Flora of North America Glossary
Displaying 1926-1950 of 2673
| Term | Synonyms | Category | Limitation | Definition |
|---|---|---|---|---|
| repand | margin | Gently or shallowly sinuate. | ||
| repent | = creeping | habit | axis | Procumbent and rooting adventitiously at intervals along its length. |
| replicate | vernation | Each with the distal portion of its blade recurved, paralleling and contiguous with the proximal portion. | ||
| replum pl. repla | < dissepiment, septum | STRUCTURE | The persistent wall or partition that separates the two locules of a silicle or silique. | |
| reproduction | CHARACTER | Type, morphology, disposition, function and/or dissemination of reproductive structures. | ||
| resin | SUBSTANCE | A substance of high molecular weight consisting of organic acids, esters, and/or terpenes, produced within plant tissue and exuded from wounds as a liquid that hardens to an amorphous glassy state upon exposure. | ||
| resinous 1 | coating | Of liquid or hardened resin. | ||
| resinous 2 | texture | Having the consistency of resin. | ||
| resupinate | orientation | lateral structure | Inverted due to twisting distal to the point of insertion during development. | |
| reticulate 1 | = anastomosing, net-like, netted | architecture | tertiary and higher-order laminar veins, excl veinlets | Interconnecting more or less regularly. |
| reticulate 2 | = netted | coloration | Having a pattern of interconnected fine lines of contrasting hue and/or intensity. | |
| reticulate 3 | = netted | relief | Having prominulous, more or less regularly interconnected lines. | |
| reticulodromous | venation | Having a single median primary vein that branches to either side along the length of the lamina, the secondary veins running thence toward the margin, branching repeatedly, becoming less distinct, and yielding a dense higher-order reticulum near the margin. | ||
| retrorse | orientation | Directed generally backward, toward the proximal end of the context of reference, parallel or at an acute angle to the bearing structure. | ||
| retuse | apex | Round overall with an obtuse terminal sinus. | ||
| revolute 1 | margin | Rolled inward abaxially. | ||
| revolute 2 | vernation | Each rolled abaxially inward from the lateral margins. | ||
| rhachilla | STRUCTURE | See rachilla. | ||
| rhachis | STRUCTURE | See rachis. | ||
| rhipidiate | architecture | inflorescence | Comprising one or more rhipidia. | |
| rhipidium pl. rhipidia | nominative | inflorescence | A cyme with the branches alternate and disposed in two opposite ranks along the main axis, the whole fan-like. | |
| rhizoid | STRUCTURE | Any structure that is similar to a root in appearance and function but that is not a true root ontogenetically and anatomically, especially one produced from a gametophyte thallus. | ||
| rhizomatous | architecture | plant | Having rhizomes. | |
| rhizome | = rootstock | STRUCTURE | An underground, usually horizontal stem, often superficially resembling a root but easily distinguished by the presence of nodes, from which it branches exogenously to produce the aboveground portion(s) of the shoot. | |
| rhizophore | STRUCTURE | A stem branch that bears no leaves and from which roots eventually arise; esp. in Selaginellaceae. |
Displaying 1926-1950 of 2673