![]() ![]() Stamen – The male part of a flower that produces pollen. Spur twigs – Short twigs held at a 90-degree angle from a branch that often end in a point and typically have strongly clustered leaves (see Saffron Plum as an example). Spines – Sharp projections in the leaf axils that are derived from stipules. Simple leaf – A leaf with a single blade. Sessile – Describes flowers and fruits attached directly to the branch, without a stalk. Segment – Referring to the leaflets of a palm. Ring scars – Obvious marks on the trunk of a palm where a leaf was formerly attached. Rachis – The central axis of a pinnate compound leaf. Prostrate – Lying flat on the ground – used to describe the trunk of a tree (examples include Saw Palmetto and Buttonwood). Prop roots – Aerial roots that arch out from the main trunk and act to provide extra stability to the tree (example – Red Mangrove). Prickles – Short, sharp projections that grow from the epidermis of a plant. Pistil – The female part of a flower that produces the seeds. Pinnate leaf – A compound leaf in which the leaflets originate from a central axis (rachis), feather-like. Petiole – The stem of a leaf that attaches it to the twig. Petal – Usually the leaf-like colored part of a flower some flowers lack petals. Palmate leaf – A compound leaf in which the leaflets share a common central point of origin, as in fingers projecting from a palm. Ovate – A leaf that has its widest portion towards the base and has a pointed apex (see obovate). Oval – A leaf that is widest in the middle, with a rounded base and apex. Opposite leaves – Two leaves grow from each node of the stem. Obovate – A leaf that has its widest portion towards the pointed apex (see ovate). Oblong – A leaf longer than broad, with the two longer margins parallel – similar to a rectangle – but with a rounded base and apex. Oblanceolate – A leaf shaped like a lance, but narrower toward the base and wider toward the apex (see lanceolate). Nut – A dry, single-seeded fruit, consisting of a kernel within a woody shell (example – Oaks). Naturalized – Said of a cultivated or non-native plant that becomes established in the wild without human help. Monoecious – Meaning one house – when a tree species has flowers with male and female parts on the same tree (see Dioecious). Lenticel – A pore for gas exchange usually on narrow trunks and branches. Leaf scars – Marks on the twigs and branches of a hardwood where a leaf was formerly attached. Leaflets – The several blades of a once-compound or twice-compound hardwood leaf. Lanceolate – A leaf shaped like a lance, narrow, wider at the base and pointed toward the apex (see oblanceolate). Invasive species – A plant (or animal) species that is not native, but has become established in a particular habitat, and tends to out-compete native species, often to a great degree (Melaleuca, Australian Pine, and Brazilian Pepper are examples).įissured – A description of bark that is characterized by raised vertical ridges alternating with depressions. Twice-compound leaf – Double leaflets grow from the rachis.Ĭrownshaft – A green cylinder of leaf bases at the top of the trunk in some palms (examples – Royal Palm Manila Palm).Ĭultivars – Different forms of the same species that have been developed by plant breeders, often focusing on the fruits (examples – Avocado, Mango, and many others).ĭioecious – Meaning two houses – when a species has male and female flowers held on separate trees (i.e., trees are either male or female see Monoecious).ĭrupe – A fruit with a fleshy outer portion and a hard inner portion that holds the seed(s) (example – Tallowwood).Įpiphyte – A plant that grows on the branches or bark of another plant but is not a parasite (example – Spanish Moss growing on Live Oak).Įlliptic – Describing a leaf that is widest in the middle and pointed at both ends, shaped like a football in outline. Once-compound leaf – Single leaflets grow from the rachis. Alternate leaf– One leaf grows from each node of the stem.Īpex – The tip of a leaf (apices is the plural form).Īxil – The angle between a stem or twig and an attached leaf.īase (basal) – The bottom of a tree or a leaf.īerry – A fleshy fruit in which the seeds are embedded (example – the Stoppers)Ĭatkin – A spike of flowers that may be upright or hang from the twig (example – Oaks).Ĭompound leaf – A hardwood leaf with smaller leaflets that share a common axis from the rachis (pinnate) or that share a common point of origin (palmate). ![]()
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