Archive for the ‘Botany for Gardeners’ Category

Friday, August 21, 2009

Mysterious Cucubalus

Cucubalus baccifer in flower Detail from The Unicorn Is Killed and Brought to the Castle Cucubalus baccifer in fruit

Above, left to right: Berry-bearing catchfly (Cucubalus baccifer) flowering in a shady bed in Bonnefont Garden in July; a detail from the foreground of The Unicorn is Killed and Brought to the Castle showing the catchfly in flower and fruit behind the forelegs of a hunting dog; the shiny black fruits, which give the berry-bearing catchfly its name, ripening in August.

Berry-bearing catchfly (Cucubalus baccifer) is a pretty, lax-stemmed little plant that scrambles over and through the hellebores, ferns, and other shade-loving plants growing in a small bed under the east wall of Bonnefont Garden. We would be hard put to find a home for it anywhere else in Bonnefont, which is organized by use, since we haven’t been able to document either any medieval medicinal applications or any magical or symbolic attributes associated with it. Read more »

Friday, May 29, 2009

Arum Scarum

Dragon arum in Bonnefont garden Dragon arum flower Dragon arum stems

Above, from left: dragon arum (Dracunculus vulgaris) growing in Bonnefont garden; detail of the spathe and spadix common to arums; detail of the reptilian markings on the stems.

Arums and other members of the botanical family Araceae are fly pollinated, and their flowers imitate both the color and the smell of rotting meat in order to attract pollinators. The little cuckoo-pint featured in last week’s post is by no means the most fetid member of the family. Cuckoo-pint’s enormous tropical cousin, Amorphophallus titanum, notorious for its overpowering stench, is native to Sumatra.  The titan arum is also cultivated in conservatories and gains worldwide attention when it blooms in botanical gardens like Kew. Read more »

Friday, May 22, 2009

Adam and Eve and Arum

Arum maculatum Detail from The Unicorn in Captivity Arum italicum in Flower

Above, from left: Cuckoo-pint (Arum maculatum) growing in Bonnefont Garden; Detail from The Unicorn in Captivity that shows cuckoo-pint growing within the enclosure; Italian arum, (Arum italicum) growing in Bonnefont Garden.

Of all the spring-blooming “cuckoo plants” (see “Sumer is Icumen In,” April 3, 2009) associated not only with the bird but with magic, sexuality, snakes, and death, the cuckoo-pint or wake-robin is the most famous. Read more »

Friday, May 15, 2009

White Coral Bells . . .

Another Look at Lily of the Valley

Above: Lily of the valley (Convallaria majalis)

White coral bells upon a slender stalk
Lilies-of-the-valley deck my garden walk. . . .

—Traditional English Round

In spite of its medieval association with the exotic Queen of Sheba (see last week’s post), this modest, northern European woodland flower is actually as easy to grow as it is familiar. Read more »

Friday, March 27, 2009

Bulb Basics

Madonna Lily (Lilium candidum) Cyclamen (Cyclamen persicum) Saffron Crocus (Crocus sativus)

Above, from left to right: Madonna lily (Lilium candidum), cyclamen (Cyclamen persicum), and saffron crocus (Crocus sativus) in Bonnefont Herb Garden.

Many bulbous plants are grown in the gardens of The Cloisters throughout the seasons. In addition to their place in the collection as medieval species, they prolong the garden’s ornamental value, often blooming when there are no other flowers to be seen. The snowdrops (Galanthus nivalis) enliven Bonnefont Herb Garden while there is still snow on the ground. Certain bulbous plants, like the fall-blooming saffron crocus (Crocus sativus), possess a rich history that our garden lecturers are eager to discuss. However, the saffron crocus is actually not a true bulb, but actually what is known as a “corm.” Read more »

Friday, March 20, 2009

Getting the Most Out of Forced Bulbs

Assorted Bulbs Spent Daffodils

Left: Assorted bulbs; right: Spent daffodils (Narcissus pseudonarcissus ssp. obvallaris).

In the world of horticulture, the threshold between late winter and early spring is synonymous with forcing bulbs. Even if you don’t force your own, chances are you have received a pot of forced bulbs as a gift. Either way, you’re probably wondering what to do with the bulbs once the flowers have finished blooming. Many people discard them. However, with a little effort and luck, you can enjoy most forced bulbs well into the future. Read more »

Thursday, October 2, 2008

The Fragrant Family of Fennel

Anise (<i>Pimpinella anisum</i>) in flower, Bonnefont Herb Garden Anise (<i>Pimpinella anisum</i>) in seed

Left: Anise (Pimpinella anisum) in flower, Bonnefont Herb Garden; right: Anise (Pimpinella anisum) in seed, Bonnefont Herb Garden.

Representatives of the Apiaceae family are scattered throughout all of the gardens at The Cloisters, but they are most prominent in the culinary beds of Bonnefont Herb Garden. These plants are greatly exploited for their distinct fragrances and tastes. The essential oils, created from a fairly large group of chemical constituents within the plants, are responsible for the incredibly flavorful and aromatic properties of this family. In addition, these properties help to ensure the survival of plants in this family by attracting pollinators to the flowers. Read more »

Wednesday, August 27, 2008

The Last of the Thistles

Carlina acaulis growing in Bonnefont Garden.

Since we have received appreciations from so many thistle lovers, I thought I would finish out the series with the carline thistles, the last thistles in our medieval plant collection to bloom. Unlike other thistles, their flowers have a daisy form consisting of a disk with rayed petals. They are dry flowers of the “ever-lasting” type, sometimes described as straw flowers. The carline thistles are plants of poor, dry soils. The U.S.D.A. lists the common carline thistle, Carlina vulgaris, as an invasive weed reported in New York and New Jersey, but no other state, although I have never observed them in either. Has anyone seen it in their locale? (The U.S.D.A. site notes that it is not necessarily the case that a plant is established only in the states indicated by shading on their map. It may well grow elsewhere, but its presence has not been reported to the U.S.D.A.)

The perennial stemless species, Carlina acaulis, native to Europe, strongly resembles the closely related Eurasian biennial Carlina vulgaris, except that the rosette of spiny leaves lies close to the ground, while the common carline thistle has a short stem. The leaves of C. acaulis are also longer than those of C. vulgaris. Read more »

Thursday, August 7, 2008

Weed Control

Anagalis arvensis is a weed that produces an advanced root system to ensure its survival. Datura stramonium relies primarily on seed for reproduction.

Left: Anagallis arvensis, a weed that produces an advanced root system to ensure its survival; right: Datura stramonium, a vigorous weed that relies primarily on seed for reproduction.

A weed is defined in the most simple manner as a plant growing in an area where it is unwanted. This could apply to a garden, a farm, or any possible landscape where a plant may appear. Plants may be considered unwanted based on ornamental value or their competitiveness with desired plants. Plants within the same community often compete for water, nutrients, and physical space. Unfortunately, it is the weed that most often wins, followed by a reduction in crop yields and garden aesthetics. It is in these situations, that weed control is most often practiced. Read more »

Friday, July 18, 2008

The Thistle Tribe

Cotton thistle flourishing in Bonnefont Garden. The leaves of the cotton thistle are thickly felted with white down.

The most imposing of the several thistles we cultivate at The Cloisters, the stately cotton thistle has a presence that appeals to modern sensibilities. The silvery-white leaves are deeply cut and very handsome: the species name acanthium denotes their resemblance to the foliage of the acanthus. Some value cotton thistle as an ornamental in contemporary gardens, although others consider Onorpordum acanthium to be a weed. (A weed is a plant you don’t want, while an herb is a plant with a use. Many of the plants we grow in the gardens of The Cloisters are considered weeds in our time and place, but were herbs in the Middle Ages.) Once the purplish-pink flowers of the cotton thistle have withered, it is important to remove the heads so that the many seeds do not disperse to the four winds and colonize the world. Read more »