CALIFORNIA ACADEMY OF SCIENCES. Ill 



Fl. Bor. Am. II. 99; Walp. Rep. III. 275. 31. rivularis, 

 Lodd. Bot. Cab. t. 1525; Nutt. Journ. Acad. Philad. VII. 

 47. M. luteus, Pursh. Fl. II. 426, excl. syn. Curt. Bot. 

 Mag. t. 1501; DC. Prod. X. 370, as to the plant of N". Am. 

 Watson, Bot. King, 223; Gray, 1. c. excl. syn. 31. Tilingi, 

 and var. depauperatus, not of Linne'. 



By far the largest and most showy species of the genus: 

 very common along streams from the Aleutian Islands to the 

 southern part of California, and eastward to the Rocky 

 Mountains of Colorado. The later name, 31. rivularis, Nutt. 

 would have been better suited to the plant, for the calyx, 

 though frequently dotted, is more constantly so in some 

 other species. 31. luteus, Linne, along with which this and 

 some other North American species have been put by all 

 recent authors, belongs to South America. Its inflorescence 

 is not at all racemose, and no part of the plant is erect, ex- 

 cept the elongated peduncles; these spring from the axils of 

 all the leaves, the stems being prostrate, and rooting freely 

 at the joints, as in the North American 31. Jamesii. The 

 flowers in our specimens, which are from Chili, are more 

 red than yellow, quite resembling- those of the cultivated 

 variety known as 31. tigrinus. 



+- -t- Annuals: large or small-flowered. 



M. microphyllus, Benth. 



Pubescent, or in the smallest forms glabrous: stems terete, 

 slender, sometimes with ascending branches but usually 

 simple, 2—12 inches high, racemose above or, in depauper- 

 ate states, with a single terminal flower: leaves few, ovate 

 to orbicular, often cordate at base, sometimes lyrate, den- 

 ticulate, or coarsely toothed, purple beneath: peduncles 

 slender, in small states filiform: calyx dotted, oblique at the 

 orifice; the teeth obscure or prominent, the upper one largest: 

 corolla \ — | inch long, with proportionally narrower throat 

 and broader limb than in the last species; with or without 

 purple spots. DC. Prod. X. 371. 31. luteus, var. depauper- 



