Hieracium longiberbe
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| Hieracium longiberbe | ||||||||||||
| Howell |
Hieracium longiberbe is a plant from the genus of hawkweed ( Hieracium ) within the family of Compositae (Asteraceae). This endemic is found only along the Columbia River in the northwestern United States.
description
Vegetative characteristics
Hieracium longiberbe is a perennial herbaceous plant that reaches heights of 25 to 50 centimeters, sometimes even more. The stems are usually covered with fine and coarse 0.2 to 0.8 cm long hair, rarely also hairless and have a bald or rough hairy base.
At the base of the stem there are no or up to three, occasionally more basal leaves , while there are six to twelve or more leaves on the stem. The leaf blade is at a length of 2.5 to 10 centimeters and a width of 0.8 to 2.5 centimeters to spatulate upside-lanceolate with more or less wedge-shaped Spreitenbasis and blunt or tapered Spreitenspitze. The spreading margins are usually whole, occasionally also serrated. The underside of the leaf is covered with fine and rough hairs 0.2 to 0.5 centimeters long, while on the upper side of the leaf only the leaf margins are usually fine and coarse hairy, rarely also bald.
Generative characteristics
The flowering period extends over the month of July. The umbrella-like total inflorescence usually contains three to twelve or more cup-shaped partial inflorescences. The inflorescence shaft is covered with star-like, occasionally with fine, rough or glandular hair, rarely also bald. With a diameter of 0.7 to 1 centimeter, the bell-shaped involucre contains 12 to 15, sometimes more on the underside, rough and star-like hairy bracts with more or less rounded tips. The flower heads contain 12 to 24 or more ray florets. The yellow ray florets are 0.7 to 1.2 centimeters long.
The achenes are cylindrical with a length of about 0.35 centimeters. The pappus consists of 32 to 40 or more white or straw-colored bristle hairs, which are 0.5 to 0.6 inches long.
Occurrence
This endemic thrives only along the Columbia River . Hieracium longiberbe occurs in the two northwestern United States states of Oregon and Washington .
Hieracium longiberbe thrives at altitudes of 30 to 100 meters where it grows on rock faces in the Columbia River Gorge .
Taxonomy
It was first described as Hieracium longiberbe in 1901 by Thomas Jefferson Howell in A Flora of Northwest America , Volume 4, Page 395.
swell
- John L. Strother: Asteraceae . Hieracium . In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico . Magnoliophyta: Asteridae, part 6: Asteraceae, part 1 (Mutisieae-Anthemideae). Volume 19. Oxford University Press, New York and Oxford 2006, ISBN 0-19-530563-9 , Hieracium (English, Hieracium longiberbe - online - this work is online with the same text.). (Sections Description, Occurrence and Systematics)
Individual evidence
- ↑ a b c d e f John L. Strother: Asteraceae . Hieracium . In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico . Magnoliophyta: Asteridae, part 6: Asteraceae, part 1 (Mutisieae-Anthemideae). Volume 19. Oxford University Press, New York and Oxford 2006, ISBN 0-19-530563-9 , Hieracium (English, Hieracium longiberbe - online - this work is online with the same text.).
- ↑ Hieracium longiberbe at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed October 15, 2017.