ASTERACEAE: HELENIEAE 187 
Achene densely villous, pappus as long as the width of the achene. 
2. H. tenuifolius. 
Corolla yellow, heads 12-25 mm. broad; perennials. 3. H. filifolius. 
1. Hymenopappus corymbosus T. & G. 
Nebraska according to Britton’s Manual. 
2. Hymenopappus tenuifolius Pursh. 
Common in sandy soil. Anselmo; Dismal River; Foster; Franklin; 
Phelps County; Valentine. 
3. Hymenopappus filifolius Hook. 
Common in dry sandy prairies. Broken Bow; Box Butte County; 
Deuel County; Cedar County; Merriman; Mullen; Pine Ridge; Sioux 
County; Thedford. 
2. Polypteris. 1007. 
1. Polypteris hookeriana (T. & G.) A. Gray. 
On dry prairies in the western part of the state. Hat Creek Basin; 
Lincoln; Whitney; Royal. 
3. Picradeniopsis. 1008. 
1. Picradeniopsis oppositifolia (Nutt.) Rydb. 
Whitney. 
4. Tetraneuris. (Picradenia.) 1008. 
Leaves with narrowly linear blades, 1-2 mm. wide, involucre 10-13 mm. 
wide. 1.T. stenophylia. 
Leaves linear or linear-lanceolate 2-6 mm. wide, involucre 15-35 mm. 
wide. 
Scapes few, leaves 4-7 cm. long. 2. T. simplex. 
Scapes tufted, leaves 3-5 cm. long. 3. T. acaulis. 
1. Tetraneuris stenophylla Rydb. 
In dry soil in the western part of the state. Franklin. 
2. Tetraneuris simplex A. Nelson. 
Western Nebraska according to Britton’s Manual. 
8. Tetraneuris acaulis (Nutt.) Greene. . 
‘In dry soil in the western part of the state. Alliance; Belmont; 
Banner County; Harrison; Scotts Bluff; Sioux County. 
5. Helenium. 1010. 
1. Helenium autumnale L. Sneeze-weed. 
In wet meadows and along streams and ditches. Bellevue; Dismal 
River; Ft. Kearney; Plainview; Newark; Plattsmouth; Scotts Bluff 
County; Valentine. 
6. Gaillardia. 1011. 
1. Gaillardia pulchella Foug. 
In dry soil in the western part of the state. Franklin; Lincoln; Red 
Cloud; Riverton. 
