Senecio longipetiolatus Rydb.

Authority

New York Botanical Garden. Herbarium of Dr. Per Axel Rydberg. Purchased, 1899. Contributions from the New York Botanical Garden.

Family

Asteraceae

Scientific Name

Senecio longipetiolatus Rydb.

Description

Species Description - A tall, simple, perfectly glabrous perennial, with a short erect rootstock: stem strict, 3-6 dm. high, terete: basal leaves oblanceolate, 1-1.5 dm. long, with a slender petiole, from serrate to subentire: lower stem leaves similar; the upper reduced, lanceolate, sessile, sharply serrate, or laciniate-dentate, often auricled at the base: cyme dense, corymbiform: heads 8-9 mm. high: bracts about 20, linear, acute: the calyculate ones few, minute, subulate and crisp: rays dark orange, 4—7 mm. long and 1.5 mm. wide, 3-4-nerved: achenes strongly angled, glabrous. In the type the basal leaves are strongly serrate, but in the Colorado plants they are indistinctly so or subentire. Baker, Earle & Tracy's specimens were named by Professor Greene, Senecio crocatus Rydb. but it is entirely distinct from anything collected by Hall & Harbour, and has nothing that fits any description of 6" aureus var. croceus, except the dark rays. See further remarks under S. crocatus. S. longipetiolatus grows at an altitude of 2000-3000 m. [Plate 6, f. 10, loa.]

Discussion

Wyoming: Spread Creek, Teton Forest Reserve, 1897, F. Tzveedy, 383 (type in the herbarium of N. Y. Botanical Garden).

Distribution

Wyoming, Colorado.

Wyoming United States of America North America| Colorado United States of America North America|