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It has thick, spiky leaves and steel blue or white flowers that resemble thistle plants. The plant gets its name because the foliage resembles holly leaves, while it thrives in coastal areas or in ...
The flowers are tubular in shape, produced on a tall spike, and vary in colour with species, from purple to pink, white, and yellow. The name derives from the Latin word for "finger". [4] The genus was traditionally placed in the figwort family, Scrophulariaceae, but phylogenetic research led taxonomists to move it to the Veronicaceae in 2001. [5]
The large flower spike of Agave chiapensis, San Francisco Botanical Garden. The succulent leaves of most Agave species have sharp marginal teeth, an extremely sharp terminal spine, and are very fibrous inside. [6] The stout stem is usually extremely short, which may make the plant appear as though it is stemless.
The flowers are pale lilac, produced on spikes 2–5 cm long at the top of slender, leafless stems 20–50 cm long. Flowers from June to September, depending on weather. The fruit is a nut, indehiscent, monosperm of hardened pericarp. It consists of 4 small nuts which often remain locked inside the calyx tube. Grows from 0 to 1,700 m amsl. [4]
The basic framework is a panicle, The ultimate twigs are spikes, but not with individual flowers, but about fifty tiny umbels of 8 to 20 flowers each. H. ingens is another monocarp. Harmsiopanax may be the only genus which combines three types of inflorescence. Largest thyrse. Maypole Tree (Sohnreyia excelsa) Rutaceae. Amazon Basin
The family Poaceae has a peculiar inflorescence of small spikes organised in panicles or spikes that are usually simply and improperly referred to as spike and panicle. The genus Ficus ( Moraceae ) has an inflorescence called a hypanthodium, which bears numerous flowers on the inside of a convex or involuted compound receptacle. [ 11 ]
A spike is an unbranched, indeterminate inflorescence, similar to a raceme, but bearing sessile flowers (sessile flowers are attached directly, without stalks). [2] Examples occur on Malabar nut ( Justicia adhatoda ) and chaff flowers (genus Achyranthes ). [ 3 ]
Thlaspi arvense is a foetid, hairless annual plant, growing up to 60 cm (24 in) tall, [2] with upright branches. The stem leaves are arrow-shaped, narrow and toothed. It blooms between May and July, with racemes or spikes of small white flowers that have 4 sepals and 4 longer petals. [3]