Flora of North America Glossary
Displaying 1701-1725 of 2673
| Term | Synonyms | Category | Limitation | Definition |
|---|---|---|---|---|
| peripterous | solid shape | Alate with a single transversely encircling wing. | ||
| perisperm | STRUCTURE / SUBSTANCE | A genetically diploid (2n chromosomes) nutritive tissue in a seed; containing stored carbohydrate and/or oil utilized by the embryo prior to and especially upon germination; derived from the nucellus. See also endosperm (albumen). | ||
| persistent | duration | structure | Remaining attached and conspicuous until the bearing structure reaches maturity. | |
| personate | = gaping, ringent | architecture | corolla | Bilabiate with the upper lip inwardly arcuate, the lower lip prominent and appressed to the upper at the level of the throat or junction of tube and limb, which is thus normally occluded but which gapes, resembling an open mouth, when the whole is compressed laterally. |
| perulate | architecture | bud | Having outer scales that enclose and protect the embryonic components, from which they differ significantly in texture, shape, size, relief and/or vestiture. See also naked. | |
| petal | STRUCTURE | One of the one or more constituent members of a corolla; colored and showy in many taxa, inconspicuous in size and/or color in others; may be distinct or else connate with one or more others, and/or may be free or else adnate to one or more other floral structures. | ||
| …petaled | = …petalous | architecture | flower, perianth, corolla | Having the number of petals indicated by the prefix; as in five-petaled. |
| petal-like | = petaloid | architecture | structure | Resembling a petal in shape, texture and color. |
| petaloid | = petal-like | architecture | structure | Resembling a petal in shape, texture and color. |
| …petalous | = …petaled | architecture | flower, perianth, corolla | Having the number of petals indicated by the prefix; as in pentapetalous. |
| petiolar | insertion | Upon or otherwise directly associated with the petioles. | ||
| petiolar | position | Upon or otherwise directly associated with the petioles. | ||
| petiolate | < stalked | architecture | leaf | Having a petiole. |
| petiole | < stalk, stipe (broad sense, not recommended) | STRUCTURE | The stalk, when present, of a leaf. | |
| petiolulate | < stalked | architecture | leaflet | Having a petiolule. |
| petiolule | < stalk | STRUCTURE | The stalk, when present, of a leaflet, analogous to the petiole of a leaf. | |
| phanerocotyloid | germination | seed | Having the cotyledon(s) emerging from the seed coat. | |
| phyllary | = involucral bract; < bract (broad sense) | STRUCTURE | One of the bracts composing the involucre of a capitulum (head); in Asteraceae (Compositae). | |
| phylloclade | = cladode, cladophyll | STRUCTURE | A stem segment that functions as a leaf; often more or less compressed. | |
| phyllode | = phyllodium | STRUCTURE | A leaf deemed to consist entirely or almost entirely of tissues evolutionarily derived from the petiole, all or a distal portion of which has become expanded and blade-like, the original blade reduced to the point of absence or vestigiality. | |
| phyllodium pl. phyllodia | = phyllode | STRUCTURE | A leaf deemed to consist entirely or almost entirely of tissues evolutionarily derived from the petiole, all or a distal portion of which has become laminar, the original blade reduced to the point of absence or vestigiality. | |
| phyllopodium pl. phyllopodia | STRUCTURE | A stem-like axis composed of fused leaf bases; esp. in Arecaceae (Palmae), Musaceae. | ||
| piliferous | apex | Having a distinct, fine, weak, hair-like portion or protrusion. | ||
| pilose | pubescence | Bearing relatively sparse, soft, slender, more or less erect capillate trichomes. See also pilosulous. | ||
| pilosulous | pubescence | Finely pilose. |
Displaying 1701-1725 of 2673