Tribe Astereae

I. Chrysopsis. Nutt.

1. C. villosa. Nutt. Golden Aster.

2. C. hispida. (Hook.) Hairy Golden Aster.

II. Solidago. L

1. S. canadensis. L. Canada Golden-rod.

2. S. decumbens. Greene. Field Golden-rod.

3. S. multiradiata. Gray. Northern Golden-rod.

4. S. missouriensis. Nutt. Mountain Golden-rod.

5. S. nemoralis. Ait. Gray Golden-rod.

6. S. elongata. Nutt. Slender Golden-rod.

III. Aster. (Tourn.) L.

1. A. commutatus. (T. and G.) Gray. White Aster.

2. A. alpinus. Alpine Aster.

3. A. conspicuous. Lindl. Large Purple Aster.

4. A. Fremonti. (T. and G.) Gray. Fremont's Aster.

5. A. frondeus. (Gray.) Greene. Leafy-bracted Aster.

6. A. Engelmanni. Englemann's Aster.

7. A. Lindleyanus. T. and G. Lindley's Aster.

8. A. laevis. L. Smooth Aster.

9. A. Richardsonii. Spreng. Richardson's Aster.

10. A. major. (Hook.) Porter. Great Northern Aster.

11. A. ciliomarginatus. Rydb. Hairy-margined Aster.

12. A. sibiricus. Violet Aster.

IV. Erigeron. L.

1. E. aureus. Greene. Yellow Fleabane.

2. E. compositus. Pursh. Fern-leaved Fleabane.

3. E. multifidus. Rydb. Daisy Fleabane.

4. E. melanocephalus. Nelson. Black-woolly Fleabane.

5. E. csespitosus. Nutt. Tufted Fleabane.

6. E. glabellus. Nutt. Rough Fleabane. 7. E. acris. L. Blue Fleabane.

8. E. philadelphicus. L. Lavender Fleabane.

9. E. uniflorus. L. Arctic Fleabane.

10. E. lanatus. Hook. Alpine Fleabane.

11. E. salsuginosus. (Richards.) Gray. Large Purple Fleabane.

Tribe Inuleae

V. Antennaria. Gaertn.

1, A. racemosa. Hook. White Everlasting.

2. A. Howellii. Greene. Mouse-ear Everlasting.

3. A. parvifolia. Nutt. Mountain Everlasting.

4. A. lanata. (Hook.) Greene. Arctic Everlasting.

5. A. pulcherrima. Greene. Tall Everlasting.

6. A. alpina. Gray. Alpine Everlasting.

7. A. media. Greene. Silky Everlasting.

8. A. rosea. Greene. Pink Everlasting. VI. Anaphalis. DC.

1. A. margaritacea. (L.) B. and H. Pearly Everlasting. .

Tribe Heliantheae

VII. Rudbeckia. L.

1. R. hirta. L. Black-eyed Susan. VIII. Helianthus. L.

1. H. giganteous. L. Giant Sunflower.

Tribe Helenineae

IX. Gaillardia. Foug.

1. G. aristata. Pursh. Brown-eyed Susan.

Tribe Anthemideae

X. Achillea. (Vaill.) L.

1. A. lanulosa. Nutt. Woolly Yarrow.

2. A. borealis. Bong. Dark-margined Yarrow. XI. Chrysanthemum. (Tourn.) L.

1. C. Leucanthemum. L. Ox-eye Daisy. (Introduced.) XII. Artemisia. L.

1. A. frigida. Willd. Pasture Wormwood.

2. A. discolor. Dougl. Green Wormwood.

3. A. biennis. Willd. Biennial Wormwood.

Tribe Senecioneae

XIII. Petasites. (Tourn.) Hill.

1 P. palmatus. (Ait.) Gray. Palm-leaved Coltsfoot. 2 P. sagitatus. (Pursh.) Gray. Arrow-leaved Coltsfoot. 3 P. frigidus. (L.) Fries. Arctic Coltsfoot.

XIV. Arnica. L.

1. A. cordifolia. Hook. Heart-leaved Arnica.

2. A. latifolia. Bong. Broad-leaved Arnica.

3. A. alpina. (L.) Olin. Alpine Arnica.

4. A. Chamissonis. Less. Chamisso's Arnica.

5. A. Parryi. Gray. Parry's Arnica.

6. A. louiseana. Farr. Schaeffer's Arnica, 7. A. fulgens. Pursh. Notched Arnica.

8. A. gracilis. Rydb. Slender Arnica. XV. Senecio. (Tourn.) L.

1. S. Balsamitse. Muhl. Golden Ragwort.

2. S. triangularis. Hook. Giant Ragwort.

3. S. canus. Hook. Silvery Groundsel.

4. S. lugens. Richards. Black-tipped Groundsel.

5. S. pseudaureus. Rydb. Canada Ragwort.

6. S. discoideus. (Hook.) Britton. Northern Squawweed.

7. S. flavovirens. Rydb. Western Balsam Groundsel.

Tribe Cynareae

XVI. Saussurea.

1. S. densa. Hook. Purple Saussurea. XVII. Carduus. (Tourn.) L.

1. C. Kelseyi. White Thistle.

2. C. foliosus. Hook. Leafy Thistle.

3. C. undulatus. Nutt. Wavy-leaved Thistle.