Hieracium gronovii L.
Gronovius’ hawkweed, hairy hawkweed
Kingdom Plantae Plants, but not fungi, lichens, or algae
Subkingdom Tracheobionta Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division Magnoliophyta Flowering plants, also known as angiosperms
Class Magnoliopsida Dicotyledons—plants with two initial seed leaves
Subclass Asteridae A large class that encompasses asters
Order Asterales Flowering plants with a central disk flower and surrounding petals, like daisies
Family Asteraceae The aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
Genus Hieracium From Greek hierakion, “a hawk,” from Pliny’s belief that hawks strengthened their eyesight by eating these plants
Species gronovii For Jan Fredrik Gronon, for whom I can find no information other than that she lived from 1690-1762
About plant names...
I couldn't determine whether this is a native hawkweed, or one that originated in Europe.
Identification: Plants are 12-18″ (30-45 cm) in height, rarely up
to 2½′ (80 cm), with
hairy stems. Stems, leaves, and stolons secrete a milky sap when cut. Most of
the leaves are a basal rosette of spatula-shaped leaves up to 3½-4″ (9-10 cm) × 1″ (2.6 cm).
Leaves are alternate , usually unlobed and toothless, and oblanceolate , obovate ,
elliptic , or spatulate .
Flower heads are typically composed of 25-50 flowers, and take the form of a raceme composed of
several branching cymes . This compound inflorescence is called a thyrse .
Each flower is yellow, ½-1″ (1.3-2.5 cm) across, with
20-40 rays. (An otherwise similar species, Hieracium scabrum, has 40-100 rays.) Flowers
appear from July to October.
This hawkweed comparison table is an aid to identifying hawkweeds and
similar-appearing species.
Online References:
Illinois Wildflowers
Discover Life
The University of Wisconsin's Robert W. Freckmann Herbarium
Maine.gov’s Department of Conservation Maine Natural Areas Program
SEINet—the Southwest Environmental Information Network
References:
Clemants, Steven; Gracie, Carol, Wildflowers in the Field and Forest , Oxford University Press, 2006 , p. 162
8/10/2013 · Stone Arch Bridge Trail, Near Flat Rock Hill, Dunstable, Massachusetts
7/31/2012 · Bemis Rd Conservation Area, Pepperell, Massachusetts · ≈ 8 × 5″ (19 × 13 cm) ID is uncertain
Older scientific or horticultural names
Hieracium gronovii L. var. foliosum Michx.
Hieracium gronovii description by Thomas H. Kent, last updated 5 Jul 2020.
© FloraFinder.org. All rights reserved.
7/31/2012 · Bemis Rd Conservation Area, Pepperell, Massachusetts · ≈ 6 × 4″ (15 × 10 cm) ID is uncertain
7/31/2012 · Bemis Rd Conservation Area, Pepperell, Massachusetts · ≈ 4½ × 3″ (11 × 7.9 cm) ID is uncertain
8/10/2013 · Stone Arch Bridge Trail, Near Flat Rock Hill, Dunstable, Massachusetts
8/10/2013 · Stone Arch Bridge Trail, Near Flat Rock Hill, Dunstable, Massachusetts
7/31/2012 · Bemis Rd Conservation Area, Pepperell, Massachusetts · ≈ 4½ × 3″ (11 × 7.9 cm) ID is uncertain
Range:
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