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P. aurea 'Holochrysa' – common name "golden golden", culms turn yellow/gold sooner than the type form, random leaves have a yellow stripe; P. aurea 'Koi' – culms turn yellow, but sulcus stays green, random leaves have a yellow stripe; P. aurea 'Takemurai' – culms grow taller and lack the compressed internodes of the type form
During the year, the plant grows about 30 cm (12 in) and produces 6-7 leaves. Its single leaves, usually arrow-shaped, are up to 30 cm (12 in) long. In the wild, the leaves are dark green and without variegation. Cultivated varieties have leaves in various shades of green, often light green and usually with different types of lighter tannins.
Whilst L. birnbaumii itself is harmless to plants, the high moisture conditions in which it fruits can invite a host of other fungi and mold species which may harm the plant and result in root rot. In this regard L. birnbaumii can serve as a useful indicator to help ensure plants remain healthy.
Leaves may also be whorled if several leaves arise, or appear to arise, from the same level (at the same node) on a stem. Veronicastrum virginicum has whorls of leaves separated by long internodes. With an opposite leaf arrangement, two leaves arise from the stem at the same level (at the same node), on opposite sides of the stem. An opposite ...
Flower head Leaves. This plant is a taprooted perennial herb producing rough-haired stems usually one to three meters tall. The leaves are variable in shape and size, being 4 to 60 cm (1 + 1 ⁄ 2 to 23 + 1 ⁄ 2 in) long and 1 to 30 cm (1 ⁄ 2 to 11 + 3 ⁄ 4 in) wide. They are hairy, smooth-edged or toothed, and borne on petioles or not.
The plants often grow together in crowded colonies and spread by runners at or just under the soil surface. In late summer the plants produce tubers that are twice as long as wide, [9] each typically measuring 0.5 to 5 cm (1 ⁄ 4 to 2 in) in diameter. [8] The plant produces rosettes of leaves and an inflorescence on a long rigid scape.
Silphium perfoliatum, the cup plant [2] or cup-plant, is a species of flowering plant in the family Asteraceae, native to eastern and central North America. It is an erect herbaceous perennial with triangular toothed leaves, and daisy-like yellow composite flower heads in summer. [3] The specific epithet perfoliatum means "through the leaf." [4]
Hedge bindweed is an herbaceous perennial that twines in a counter-clockwise direction to a height of up to 3 m (10 ft). The leaves are arranged alternately on the spiralling stem; they are dull green above and paler below, simple and sagittate (arrowhead shaped), 5–10 cm (2–4 in) long and 3–7 cm (1 + 1 ⁄ 4 – 2 + 3 ⁄ 4 in) broad.