4 LEAFLETS. 



M. EROSUS. Annual, stoutish, 5 to 8 inches high, obscurely 

 and obtusely 4-angled, rather short- jointed and more or less 

 geniculate but not procumbent : leaves small, suborbicular or 

 subreniform above a broadly cuneate petiolar base, the mar- 

 gins of all erose to strongly erose-dentate : fruiting pedicels 

 of twice the length of leaves, filiform but firm : fruiting calyx 

 strongly bilabiate and closed, coarsely purple-dotted : corolla 

 of twice the length of the calyx, with long-exserted tube and 

 small limb. 



Santa Agneda, Lower California, Edw. Palmer, 1890, n. 233 

 as in U. S. Herb. 



M. FALLENS. Annual, erect, very slender, 3 to 6 inches 

 high, dull-green and glaucescent : leaves small, in few pairs 

 and remote, very thin, oval to suborbicular, the upper broader 

 and sessile, the lower narrower and on rather long winged 

 petioles, all, even the petiolate ones, connate at the very base, 

 some subentire, others toothed slightly ; pedicels elongated, 

 filiform : corollas clear yellow, large for the plant : fruiting 

 calyx oval, closed by the usual folding of the segments ; these 

 all obtuse. 



Vicinity of Durango, Mexico, Edw. Palmer, 1896 ; his n. 

 55, as in U. S. Herb. 



M. PUBERULUS. Greene, in Rydb. Fl. Col. 311 (1906). 

 Stems upright, terete, J^ to 1 foot high, branching, viscidly 

 hirtellous or at least viscid-puberulent throughout: leaves not 

 large, the lower obovate, spatulate at base, upper oval or ovate, 

 sessile, all more or less and variously toothed : corollas large 

 for the plant, 1 inch long, yellow; pedicels very short, not 

 equalling the mature calyx, this oval, with uppermost tooth 

 very large and prominent. 



Type in my own herbarium from Pagosa Springs, Colo., by 

 C. F. Baker, 27 July, 1899. 



M. LONGULUS. Annual, slender, suberect, often a foot 

 high or more, simple, glabrous, glaucescent, sparsely leafy 

 and few-flowered, stem obtusely quadrangular, the lower inter- 

 nodes commonly 8 inches long.': leaves small for the plant, orbi- 



