"I'm just now finishing off the last of the grass, and when I'm done, there won't be a single blade left," Ms. Porter said as she showed off various vines, ground covers, perennials, patterned stones, even a curious-looking blue-flowering plant.
Several studies have suggested that annual plants have a faster rate of molecular evolution than perennials, a pattern generally attributed to the generation time effect (see [ 24, 40]).
This study finding is consistent with a Ugandan study, 25 which also found significant seasonal variation in recurrent parasitemia despite the perennial malaria transmission pattern in that study setting.
In the minds of Islamic radicals such as Osama bin Laden, all such episodes are slotted neatly into a pattern of perennial conflict between the world of the believers and that of the unbelievers.
Across the park road an annual garden was loaded with vivid yellow, red and cream tulips in a circular pattern; a perennial garden includes some 225 different plants, like Shasta daisy, Mt. Fuji phlox, Johnson's Blue geranium, Clara Curtiss chrysanthemum and peonies.
This suggests that the gene location pattern in perennial ryegrass may be similar to that observed in other plant species.
We discuss these different compositional patterns of perennial vegetation in neighborhoods and embedded parks in terms of their relationship to socioeconomic and disturbance gradients, and a conceptual framework of "top-down" and "bottom-up" human management influences.
Tree crops are an effective long-term measure to deal with drought, but farmers often opted for the expansion of perennial crops, changing production patterns, adjusting water management approaches in agricultural fields, sale of livestock, engagement in off-farm work, and migration for job opportunities.
Perhaps the choice is pectorals or muscly thighs rather than showing off both at once? Board shorts, like hibiscus patterns, are a perennial beach classic and are still easy to pick up on the high street.
What shakes out of all of this is the perennial tendency to find the patterns we are seeking, while missing the forest for the trees.
In the perennial Viola cazorlensis, cytosine methylation patterns were found to be partitioned and positively correlated with adaptive genetic variation [ 12].
