236 
LOASACEAE. 
11. Touterea nuda (Nutt.) Eat. & Wr. ( Mentzelia nuda Nutt.) On plains 
and hillsides from western Neb. and Wyo. to Colo.—Alt. 4000-7000 ft.— 
Livermore, Larimer Co.; gulch west of Pennock’s; Platte Canon; valley of 
upper Arkansas River; Boulder. 
12. Touterea stricta Osterh. ( Hespcr aster strictus Osterh.) On plains, 
hillsides and dry valleys from western Neb. and Wyo. to Kans. and Tex.— 
Alt. 4000-7000 ft.—Colorado Springs; New Windsor, Weld Co.; Ft. Collins; 
near Manitou; Denver; Arboles; Pueblo; along the Poudre; Spring Canon, 
Lyons; Boulder. 
13. Touterea decapetala (Pursh) Rydb. ( Bartonia decapetala Pursh; 
Mentzelia ornata Pursh) In canons from S. Dak. and Alb. to Tex. and Nev. 
—Alt. 4000-7000 ft.—Ft. Collins; west of Loveland; Huerfano Valley, near 
Gardner; near Boulder. 
2. ACROLASIA. 
Sepals lanceolate-subulate, half as long as the petals or longer, acute ; seed rather 
strongly muriculate. 
Leaves ovate in outline, entire or merely coarsely toothed. 1. A. latifolia. 
Leaves lanceolate in outline; stem-leaves, except the uppermost, pinnately 
divided or lobed. 
Petals 5-7 mm. long, about twice as long as the sepals. 
Leaves divided to near the midrib with ascending lobes ; plant erect. 
2. A. gracilis. 
Leaves divided to the midrib, with divergent lobes; plant ascend¬ 
ing or diffuse. 3. A. ctenophora. 
Petals 2 -4 mm. long. 4. A. albicaulis. 
Sepals linear-oblong, obtusish, only l /$ as long as the petals, which are 3-4 
mm. long; seeds minutely muriculate (tubercles seen only by very strong 
magnifications) ; leaves entire or dentate; the upper broadly ovate. 
Tall, 3-5 dm. high; capsules 2-3 cm. long; lower leaves lanceolate or linear- 
lanceolate, some of them usually toothed. 5. A. dispersa. 
Low, less than 2 dm. high; capsules 12-15 mm. long; leaves all ovate, entire. 
6 . A. compacta. 
1. Acrolasia latifolia Rydb. . On hillsides in Colo.—Alt. 6000-8000 ft.— 
Boulder; between Sunshine and Ward; Larimer County. 
2. Acrolasia gracilis Rydb. ( 7 Y achyphyturn gracilis Nutt.) In sandy soil 
from Wyo. and Ore. to Colo.—Alt. 5000-8000 ft.—Foot-hills, Larimer Co.; 
mesas near Pueblo; Salida; Tobe Miller’s ranch. 
3. Acrolasia ctenophora Rydb. On dry hills and on railroad banks in 
southern Colo.—Alt. 6000-7000 ft.—Walsenburg; Cucharas River below La 
Veta. 
4. Acrolasia albicaulis (Dough) Rydb. ( Mentzelia albicaulis Dough) On 
sandy soil from Neb., Mont, and B. C. to N. M. and Utah.—Alt. 4000-7000 ft. 
—Mesa, Gunnison River; Hotchkiss; Rist Canon; near Boulder; Los Pinos; 
Mancos; Glenwood Springs; Sunset Canon. 
5. Acrolasia integrifolia (S. Wats.) Rydb. (M. albicaulis integrifolia S. 
Wats.; M. dispersa S. Wats.) In sandy soil from Mont, and B. C. to Colo, 
and Calif.—Alt. 6000-7000 ft.—Glenwood Springs, Garfield Co.; Horsetooth 
Gulch. 
6. Acrolasia compacta (A. Nels.) Rydb. ( M. compacta A. Nels.) In 
sandy soil in Wyo. and Colo.—Steamboat Springs. 
