Cymopterus purpureus S. Wats.

Cymopterus purpureus S. Wats. Am. Nat. 7: 300. 1873
Aulospermum purpureum Coult. & Rose, Contr. U. S. Nat. Herb. 7: 178. 1900. Aulospermum Belheli Osterhout, Muhlenbergia 6: 46. 1910. Coriophyllus purpureus Rydb. Bull. Torrev Club 40: 70. 1913. Coriophyllus Belheli Rydb. Bull. Torrey Club 40: 70. 1913.
Plants acaulescent or subcaulescent with the development of an inconspicuous pseudoscape, 10-50 cm. high, glabrous to sparsely scaberulous; leaves ovate to broadly ovate-oblong in general outline, excluding the petioles 2-13.5 cm. long, 2-10 cm. broad, ternate-pinnate or ternate-bipinnate, or rarely bipinnate, the leaflets pallid, glaucescent, subcuneate, somewhat remote, spinulose-dentate, the teeth or lobes triangular, acute, mucronate, 1-5 mm. long, 1—4 mm. broad, distinct to slightly confluent ; petioles 31 2 cm. long ; peduncles exceeding the leaves, 5-34 cm. long; involucre wanting; involucel dimidiate, of several distinct, linear, acuminate bractlets, shorter than the flowers; fertile rays 5-12, spreading or spreading-ascending, 15-45 mm. long; pedicels 4—1 1 mm. long; flowers purple or yellow; fruit oblong to ovoid-oblong, 6-12 mm. long, 5-10 mm. broad, the wings narrow at the base, a little broader than the body; oiltubes 1-8 in the intervals, 3-11 on the commissure; seed-face concave.
Type locality: New Mexico, E. Palmer.
Distribution: Southwestern Colorado and northeastern Utah;southwestern Utah to New Mexico and Arizona. (Baker IS, Payson 255.)

Cymopterus purpureus là một loài thực vật có hoa trong họ Hoa tán. Loài này được S.Watson mô tả khoa học đầu tiên năm 1873.