Rattlesnake hawkweed is unmistakeable due to the red or purple coloration that follows the outline of the veins of the leaf blades (although this coloration is sometimes absent). This native hawkweed supposedly gets its name because it inhabits the same sandy habitats preferred by …

Attractive purple-mottled foliage complements striking flowers in summer. Blooms early summer though mid summer. Attracts butterflies. Drought tolerant. Beautiful used in rock gardens, natural plantings and mixed containers. Best in full sun but tolerant of shade and poor dry soil. Uses: rock gardens, edging, borders, garden beds, containers ...

The distinctive characteristic of this species is that the veins of these leaves are very thick and often colored a bright purple. In this manner the species is quite variable. The plant grows 1-2.5 feet tall and has dandelion-like flowers in open clusters at the ends of long thin flower stalks.

3 天之前 · Two apomictic, stenoendemic species in Hieracium sect. Umbrosa are described from Mt. Babia Góra in the Western Carpathians, southern Poland: Hieracium stanislai (2n = 4x) which is similar morphologically to H. crepidifolium from the Alps, and H. walasii (2n = 3x) which differs in brownish-purple spotted leaves from all other representatives of the H. umbrosum agg.

Hieracium venosum, commonly known as the rattlesnake weed, is a flowering plant in the Asteraceae or aster family. This perennial herbaceous plant blooms from May to September and is native to Ontario, Canada and the eastern half of the United States.

Hieracium (/ h aɪ. ə ˈ r æ s i əm /), [3] known by the common name hawkweed [4] and classically as hierakion (from ancient Greek ἱέραξ, hierax 'hawk'), [5] is a genus of flowering plant in the family Asteraceae, and closely related to dandelion , chicory , prickly lettuce and sow thistle , [6] which are part of the tribe Cichorieae.

Hieracium lachenalii 13 Cypselas 2.2-5 mm long, at least the longer achenes narrowed to the tip; flowers 15-40 per head. 14 Stem with several well-developed leaves slightly smaller than the basal leaves; inflorescence corymbiform or tending toward paniculate .

Corollas yellow (often each with abaxial red stripe) or orange (drying scarlet to purple); cypselae 1–2.5 mm; pappi of 25–40+, white or sordid bristles in 1 series (plants sometimes stoloniferous)

Common hawkweed is typically found in well-drained, low-nutrient soils. Like other hawkweeds, it can spread aggressively. Its specific epithet (lachenalii) is named for Swiss botanist Prof. Werner de Lachenal (1739-1800) who was stationed at the …

In my key and descriptions, “piloso-hirsute” refers to surfaces with scattered to crowded, tapered, whiplike, straight or curly, smooth to ± barbellate hairs mostly (0.5–)2–8 (–15+) mm (sometimes called “setae”); “stellate-pubescent” refers to surfaces with scattered to crowded, ± dendritically branched (often called, but seldom truly, “stellate...