178 Plnntae Andrewseae. 



Differing in many minor points the most obvious difference is the 

 different arrangement of the leaves, P. fontana being relatively naked 

 below while in /'. rotala the leaves are crowded or 'even rosulate at base. 



P. fnntann occurs infrequently in wet or springy grassy places in the 

 mountains. Collections at hand: J. II. Cowen, South Park, Colo., Aug. 

 18, 1895; D. M. Andrews, Boulder Co. (wet meadow, 8,000 ft), Colo., Sept. 

 (?), 1904 ; A. Nelson, Crow Creek, Aug. 27, 1003 (Type). 



Mimulus minor sp. nov. 



Perennial by slender creeping rootstocks, more or less stoloniferous (the 

 stolons short, leafy, slender and occasionally rooting in the mud) ; stems 

 slender, simple or sparingly branched above, nodes variable in length 

 (usually much longer than the leaves), only 1 or 2 dm. high ; leaves 2-5 

 pairs, enlarging upwards, short-petioled or nearly sessile, ovate, 3-5 nerved, 

 the largest rarely 2 cm. long, sparsely toothed ; flowers 1-several, um- 

 bellately terminal on very slender pedicels which are 1-3 cm. long; calyx 

 campanulate, about 1 cm. long, somewhat oblique, its teeth unecjual and 

 obtuse or subacute; corolla yellow, more or less purple dotted in the throat, 

 about twice as long as the calyx, bilabiate, the dense yellow beard on the 

 lower lip extending down the tube nearly to the insertion of the stamens ; 

 the upper lip lighly ciliate-hirsute along the veins. 



The yellow species of Mimulun as is well known are extremely variable. 

 The knowledge of this fact has lead to cai-elessness in determination and a 

 " lumping " of species that does not seem to be conducive to clearness. The 

 species here described has, in recent years, passed as a depauperate M. 

 Langsdorfii Sims. This latter species is one of the largest, often attaining 

 a height of one meter. Its stems are large and fistulous ; its inflore.scence 

 racemiform, at length greatly elongated and often with a succession of 

 racemes from the leaf axils. The flowers are large and much more than 

 twice as long as the calyx. Its lower leaves are rather long-petioled, 

 coarsely toothed or often somewhat lyrate; the uppermost are always 

 connate-perfoliate atid the largest leaves are always well toward the base 

 of the stem. In fruit the teeth of the lower lip of the calyx are connivent 

 tending to close the orifice. M. minor like M. Lavgsdorfil is either glabrous 

 or puberulent, but the pubescence of the corolla in M. minor extends to the 

 veins of the upper lip, and its calyx remains open. 



The following specimens are at hand, all from Colorado : D. M. Andrews, 

 8, near Boulder, 1904 (Type) ; K. K. McKenzie, 352, Breckenridge, 1901 ; 

 Rydberg and Vieeland, 5,058, Placer Gulch, 1900; W. W. Willard, 1,926, 

 Twin Lake, 1898 ; H. N. Wheeler, 312 and 372, near Boulder, 1901 ; Baker, 

 Earle and Tracy, 181, Bob Creek, 1898 ; Baker, 392, Gunnison Watershed, 

 1902. 



Erigeron macranthus itiirus subsp. nov. 



Leaves few, thick, glabrous, pale beneath ; root-leaves 4-6 cm. long, 

 elliptic, their petioles as long or longer than the blades, margined and ex- 



