Hieracium laevigatum explained

Hieracium laevigatum, or smooth hawkweed, is a Eurasian plant species in the tribe Cichorieae within the family Asteraceae. It is widespread across much of Europe and western Asia.^[1] It is very similar to Hieracium sabaudum and can be found on dry, more or less nutrient rich soil in light woods, grassy embankments and fields, or on walls.^[2]

Hieracium laevigatum is an herb up to 60 cm (2 feet) tall, with leaves on the stem rather than in a rosette at the bottom. Leaves are lance-shaped, up to 10 cm (4 inches) long, with large teeth along the edge. One stalk branches toward the top, producing numerous flower heads. Each head has several ray flowers but no disc flowers.^[3]

Subspecies

• Hieracium laevigatum subsp. achalzichiense (Üksip) Greuter
• Hieracium laevigatum subsp. acrifolium (Dahlst.) Zahn
• Hieracium laevigatum subsp. analogum (Boreau) Zahn
• Hieracium laevigatum subsp. auriglandulum (Wiinst.) Zahn
• Hieracium laevigatum subsp. boreanum (Boreau) Zahn
• Hieracium laevigatum subsp. calothyrsum (Murr) Dalla Torre & Sarnth.
• Hieracium laevigatum subsp. chaubardianum (Arv.-Touv.) Zahn
• Hieracium laevigatum subsp. coronopifolioides Zahn
• Hieracium laevigatum subsp. dechyi Koslovsky & Zahn
• Hieracium laevigatum subsp. deltophylloides Zahn
• Hieracium laevigatum subsp. deseglisei (Boreau) Zahn
• Hieracium laevigatum subsp. dryadeum (Boreau) Zahn
• Hieracium laevigatum subsp. echinodermum Zahn
• Hieracium laevigatum subsp. fagineum (Arv.-Touv.) Zahn
• Hieracium laevigatum subsp. ficifolium (Arv.-Touv.) Zahn
• Hieracium laevigatum subsp. flocciparum Schelk. & Zahn
• Hieracium laevigatum subsp. glareosum (Lönnr.) Greuter
• Hieracium laevigatum subsp. goriense Koslovsky & Zahn
• Hieracium laevigatum subsp. gothiciforme (Dahlst.) Zahn
• Hieracium laevigatum subsp. gothicum (Fr.) Čelak.
• Hieracium laevigatum subsp. grandidens Zahn
• Hieracium laevigatum subsp. hypopityforme (Üksip) Greuter
• Hieracium laevigatum subsp. knafii (Čelak.) Zahn
• Hieracium laevigatum subsp. laevigans Zahn
• Hieracium laevigatum subsp. leucothyrsum (Litv. & Zahn) Greuter
• Hieracium laevigatum subsp. lineatum (Dahlst.) Zahn
• Hieracium laevigatum subsp. macrolygodes Zahn
• Hieracium laevigatum subsp. magistri (Godr.) Zahn
• Hieracium laevigatum subsp. nivale (Froel.) Zahn
• Hieracium laevigatum subsp. perangustum (Dahlst.) Zahn
• Hieracium laevigatum subsp. pesianum (Arv.-Touv. & Belli) Zahn
• Hieracium laevigatum subsp. pictaviense (Sauzé & Maillard) Zahn
• Hieracium laevigatum subsp. pseudogothicum (Arv.-Touv.) Zahn
• Hieracium laevigatum subsp. retardatum Zahn
• Hieracium laevigatum subsp. revolii (Sudre) Zahn
• Hieracium laevigatum subsp. rigidum (Hartm.) Čelak.
• Hieracium laevigatum subsp. sagotii (Boreau) Zahn
• Hieracium laevigatum subsp. semiglobosum (Dahlst.) Zahn
• Hieracium laevigatum subsp. stricticaule (Boreau) Zahn
• Hieracium laevigatum subsp. subgracilipes Zahn
• Hieracium laevigatum subsp. tridentaticeps (Zahn) Zahn
• Hieracium laevigatum subsp. tridentatum (Fr.) Čelak.
• Hieracium laevigatum subsp. vendeanum (Boreau) Zahn
• Hieracium laevigatum subsp. vogesicola Zahn

External links

• • In Flora Danica as: H. rigidum
• Czech Botany, Hieracium laevigatum Willd. – jestřábník hladký / jastrabník hladký in Czech with photos

Notes and References

1. http://luirig.altervista.org/flora/taxa/index1.php?scientific-name=hieracium+laevigatum Altervista Flora Italiana, Sparviere levigato Hieracium laevigatum Willd.
2. Web site: Stijf havikskruid (Hieracium laevigatum). 2007-12-24. Planten en bomen. SoortenBank.nl.
3. Wilson, Linda M. 2007. Key to Identification of Invasive and Native Hawkweeds (Hieracium spp.) in the Pacific Northwest. British Columbia Ministry of Forests and Range, Forest Practices Branch, Invasive Alien Plant Program - includes line drawings and color photos of numerous species