: [Vor. 11 
170 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
In general, M. guttatus may be separated from the other mem- 
bers of the genus by its stout fistulous stems, its rounded leaves 
with the blade often as broad as long, its racemose inflorescence 
in which the floral leaves are mostly reduced to small braets, 
and by its stout pedicels, commonly shorter than the flowers. 
Many species and varieties have been separated from this aggre- 
gate and of these only the following seem worthy of varietal 
distinction. Some show so many intermediates that it has been 
with considerable hesitation that such varieties as depauperatus 
and puberulus are retained. "The writer feels, however, that their 
retention will lead to greater clearness. 
14a. Var. puberulus (Greene) Grant, comb. nov. 
M. puberulus Greene, acc. to Rydb. Fl. Colo. 311. 1906, nomen 
nudum; Greene, Leafl. Bot. Obs. & Crit. 2: 4. 1909; Woot. & 
Standl. Contr. U. S. Nat. Herb. 19: 587. 1915; Rydb. Fl. 
Rocky Mountains, 778. 1917. 
Perennial; stems erect, densely pubescent above, often freely 
branched from the base; leaves broadly ovate or elliptical, 1-4 
cm. long, acute or obtuse, puberulent or pubescent, usually gray- 
ish-green; pedicels shorter than the flowers, sometimes recurved 
in fruit; corolla 2-3 сш. long. 
Distribution: in wet places in southern Colorado and northern 
New Mexico. 
Specimens examined: 
Colorado: Pagosa Springs, 27 July, 1899, С. F. Baker 587 (U. 8. 
Greene, TYPE, M, R. Mt., and Pomona); Keating, Fremont 
Co., without date, Comstock (Cornell); near Boulder, 9 June, 
1900, Ramaley 115 (В. Mt.). 2 
New Mexico: mouth of Pouchuelo Creek, Pecos River National 
Forest, 8500 ft. alt., 30 June, 1908, Standley 4089 (M). 
14b. Var. depauperatus (Gray) Grant, comb. nov. ы 
M. luteus var. depauperatus Gray in Bot. Calif. 1: 567. 1876; 
Syn. Fl. №. Am. 2!: 277. 1878, ed. 2, and Suppl. 448. 1886; 
Henry, Fl. Brit. Columbia, 268. 1915. 
M. microphyllus Benth. in DC. Prodr. 10: 371. 1846; Greene 
in Bull. Calif. Acad. Sei. 1: 111. 1885; Howell, Fl Northwest 
