Hieracium paniculatum
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Hieracium paniculatum |
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Hieracium paniculatum is a plant from the genus of hawkweed ( Hieracium ) within the family of Compositae (Asteraceae). It occurs in eastern North America.
description
Vegetative characteristics
Hieracium paniculatum is a perennial herbaceous plant that reaches heights of 30 to 90 centimeters. The stems are usually bare, but occasionally with star-shaped or with fine and rough 0.3 to 0.8 cm long hair and have a mostly hairless base.
At the base of the stem there are no or up to two basal leaves , while there are six to twelve or more leaves on the stem. The leaf blade is at a length of 3-15 centimeters and a width from 0.6 to 3.5 centimeters of elliptically about lanceolate to reversed-lanceolate with wedge-shaped Spreitenbasis and pointed or sharply pointed Spreitenspitze. The edges of the spread are usually serrated, but occasionally also serrated or entire. Both the underside and the upper side of the leaf are hairless or covered with fine and coarse 0.1 to 0.4 centimeter long hairs.
Generative characteristics
The flowering period extends from July to August and sometimes even into October. The umbrella-like to panicle -like total inflorescence usually contains 6 to 50 or more cup-shaped partial inflorescences. The inflorescence shaft is usually bare, but occasionally also covered with glandular and stalked hair. The bell-shaped to cylindrical involucre with a size of 0.6 to 0.7 centimeters contains 8 to 13, occasionally more hairless on the underside, less often glandular hairy bracts with pointed to pointed tips. The flower heads contain 8 to 30 ray-flowers. The yellowish white to yellow ray florets are 0.5 to 0.8 centimeters long.
The achenes are columnar with a length of 0.2 to 0.25 centimeters. The pappus consists of 35 to 40 or more straw-colored bristle hairs, which are 0.4 to 0.5 centimeters long.
Chromosome number
The number of chromosomes is 2n = 18.
Occurrence
The natural range of Hieracium paniculatum is in eastern North America. In the United States, the distribution area includes the states in New England , the Central Atlantic States and, with the exception of Florida , the South Atlantic states as well as Indiana , Kentucky , Michigan , Ohio and Tennessee . In Canada, it includes the provinces of New Brunswick / Nouveau-Brunswick , Nova Scotia , Ontario and Québec .
Hieracium paniculatum thrives in clearings in forests at altitudes of 10 to 800 meters.
Taxonomy
It was first described as Hieracium paniculatum in 1753 by Carl von Linné in Species Plantarum , Volume 2, Page 802.
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 paniculatum - online - this work is online with the same text.). (Sections Description, Occurrence and Systematics)
Individual evidence
- ↑ a b c d e f g 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 paniculatum - online - this work is online with the same text.).
- ↑ Hieracium paniculatum at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ Hieracium paniculatum at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 2, 2018.
