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The name Ballota comes from the Greek ballo (to reject), because of the strong offensive odor of the plant; cattle will not eat it. The specific name nigra could refer to the black colour of dried leaves. The common name comes from the Old English words har, meaning "downy or hoary", and hune, meaning the plant itself. This name refers to the ...
These illustrations depicted a vast array of European and exotic plants, often accompanied by detailed annotations on plant anatomy, including flowers, leaves, seeds, and fruits at various stages of development. While a few drawings were done in black ink or pencil, most were finely enhanced with watercolor.
A perennial plant, Arum palaestinum grows up to 10–25 cm (4–10 in) high. It blooms between the months of March and April, by which time the plant is easily recognized by its dark purplish-black spadix enclosed by a reddish-brown spathe. [3] [4] The leaves are light green, narrow, and upright with a purplish-black color. The root is tuberous.
Black mustard plants in Saarbrücken Black mustard fruits at the Jardin des Plantes de Paris Black mustard seeds. It is an upright plant, growing to 70 centimetres (28 in) in width [2] and up to 1.2 metres (4 ft) tall in moist, fertile soil. The large stalked leaves are covered with hairs or bristles at the base, with smoother stems. [3] [4] [5]
Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
The plant is very slow growing and trunks only start appearing after many years. The long, narrow leaves are crowded together at the tops of the trunks. [2] X. australis takes several years to flower, and it does not always flower annually, but in the season after a bushfire it flowers prolifically. The flowers appear on a spear-like spike ...
The leaves are 2.5–10.2 centimetres (1–4 inches) long and toothed towards the tips. They are alternately arranged , and the undersides are whitish with prominent veins. Large clusters of small, deep pink flowers form spires in early summer, later turning dark and persisting.
Rudbeckia hirta is an upright annual (sometimes biennial or perennial) growing 30–100 cm (12–39 in) tall by 30–45 cm (12–18 in) wide.It has alternate, mostly basal leaves 10–18 cm long, covered by coarse hair, with stout branching stems and daisy-like, composite flower heads appearing in late summer and early autumn.