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A leaf ( pl.: leaves) is a principal appendage of the stem of a vascular plant, [1] usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", [2] [3] while the leaves, stem, flower, and fruit collectively form the shoot system. [4]
Being one of the more visible features, leaf shape is commonly used for plant identification. Similar terms are used for other plant parts, such as petals, tepals, and bracts. Oddly pinnate, pinnatifid leaves (Coriandrum sativum, coriander or cilantro) Partial chlorosis revealing palmate venation in simple leaves of Hibiscus mutabilis
Chrysanthemum – Dendranthema grandiflora [ vi], Chrysanthemum morifolium. (True) cinnamon – Cinnamomum verum. Clove – Syzygium aromaticum. Clover – Trifolium spp. Coakum – Phytolacca americana. Coconut – Cocos nucifera. Coffee plant – Coffea spp. Colic weed – Corydalis flavula. Collard – Symplocarpus foetidus.
Rape Kale. [33] [34] Brassica nigra. Black Mustard. Black mustard is commonly found in neglected gardens, on roadsides, in abandoned fields, and in areas where waste is disposed of. The plant is native to Asia and Europe, but now grows over much of southern Canada and almost all of the United States.
Phyllotaxis. Crisscrossing spirals of Aloe polyphylla. In botany, phyllotaxis (from Ancient Greek φύλλον (phúllon) 'leaf', and τάξις (táxis) 'arrangement') [1] or phyllotaxy is the arrangement of leaves on a plant stem. Phyllotactic spirals form a distinctive class of patterns in nature .
Glossary of botanical terms. This glossary of botanical terms is a list of definitions of terms and concepts relevant to botany and plants in general. Terms of plant morphology are included here as well as at the more specific Glossary of plant morphology and Glossary of leaf morphology.
water hemlock, cowbane, wild carrot, snakeweed, poison parsnip, false parsley, children's bane, death-of-man. Apiaceae. The root, when freshly pulled out of the ground, is extremely poisonous and contains cicutoxin, a central nervous system stimulant that induces seizures. [citation needed]
Pseudautoicous – dwarf male plants growing on living leaves of female plants. Pseudomonoicous – Pseudoperianth – an involucre that resembles a perianth, but is made of thallus tissue, and usually forms after the sporophyte develops. Rhizautoicous – male inflorescence attached to the female stem by rhizoids.