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The flower heads are 3–5 cm (1 + 1 ⁄ 4 –2 in) wide, [5] and usually light blue [6] or lavender; it has also rarely been described as white or pink. [5] Of the two rows of involucral bracts, the inner is longer and erect, the outer is shorter and spreading. It flowers from March until October. [6] The seed has small scales at the tip. [6]
This herbaceous annual or dwarf shrub grows to 0.3–1 m (1 ft 0 in – 3 ft 3 in) high, with ovate to triangular leaves 2–7 cm (0.79–2.76 in) long, and blue flowerheads (sometimes white, pink, or purple). The flower heads are borne in dense corymbs. The ray flowers are threadlike and fluff-haired, leading to the common name.
The cultivar 'Ugandense' is an untidy evergreen shrub growing to 4 m (13 ft) tall and 2.5 m (8.2 ft) broad, with oval leaves and masses of pale-violet blue butterfly-like flowers in summer and autumn. Each flower has a darker blue lower petal.
The plant is classified by several different botanical names. Both the current United States Department of Agriculture database and The Jepson Manual of California flora (2013) classify it as S. nigra subsp. cerulea. [1] [2] The Sunset Western Garden Book identifies the plant as Sambucus mexicana, and note use of S. caerulea also. [5] [6]
Ceanothus thyrsiflorus, known as blueblossom or blue blossom ceanothus, is an evergreen shrub in the buckthorn family Rhamnaceae that is endemic to Oregon and California in the US. The term 'Californian lilac' is also applied to this and other varieties of ceanothus, though it is not closely related to Syringa , the true lilac.
The principal phytochemicals are polyphenols in the leaves, stems, and roots of some Scutellaria species, including baicalin, baicalein, wogonin, and oroxylin A. [7] [8] [9] Other constituents include lateriflorin, melatonin, serotonin, viscidulin III-2’-O-glucoside, Chyrin-6-C-ara-glc, trans-verbascoside, viscidulin, trans-martynoside, oroxylin A-7-O-glc, wogonoside, chitin, and scutellarin ...
Key identification features include a dark, wiry, blue or purple stem, and flower heads in the leaf axils instead of in a large array at the top of the plant. [3] Prefers medium to part shade, and can often be found in wooded areas.
Lobelia siphilitica, the great blue lobelia, [3] great lobelia, [4] or blue cardinal flower, [5] is a plant species within the family Campanulaceae. It is an herbaceous perennial dicot native to eastern and central Canada and United States. There are two recognized varieties of Lobelia siphilitica, var. siphilitica and var. ludoviciana. [6]
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