Displaying 1326 - 1350 out of 1575 Object(s)
| Term | Definition | |
|---|---|---|
| Spathe | A conspicuous bract that subtends or surrounds a spadix; in the Araceae, the lower part is called the tube and the upper part the blade; in Arecaceae the large, often woody bract derived from either the prophyll or peduncular bract. |
|
| Spatulate (spathulate) | Shaped like a spatula, rounded above and narrowed to the base. |
|
| Spike | An indeterminate, unbranched inflorescence with sessile flowers and the uppermost flowers the youngest. Compare with raceme. |
|
| Spikelet | A small secondary spike, such as the basic unit of the inflorescence of Cyperaceae and Poaceae; a spikelike branch of a compound inflorescence of the Bromeliaceae. |
|
| Spine | A sharp-pointed modified leaf as in most species of Cactaceae . In the palm family (Arecaceae) all sharp outgrowths, regardless of origin, are called spines. |
|
| Splitter | A person (usually a plant taxonomist) that recognizes species of plants with narrow morphological variation included in their concept of species. This often results in the recognition of species based on features that would be considered intraspecific variation by lumpers. This narrow concept of species is called splitting of species. |
|
| Spongy mesophyll | Referring to loosely group, unorganizedof cells located located between the palisade mesophyll and the abaxial epidermis. Photosynthesis takes place in both palisade and spongy mesophyll. |
|
| Sporangium (plural = sporangia) | A chamber in which spores are produced. |
|
| Spore | A reproductive cell produced by non-flowering plants (e.g., mosses, liverworts, ferns) and fungi). |
|
| Sporophyte | The spore-producing, diploid (2n) phase of a plant’s life cycle. Compare with gametophyte. |
|
| Sport | An offshoot of a branch or other part of a plant that is morphologically different from the remainder of the plant. |
|
| Spreading aril | Referring to an aril that spreads around the entire seed and, thus, looks like a sarcrotesta. |
|
| Sprout | A secondary shoot arising from the base of a tree or shrub. Preferred over sucker. |
|
| Spur | A tubular, usually nectar-producing outgrowth of a part of a flower; e.g., part of the sepal in some Vochysiaceae. |
|
| Squama (pl. = squamae, diminutive = squamella, adj. = squamate) | Scale; covered with scales. |
|
| Squama (plural = squamae, diminutive = squamella, adjective = squamate) | A scale. |
|
| Stalked vestigial stamens | Vestigial stamens that are constricted at the point they are attached to the ligule. |
|
| Stamen | The male part of the flower comprised of the filament and the anther; in the Lecythidaceae stamens are found attached to the staminal tube in those genera that have one (Allantoma, Cariniana, Grias, and Gustavia) and, as far is known, to the staminal ring of species with zygomorphic flowers. Stamens associated with the ligule are hypothesized to be staminodes bearing antherodes and not anthers. |
|
| Stamen | The male part of the flower comprised of the filament and the anther. |
|
| Stamens | The male part of the flower comprised of the filament and the anther. |
|
| Staminal lip | A rim around the adaxial side of the staminal ring. |
|
| Staminal rim | The upper edge of the staminal tube in species of Allantoma, Cariniana, Grias, and Gustavia. |
|
| Staminal rim oblique | The circular apex of a fleshy staminal tube upon which the stamens arise from slightly different levels, e.g., in some species of >Grias. |
|
| Staminal ring | A ring of stamens surrounding the pistil at the summit of the ovary. |
|
| Staminal ring lip | In zygomorphic-flowered Lecythis, a flap of tissue that extends beyond the insertion of the stamens on the lateral and anterior parts of the staminal ring. |
|