Displaying 1051 - 1075 out of 1575 Object(s)
| Term | Definition | |
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| Perfoliate | Referring to a stem that with two leaf bases that are completely fused together, i.e., the leaves look as if their bases grew through the leaves. |
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| Perforate | Provided with holes; e.g., the leaves of some species of Monstera (Araceae). |
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| Perianth | The collective term for the calyx and the corolla, even when they are not differentiated (i.e., represented by tepals). |
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| Pericarp | The wall of the fruit, which is usually made up of three layers: exocarp, mesocarp, and endocarp. |
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| Periderm | Protective tissue located on the outside of stems, branches, and roots, consisting of the phellogen or cork cambium, the phellem or cork to the outside, and the phelloderm to the inside. Same as cork. |
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| Perigynium | A sac-like structure surrounding the ovary of some Cyperaceae, e.g.. Carex. Same as utricle. |
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| Perigynous ovary | Referring to a flower in which the sepals, petals, and stamens arise from the rim of a cuplike hypanthium surrounding the ovary. |
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| Persistent | Referring to a structure that remains attached. Opposite of deciduous. |
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| Personal equipment | The personal equipment needed for doing prolonged expeditions to the neotropics. Access the attached PDF for a list of essential personal equipment used by the senior author of this glossary. For more information about plant collecting see Tropical Plant Collecting: From the Filed to the Internet. This book can be purchased at: http://tecceditora.com/ or Amazon.com. | |
| Perula (plural = perulae, adj. = perulate) | A scale of a leaf bud. The same as bud scale. |
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| Petal | An outermost segment of the corolla. |
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| Petal apex reflexed | A petal apex that turns abruptly inward. |
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| Petal lobe | A lobe of the corolla that arises from the corolla tube. |
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| Petiole | The stalk of the leaf blade. The petiole and blade together equal the leaf |
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| Petiole | The stalk of a leaf; in compound leaves, the stalk between the leaf attachment on the stem and the insertion of the first leaflet. |
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| Petiole cross-section | A section of a petiole made at right angles to its length just below the start of the blade. |
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| Petiolule | The stalk of a leaflet. Several different orders of petiolules may exist in leaves twice or more compound; those in a palmately compound leaf radiate from a common central point. |
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| Phanerocotylar cotyledons | A type of seed germination in which the cotyledons emerge from the seed coat. Compare with cryptocotylar. |
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| Phellem | A layer of suberized cells produced outwardly by the cork cambium. |
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| Phelloderm | A layer of parenchyma produced inwardly by the cork cambium. |
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| Phellogen | See cork cambium and periderm. |
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| Phenology | The timing of vegetative and reproductive events in plants and their relationships with abiotic and biotic factors, e.g., flowering times in relationship with seasonal rainfall. | |
| Phloem | The food-conducting tissue of vascular plants. In most woody plants, the inner bark is phloem. |
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| Phloem arms | A segment of cross-shaped or star-shaped phloem as seen in cross (= transverse) section in some lianas, especially species of Bignoniaceae. |
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| Phorophyte | .A plant, most often a tree, upon which an epiphyte grows. |
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