CALIFORNIA ACADEMY OF SCIENCES. 113 



less be found in many of the herbaria, and probably under 

 the heretofore so called 31. luteus. Its calyx is more uni- 

 formly spotted than in the true 31. guttatus, from which it is 

 most obviously distinct by its quadrangular winged stem, 

 its inflorescence, racemose almost from the very base, audits 

 small corolla, but especially by the peculiar calyx, the up- 

 per tooth of which not only almost equals the tube in length 

 but is rendered singularly conspicuous by the enfolding 

 about it, of the lower ones; which latter thus disappear en- 

 tirely from the profile, if we may so speak, thus suggesting 

 the specific name. 



M. Hallii. 



Habit of the preceding, the brandling more constant and 

 less erect : light green and glabrous throughout : stem and 

 branches more slender, angled, but not winged: leaves and 

 bracts broadly ovate, obtuse, parallel-veined, sparingly den- 

 tate or entire: calyx subglobose-inflated, with broad, ab- 

 ruptly acute teeth, the upper one twice the size of the others : 

 corolla very small, 3 — 4 lines long, the slender tube hardly 

 exserted, light yellow. 



Eastern slope of the Eocky Mountains of Colorado, at lower 

 altitudes only, about Golden City, in shady ravines. Col- 

 lected by Hall & Harbour apparent!}-, and also later by the 

 writer, in 1871. 



This, too, has gone out under the name 31. luteus, but it is 

 not nearly related to even the Eocky Mountain alpine form 

 of 31. guttatus. Its place is in this group of mainly Califor- 

 nian annual species. It is remarkable for having, for the 

 size of- the plant, the smallest corolla of any of the species. 



M. glaucescens. 



Stem terete, slender, erect and simple, 1 — 3 feet high, 

 racemose from about the middle: herbage bright green, 

 glabrous and distinctly glaucous: radical leaves orbicular to 

 ovate, subcordate, lobed and toothed, less than an inch in 

 length, on petioles twice as long; the lowest cauline pair 

 connate-clasping; all the others orbicular-perfoliate, about 



