SPBCIBS OF MIMUI^US. 5 



cular to round-reniform, denticulate : corolla minute, pale- 

 yellow; calyx accrescent, in maturity approaching a half -inch 

 long, the teeth unequal, little connivent. 



Margins of spring pools that in summer have gone dry, in 

 low meadows along the Humboldt River, at Deeth, Nevada, 

 26 July, 1896 ; collected only by the writer. 



The species can only be compared with my M. Hallii of 

 Colorado ; and that is low, with rather crowded leaves and 

 flowers ; has also a calyx with much more unequal teeth and 

 these closely connivent. 



M. MiNUSCUi<us. Small delicate perennial 1 to 3 inches 

 high from slender subterranean rootstocks, the whole plant 

 more or less sparsely and minutely hispid-hirtellous : leaves 

 thin, ovate, saliently few-toothed, subsessile, barely Vo. inch 

 long : flowers large for the plant, in the smaller 1 only and as 

 if terminal, in the larger 2 or 3, on upright pedicels 1 inch 

 long or more ; calyx with 1 large and prominent and 4 very short 

 teeth, all triangular ; corolla large, % inch long, light-yellow. 



South Fork of Kern River, Calif., at 8,200 feet, J. T. Roth- 

 rock, 1875, n. 312 as in U. S. Herb. 



M. CivEMENTiNUS. Annual, with slender sharply 4-angled 

 stems leafy and flowering throughout, all after the manner of 

 M. nasutus, the corollas as small, but foliage different, the 

 leaves simply and only slightly toothed, the lower with short 

 winged petioles, the upper sessile : fruiting calyx obliquely 

 round-ovate, the teeth subequal, that is, the upper one hardly 

 prominent beyond the others. 



San Clemente Island, off the coast of southern California, 

 June, 1903, Blanche Trask. Type in U. S. Herb. 



M. CORDATUS. Annual, a foot high, firmly erect, not 

 slender, leafy mostly near the base, internodes of the obtusely 

 4-angled stem 2 inches long or more, flowers racemosely con- 

 gested near the summit : leaves purplish, cordate, lightly den- 

 tate, an inch long, on flattened petioles of equal length, the 

 few cauline smaller and subsessile, bracts of the raceme small, 

 closely sessile : corollas V^ inch long, yellow, not dotted : 



