Archives For What’s in Bloom

Find out what’s in bloom now so you have plan your visit!

Wolfsbane is a beautiful—and poisonous—fall-blooming perennial. It also has a colorful history associated with werewolves, vampires, and witches.

PHOTO: Werewolf gargoyle at the Cathédrale Notre-Dame de Moulins

Werewolf gargoyle at the Cathédrale Notre-Dame de Moulins

The plant has been a familiar plot element in horror movies, television shows, and novels. In the Harry Potter series, Remus Lupin, a tormented werewolf, drinks a potion of wolfsbane carefully concocted to control his transformations. As early as Dracula in 1931, wolfsbane casually replaced garlic as a repellent for vampires in film. Nevertheless, the correlation of wolfsbane with the supernatural predates Hollywood and familiar authors. 

In Greek myth, wolfsbane (Aconitum) originated from the toxic slobber of a three-headed dog named Cerberus, the scary canine guardian to the gates of Hell. In the Dark Ages, wolfsbane was said to be used by witches in spells and potions and was one of several ingredients for an ointment that, when applied to a broom, could facilitate flight. Stories also proclaimed that a sorceress who carried wolfsbane seeds wrapped in lizard skin could become invisible and witches who applied the poisonous sap to their flints and launched them at unsuspecting enemies.

One thing both Hollywood and horticulturists can agree on: wolfsbane is a potent plant. Ingesting wolfsbane is typically fatal. 

PHOTO: Arends azure monkshood/wolfsbane.

Arends azure monkshood (Aconitum carmichaelii ‘Arendsii’)

PHOTO: Lamarck monkshood/wolfsbane.

Lamarck monkshood (Aconitum lamarckii)

The plant belongs to a genus of highly poisonous perennials known as monkshood or aconite. They naturally grow in mountainous areas across the northern half of the globe and are also planted in gardens for their deep purple blooms, which continue flowering long after other perennials fade for the season. Ancient Greeks hunted wolves by poisoning their bait with this plant, which lead to the common name of wolfsbane.

PHOTO: Werewolf illustration circa 1512 by Lucas Cranach the Elder

Werewolf illustration circa 1512 by Lucas Cranach the Elder

While those hunting traditions were lost, the plant retained its common name into the Middle Ages, where wolves and werewolves were a genuine fear in Europe. Frightened folks turned to growing wolfsbane for their protection, as superstitions said that werewolves could be repelled by the plant, or even tamed by it. Others, however, believed that having contact with wolfsbane on a full moon could actually cause shape-shifting. Patients who suffered from lycanthropy (the delusion of being a wolf) were prescribed regular—and often lethal—doses of wolfsbane by their medieval doctors.

For gardeners, it is important to remember to always wear gloves while handling a deadly plant such as wolfsbane.

Find wolfsbane at the Garden with our Plantfinder or on the GardenGuide app. Remember to look—don’t touch!—its beautiful blooms. Happy Halloween!


©2016 Chicago Botanic Garden and my.chicagobotanic.org

Each fall, we sing the praises of fall allium and autumn crocus blooms. This year, however, a special mention must be made for the glorious gladiolus! Especially the delicate, 4-inch salmon pink flowers of the salmon gladiolus (Gladiolus oppositiflorus spp. salmoneus).

Hailing from the summer rainfall areas of the cold, higher elevations of the Drakensberg Mountains of South Africa, this beautiful wild species has proven amazingly hardy in the Chicago Botanic Garden’s Graham Bulb Garden over the last five years—including a couple of winters with record-setting cold temperatures!

PHOTO: Gladiolus oppositiflorus ssp. salmoneus.

Gladiolus oppositiflorus ssp. salmoneus produces elegant, upright flower stalks that do not require staking!

Two characteristics of its native habitat nominated the gladiolus for trial at the Garden: first, it is a winter-growing bulb in South Africa, which translates to summer growth in North America. Second, this plant thrives in moist soils in grassy areas—it was perfect for the site we chose in the Bulb Garden.

Based upon its initial success in our plant trial program, other gladiolus (also currently in full flower) were added to the trials. We’ve also discovered that these wild species thrive and multiply in well-drained soils (but do not tolerate flooded soils). The beautiful, red-flowered Gladiolus saundersii is also native to the Drakensbergs, but from a higher, colder, and snowier habitat. And a third selection is probably a close relative of Gladiolus dalenii var. primulinus. Discovered in an old, abandoned farmstead in North Carolina, and sold under the name ‘Carolina Primrose’, this gladiolus generally blooms in July and early August (although it is still blooming now). All have come through the record-breaking cold of the last couple of winters. 

Gladiolus is the largest genus in the Iridaceae (iris plant family) with 255 species worldwide; 166 of them in southern Africa. The genus was given its name by Pliny the Elder, in reference to the size and shape of the leaves, which are similar in shape and size to a short sword favored by Roman-era gladiators: the gladius.

It’s not easy to find commercial sources for these bulbs, but it’s well worth the effort to obtain an elegant, refined, fall-flowering, and hardy gladiolus.


©2015 Chicago Botanic Garden and my.chicagobotanic.org

Sure, it snowed just three days into spring—it’s Chicago! This week we’re set to hit the magic temperature, 45 degrees Fahrenheit, and here’s what it will trigger in your garden.

ILLUSTRATION: How trees set buds in spring.


©2015 Chicago Botanic Garden and my.chicagobotanic.org

Autumn Blooms in the Bulb Garden

Tom Weaver —  September 27, 2014 — 2 Comments

It’s now early fall and that means it’s time for Colchicum! Colchicum is a group of flowers also known as autumn crocuses, though they’re not related to the true crocus. Seventeen species and varieties of Colchicum grow in the Graham Bulb Garden. Flower colors range from white to magenta-violet, and include doubles and bicolors.

PHOTO: Colchicum cilicum.

Colchicum cilicum

Colchicum blooms are a great way to brighten up the early autumn landscape. They’re best grown in a groundcover or as an underplanting for taller bulbs such as lilies (Lilium sp.). The spring foliage can be rather large and hosta-like, making them sometimes difficult to pair with smaller spring-blooming bulbs such as Scilla, but it makes them perfect for hiding bare stems of tall plants in the summer while providing a jolt of color to your beds just before everything goes to sleep for the fall.

PHOTO: Colchicum 'Antares'.

Colchicum ‘Antares’

PHOTO: Colchicum x agrippinum.

Colchicum × agrippinum

In addition to the crocuses, dahlias and lilies are still bursting forth with color, like jewels in the September garden. The cooler temperatures help create richer colors in the dahlias, and longer-lasting blooms, while their large size provides a contrast with the dainty blooms more typical of fall bulbs. We’re still seeing the final blooms of Lilium speciosum ‘Uchida’ as well. This lily is notable for being the latest-blooming lily in our climate. These plants started blooming in early September and are still holding on. Due to their late blooming nature, these beauties must be planted in the spring in a well-drained but fertile area. 

PHOTO: Lilium speciosum 'Uchida'.

Lilium speciosum ‘Uchida’

PHOTO: Dahlia 'Bahama Mama'.

Dahlia ‘Bahama Mama’

PHOTO: Dahlia 'Diva' and Salvia guaranitica 'Argentina Skies'.

Dahlia ‘Diva’ and Salvia guaranitica ‘Argentina Skies’

PHOTO: Dahlia 'Jitterbug'.

Dahlia ‘Jitterbug’

While these might be the last blooms of the season in the Bulb Garden, this certainly isn’t the end of interesting things happening in the Chicago Botanic Garden. Fall foliage color will be peaking soon, and winter holds its own interest in the colors of berries, dogwood stems, and the exfoliating bark of the birches against snow’s white blanket.

©2014 Chicago Botanic Garden and my.chicagobotanic.org

We learned about some of the more unusual orchids featured in the Orchid Show (purchase tickets here) when we toured with Boyce Tankersley, director of living plant documentation.

PHOTO: Dendrobium Comet King 'Akatsuki' orchid.

Dendrobium Comet King ‘Akatsuki’

Boyce told us we have 183 taxa of orchids in our plant collections and 53 of those are straight species found in the wild. Of course, none of our orchids are wild-collected because that does damage to the species, so the orchids we acquire are propagated through tissue culture. We display the orchids that do best in our greenhouse growing conditions, and most of those do best in the Tropical Greenhouse.

Some of the orchids Boyce shows us in the video below are Vandas, which are native to the Philippines and other islands in Southeast Asia.

Boyce shared his love of Dendrobiums and revealed a goal to visit an area of the Himalaya Mountains where they cover the oak trees. But watch out: Boyce warns us of leeches in the area! (Don’t worry, we don’t have those in our greenhouses!)

Finally, we examined an interesting ground orchid, Phaius tankervilliae ‘Rabin’s Raven’, which is growing very well in our greenhouse conditions.

Vanda Orchid

Vanda manuvadee

Nun orchid

Phaius tankervilliae ‘Rabin’s Raven’

Click on the video link above or watch on YouTube to get the full tour!


©2014 Chicago Botanic Garden and my.chicagobotanic.org