Something that's Implausible is farfetched or unlikely. If it's 3pm and you still have to study for three exams and write an essay before midnight, its implausible that youll also have time to watch a movie. The adjective implausible breaks down into im, meaning not, and plausible, meaning likely.
Early lilac (Syringa oblata), a variety of lilac bush, is a deciduous shrub. Growing 10 to 12 feet tall and 8 to 10 feet wide, early lilac bushes have medium texture and an upright form. The fragrant flowers appear on 2- to 5-inch-long panicles that emerge in late spring.
Another compact lilac is the cultivar often called the 'Dwarf Korean Lilac'. This lilac, S. meyeri 'Palibin', is in fact a dwarf, but it is a cultivar of a Chinese, not a Korean species. It has little, rounded leaves and small flowers on a plant seldom more than 4 to 5 feet tall.