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It flowers very profusely, [50] and the large flower heads are borne on stalks 5–9 cm (2–3.5 in) above the foliage. Unlike other forms, the stems wither and die naturally after flowering, making way for more new growth and flowers. [51] The flower heads are golden yellow and measure 6 cm (2.5 in) across. [7]
Eriophyllum confertiflorum, commonly called golden yarrow or yellow yarrow, [2] is a North American species of plant in the family Asteraceae, native to California and Baja California. It has wooly leaves when young, and yellow flower heads. [ 3 ] "
The flower heads are usually of the radiate type (typical daisy flower heads with distinct ray and disc florets) but sometimes discoid (with only disc florets of mixed, sterile, male and types). Only ray florets are female, others are male, hermaphroditic or entire sterile. Head involucres are campanulate to cylindric or attenuate.
One plant can produce as many as 1500 small yellow flower heads in a large conical array. The involucres of the main subspecies (S. a. subsp. altissima) are usually 3–4 millimeters, whereas those of S. a. subsp. gilvocanescens are usually 2–3 mm. [6]
In late summer it bears clusters of small golden yellow flower heads on the ends of the stems. The flower heads are about 15 mm (1 ⁄ 2 in) across and have 3–5 golden-yellow ray florets. [5] The flowers are hermaphroditic (have both male and female organs) and are pollinated by insects. [6]
Inflorescence in bloom. Solidago canadensis, known as Canada goldenrod or Canadian goldenrod, is an herbaceous perennial plant of the family Asteraceae. [2] It is native to northeastern and north-central North America [3] and often forms colonies of upright growing plants, with many small yellow flowers in a branching inflorescence held above the foliage.
The flowers are arranged in oval to more or less spherical heads of 40 to 200 flower-like partial heads. Each partial head consists of three to eight small flower-like "florets". The florets and the bracts which surround them are yellow or golden in colour. Each flower has five petals joined to form a tube.
Atop each of the many erect branches is an inflorescence of several golden yellow flower heads, each with few or up to 70 disc florets and sometimes a few short ray florets. [4] [5] Varieties [1] [4] Ericameria cuneata var. cuneata - California; Ericameria cuneata var. macrocephala Urbatsch - San Diego County in California