCROPHULARIACEJS. 567 



* * Smaller-flowered or small-flowered, but the yellow (sometimes coppery or reddish) 

 corolla often a full inch or more long in M. luteus : seeds, except in the first species, 

 with smooth and thin polished coat. 



+- Leafy-stemmed, glabrous, or merely pubescent or glandular. 



-M- Calyx oblique at the orifice, especially in fruit; the upper tooth largest: leaves 

 mostly broad and thin, at least the lower very distinctlg or abruptly petioled, all 

 3 several-nerved at base. 



14. M. luteus, Linn. Erect or diffuse, from a fibrous annual root, and com- 

 monly perennial by short stolons, glabrous or merely puberulent ; the ordinary 

 erect form a foot or two or even 3 or 4 feet high : leaves ovate, oval or roundish, 

 sometimes cordate, several-nerved from base and near it, sharply and irregularly 

 dentate, or the lower occasionally lyrate-laciniate ; the upper sessile ; the floral 

 becoming small and bract-like, often connate : peduncles becoming racemose, equal- 

 ling or shorter than the flower : calyx becoming ovate-inflated in fruit and the 

 upper tooth conspicuously largest : corolla from 1^ to f of an inch long, yellow, 

 often dotted within and sometimes blotched with brown-red or purple. Bot. Mag. 

 t. 1501, 3363; Bot. Eeg. t. 1030, 1796; Andr. Bot. Eep. t. 661. M. guttatus, 

 DC. ; Hook. Fl. ii. 99. M. variegatus, Lodd. Bot. Cab. t. 1872. M. rivularis, 

 Lodd. Bot. Cab. t. 1575 ; Nutt. in Jour. Acad. Philad. vii. 47. M. li/ratus, Benth. 

 Scroph. Ind. 1. c., a state with lower leaves lyrately laciniate at base. M. Scouleri, 

 Hook. 1. c., a narrow-leaved form. M. glabratus, HBK. (?) M. Roezli, Eegel. Runs 

 through numerous and very various forms. The following are dwarf or depauperate 

 varieties. 



Var. alpinus, Gray. A span or less high, equably leafy to the top : leaves half 

 an inch to an inch long, ovate or oval, denticulate or some of them entire : stems ! 4- 

 flowered : corolla proportionally large (an inch or less long). Proc. Acad. Philad. 

 1863, 71; Watson, Bot. King Exp. 224. M. Tilingii, Eegel, Gartenfl. 1869, t. 

 631, the same plants the second year developing into the ordinary condition of 

 the species, and figured by Eegel, 1. c. 1870, 290, t. 665. M. cupreus, Veitch, in 

 Gard. Chron. 1864, 2; Eegel, 1. c. 1864, t. 422 (M. luteus, var. cuprea, Hook. f. 

 Bot. Mag. t. 5478), a form with the corolla turning orange or copper-red. 



Var. depauperatUS, Gray. Slender, mostly smooth, and with sharply-toothed 

 or laciniate leaves (from a fourth to half an inch long), slender petioles, and filiform 

 peduncles twice or thrice the length of the small flowers : corolla only a third or 

 half an inch long : some forms much approaching M. alsinoides ; but the calyx is 

 that of M. luteus, except in size. M. microphyllus, Benth. in DC. 1. c. M. tenel- 

 lus, Nutt. herb., not of Bunge. 



Moist or wet grounds, very common, extending north to the Alaskan Islands, east to the 

 Rocky Mountains, and south along the Andes to the extremity of Chili. The var. alpinus in 

 the Sierra Nevada, &c. The var. dcpauperaius consists of reduced forms, flowering as tiny or 

 slender annuals, in Oregon and California. 



M. DENTATUS, Nutt., from the woods of Oregon, if a variety of this species is a peculiar one, 

 growing in much shade. The plant so named in the Botany of Whipple's Expedition (Pacif. R. 

 Rep. iv. 64) is a smaller-flowered and depauperate form of M. luteus. 



M. ALSINOIDES, Dougl., of Oregon and British Columbia, resembles the last variety of M. luteus, 

 but is known by the narrower calyx, in fruit oblong (3 or 4 lines long), and the teeth very short ; 

 also by the filiform at length divaricate peduncles, of an inch or more in length, and nearly all of 

 them longer than the ovate or roundish leaves, these all petioled. The largest forms are a foot 

 high, and diffusely much branched, with narrow corolla half an inch long. The smallest (var. 

 minimus, Benth.) are minute, with corolla only 2 lines long. 



15. M. laciniatus, Gray. Annual, glabrous, small and very slender, a span or 

 less in height, diffuse : cauline leaves oblong or spatulate, mostly laciniately few- 

 toothed or lobed, sometimes hastate, 1 -nerved, a quarter to half an inch long and 

 with filiform petiole of equal or greater length : peduncles about the length of the 



