Showing posts with label ladies' tresses. Show all posts
Showing posts with label ladies' tresses. Show all posts

Friday, April 15, 2011

Hooded Ladies'-tresses (Spiranthes romanzoffiana)

This wide ranging species is found across Alaska and Canada, in the northern and western United States and even in Great Britain and Ireland.  It is the most commonly-met Spiranthes in the Pacific Northwest.  It is somewhat variable in coloration but is unlike any other species in this genus.

The plants are said to grow as tall as 50 cm, but where we have found them, at higher elevations, they have always been very short, less than 20 cm.  The plants usually has quite a few leaves which are found on the lower part of the stem and which persist through flowering.

The flowers are a beautiful off-white color and have a sparkling texture, and are arranged in spiralling rows, like all the Spiranthes, around the flower stem.  The plant likes wet, open areas.  At Mount Adams, for example, we found it growing in a very wet meadow among short grasses.



Western Ladies'-tresses (Spiranthes porrifolia)

This lovely species ranges from Washington south to California and east to Montana and Nevada.  It is not uncommon, but is found in only one site in Washington state, where these pictures were taken.  It is at the northern limit of its range in Washington.

The name, Ladies' Tresses, the common name of all the Spiranthes refers to the braided appearance of the flower spikes.  The individual flowers are arranged in such a way that they spiral around the stem, giving a braided appearance.

This species is 30-40 cm tall in the Washington location, grows in loose clumps, and has three or four leaves at the base of stem.  The flowers are creamy white and usually grow in damp areas with good drainage.  The individual flowers are only 1 cm in size but each spike holds up to 50 or 60 of the flowers.