In the spring, species such as European wood anemone, common wood sorrel and false lily of the valley are blooming.

Among the forest of water tanks and greenhouses that top city roofs, a new species has bloomed.

This species grows to about the same size, but blooms a month later.

The native species, Hamamelis virginiana, bloomed last month, while the showier hybrids of the Oriental species will bloom in late winter and early spring.

Most species bloom in summer months.

These rare species, nourished by fungi, live and bloom in the soil.

The species last bloomed in New York in 1939 in the Bronx.

Over fifty species of wildflowers bloom in the spring.

Most species under cultivation will bloom without the naturally imposed drought and wet that occurs in nature.

But different species bloom at different times, so it is possible to have alliums in flower for several weeks in the spring.