Obama does subscribe to a civic metaphysics, but it is centered instead on the bonds between people and the perennial American ability to change.
Alfalfa (Medicago sativa) is an important forage crop in North America owing to its high biomass production, perennial nature and ability to fix nitrogen.
The population ecology of many wild perennials reduces their ability to respond quickly to directional selection, a process that requires a population to quickly shed genetic diversity.
More pertinently, perhaps, does Corbyn – the perennial backbencher – have the ability to see through either path?
Yes, normal service was finally resumed in the Bundesliga on Saturday: Karlsruhe's Wildpark saw the timely return of the "Bayern-Dusel", the perennial champion's mythical ability to bag maximum points with half-decent, instantly forgettable displays.
Once the love affair kicked in, I identified our newfound treasure as Epimedium x versicolour "Suphureum", a reliable and long-lived perennial known for its ability to deal with dry shade.
The ability of perennial plants to persist and spread clonally in the absence of seed production provides a powerful mechanism to overcome even strong fertilization barriers and runs counter to the recognition species concept.
They are relatively long-lived perennials that have the ability to reproduce asexually by vegetative propagation of rhizomatous stems.
If the herb can survive winter (i.e. it is a perennial with over-wintering abilities), cut the stems at the base of the plant.
Perennial grasses differed in their ability to affect B. tectorum biomass (Table 2c, Fig. 2b), but tolerance and competitive effect were not tightly linked.
