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Verbena hastata OOR

Verbena hastata OOR

Verbena hastata OOR

The flowers are often a pretty shade of blue-violet, but they are small in size. Among the various Verbena spp. in Illinois, Blue Vervain (Verbena hastata) is easy to identify because it is the only vervain with elegant spikes of flowers in this color range. Other Verbena spp. within the state, excluding introduced cultivated species, have white, pink, or lavender flowers.

Hastata

Verbena hastata (American Blue Vervain) is a tall, upright, clump-forming perennial adorned with spikes of small lavender purple flowers borne on tall, branched, candelabra-like stems. Blooming from early summer to fall, the blossoms open from the bottom upwards for a long-lasting display. Bumblebees are among the important pollinators. They attract butterflies and birds as well. They rise above the foliage of lance-shaped, sharply toothed, green leaves. An attractive perennial for the wildlife garden, the border, along streamsides and at pond edges. Verbena hastata is a tall plant reaching over 6 feet in height. The alternate leaves are dentate. The multiple flowering spikes are dense with overlapping purple flowers. The fruit consists of four nutlets in a persistant calyx. With the large numbers of flowers per flower spike, a very large number of nutlets is produced. Compared to Verbena macdougalii, a very similar species, the flower spikes of Verbena hastata are much slimmer and the stem hairs of V. hastata are appressed to ascending compared to the spreading stem hairs of V. macdougalii. Verbena hastata is found in moist swales at middle elevation.

The flowers are often a pretty shade of blue-violet, but they are small in size. Among the various Verbena spp. in Illinois, Blue Vervain (Verbena hastata) is easy to identify because it is the only vervain with elegant spikes of flowers in this color range. Other Verbena spp. within the state, excluding introduced cultivated species, have white, pink, or lavender flowers.V. hastata is an upright, clump-forming perennial with narrow leaves up to 15cm long. Spikes of small, violet-blue to pinkish-purple flowers are carried on tall, branched, candelabra-like stems from early summer to early autumn (Source: www.rhs.org.uk)

 

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