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ALLIONIACEAE. 
Leaves erect or ascending; lobes of the involucre rounded or broadly 
triangular-ovate. 
Plant prostrate or diffuse; involucres and branches of the inflorescence 
densely viscid hairy. 5. A. diffusa. 
Plants more simple, erect or ascending; branches of the inflorescence 
usually merely viscid-puberulent. 
Leaves from ovate or obovate to linear-lanceolate, usually over 5 
mm. wide. 6. A. lanceolata. 
Leaves narrowly linear, less than 5 mm. wide. 7. A. linearis. 
Leaves divergent; lobes of the involucre elliptic or oval. 
8 . A. divaricata. 
Involucres on solitary axillary peduncles, rarely also in small dense terminal 
clusters. 9. A. Bodinii. 
1. Allionia myctaginia Michx. ( Oxybaphus myctaginius Sweet) In 
alluvial soil from Ill. to Sask., Mo. and Colo.—Alt. 4000-5000 ft.—Denver; 
Ft. Collins; buttes along Poudre River, near Ft. Collins. 
2. Allionia hirsuta Pursh. On plains and sandy .valleys from Minn, to S. 
D., Nebr. and Colo.—Alt. 4000-7000 ft.—Cheyenne Mountain; Manitou; Colo¬ 
rado Springs; Cucharas Valley, near La Veta; North Cheyenne Canon; 
Colorado Springs; Englemann Canon; vicinity of Ft..Collins. 
3. Allionia pilosa (Nutt.) Rydb. In dry and sandy soil from Wis. to Sask., 
La. and Tex.—Alt. 4000-7000 ft.—New Windsor, Weld Co.; La Veta. 
4. Allionia sessilifolia Osterhout. Plains of Colo.—Livermore. 
5. Allionia diffusa Heller. In sandy soil and on plains from N. D. to Wyo., 
Kans. and Ariz.—Alt. 4000-9000 ft.—Minnehaha; Piedra; Ft. Collins; Pueblo; 
Horsetooth Gulch; Table Rock; Hotchkiss; above Rustic; Grand Junction. 
6. Allionia lanceolata Rydb. On plains and prairies and in dry sandy soil 
from Minn, to Wyo., Tenn., Tex. and Colo.—Alt. 5000-7000 ft.—Estes Park, 
Larimer Co.; Canon City; New Windsor, Weld Co.; vicinity of Ft. Collins. 
7. Allionia linearis Pursh. ( Oxybaphus angustifolius Sweet.) On dry 
plains from Minn, to Mont., La. and Ariz.; also in Mex.—Alt. 4000-9000 ft.— 
Grand Canon of Arkansas; Platte River, Denver; Grand Junction; southeast 
of Ouray; Parlin, Gunnison, Co. 
8. Allionia divaricata Rydb. In sandy valleys from Colo, to N. M. and 
Ariz.—Durango. 
9. Allionia Bodinii (Holz.) Morong. ( Oxybaphus Bodinii Holz.) On dry 
mesas from Colo, to Utah and Tex.—Alt. 4000-6000 ft.—Pueblo; Ft. Collins. 
5. WEDELIA Loeffl. 
1. Wedelia incarnata L. In valleys from Colo, to Tex. and Ariz.; also 
Mexico and Tropical America.—Canon City ( Greene ). 
Family 49. TETRAGONIACEAE Reichenb. Carpet-weed Family. 
1. SESSUVIUM L. Sea-purslane. 
1. Sessuvium sessile Pers. On saline plains from Kans. to Nev., Tex. and 
Calif.; also Mex.—Alt. about 8000 ft.—Alamosa. 
