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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 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.
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]
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]
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
The inflorescences along the top parts of the stem branches are clusters of four or five flower heads. [8] Each head is a capsule encased in bumpy, glandular greenish phyllaries bearing many golden yellow disc florets at its mouth. Each disc floret is somewhat cylindrical and protruding. [7]
The flowerheads have up to seven golden yellow flowers, each 25–45 mm (0.98–1.77 in) in diameter with five petals. [4] It flowers between late May and August. [ 5 ] Each flower has numerous stamens (up to 650) and three-parted ovaries which, at maturity, form an ovoid capsule and blackish-brown seeds.