Above is a shot of Veratrum tenuipetalum, the current name for the universal false hellebore of the Rocky Mountains. Some years vast fields of foliage dominate whole valleys with nary a one in bloom. Then, boom! One year there are flowers everywhere. Such a year was last year (2011): this picture was taken on Kebler Pass between Aspen and Crested Butte.
Here we have a closer shot--they are majestic. I assumed growing at high, cold valleys they would be a challenge to grow in the garden, but in 2009 we visited the Royal Horticultural Society's magnificent garden at Wisley and saw this grand specimen: Veratrum californicum, I believe:
And a few days later we saw this honker blooming at Kew: Veratrum nigrum occurs across a wide swath of Eurasia (we saw it in early June in the Altai of Kazakhstan!) in an amazing range of habitats from moist grasslands to dry woods. It is not nearly as massive as many of its white flowered kin (generally four or so feet tall), with gorgeous pleated leaves. It is amazing this is so rare in cultivation still...black flowers do have allure, as Paul Bonine reveals in his delightful book.
A rather lurid (and out of focus) closeup of the same...please hurry on!
Everything so far is really just preamble to my showing off my dinky and adorable tiny black hellebore: Veratrum formosanum is endemic to Taiwan, with the same dark blossoms as its more common cousin, only it usually grows well under 2' tall. The foliage is much narrower, and daintier altogether. You can see it fits in nicely into a rock garden. Although it thrives in a border as well...
Here is a picture of the flower stalk--you might describe the flowers as maroon, chocolate or just plain dark. They are fascinating to look into, and a complete contrast to everything else in the August garden. I have several of these in my rock garden, and this time of year they stand out in every sense of the word, despite their somber coloration. This deserves far greater popularity (if only there were some nurseries offering it).