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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.
Prickles and thorns are an evolved defense against herbivores — animals that eat plants — and can also aid in growth, plant competition and water retention, according to the study. It was ...
The spines are the relatively large, radiating organs; the glochids are the fine prickles in the centres of the bunches. Glochids ( Opuntia microdasys monstrose ) Glochids or glochidia ( sg. : "glochidium") are hair-like spines or short prickles, generally barbed, found on the areoles of cacti in the sub-family Opuntioideae .
A plant's leaves and stem may be covered with sharp prickles, spines, thorns or trichomes- hairs on the leaf often with barbs, sometimes containing irritants or poisons. Plant structural features such as spines, thorns and awns reduce feeding by large ungulate herbivores (e.g. kudu , impala , and goats ) by restricting the herbivores' feeding ...
Aculeate – having a covering of prickles or needle-like growth. Aculeolate – having spine-like processes. Aden – a gland. Adenoid – gland-like. Adenophore – a stalk that supports a gland. Adenophyllous – leaves with glands. Arachnoid – having entangled hairs that resemble cobwebs. Bloom – waxy coating that covers some plants.
Rubus pensilvanicus is a 8 foot tall perennial bramble armed with sharp prickles along its stems. [7] The fruit is black to purple in color, fleshy in texture, and edible to humans and wildlife. [8] The leaf structure of Rubus pensilvanicus is characterized by compound leaves, composed of two or more discrete leaflets. Along the stem, there is ...
“There are many medications that may cause weight gain,” says W. Scott Butsch, M.D., director of obesity medicine in the Bariatric and Metabolic Institute at the Cleveland Clinic.
For example, the article says that spines are derived from leaves, but none of the four sources I listed at User:Peter coxhead/Work page#Spines vs. thorns restrict the term to leaf-derived structures. Also, the use of spinosus as an epithet is relevant; many plants with such names have what the article calls "thorns", e.g. Prunus spinosa.