“Hazards” of the Job: Dealing with Plant Defenses in the National Herb Garden

By Chrissy Moore

Hot shot firefightersI’ve never been much of a daredevil. Overactive amygdala, perhaps, or maybe I’m just a ninny. (Usually, the latter.) And yet, I’ve always admired those individuals who brave dangerous situations for the good of others: firefighters running toward the flames; avalanche search and rescue teams; Alaska’s Coast Guard members that jump into frigid waters during gale force winds…you get the idea.

Today, I had an epiphany while watering our myriad plants in the greenhouses. Most people think that herb gardening is a quaint, bucolic endeavor, which, admittedly, has a ring of truth to it. But, those people have never worked in the National Herb Garden (NHG), where we, too, face dangerous situations on a regular basis, just of the botanical sort.

Staff handling heavy containersFor example, every year, twice a year, the NHG staff and coworkers haul many large containerized plants into and out of the greenhouses, where they spend the winter months. Many of these plants are loathsome creatures, not just because of their size (try hauling and lifting hundreds of pounds of “dead weight” for hours at a time…hope you didn’t water them the day before!), but because of the physical hazards they present. It is not unusual for plants to employ natural defenses to protect themselves from malevolent insects or browsing animals, etc. That’s understandable. Yet, when we—the benevolent humans assigned to be their nurturing handlers—are subjected to that very same botanical weaponry, it seems just a wee bit like unnecessary punishment. But, no one ever said life was fair.

Flowers and fruit of CalamondinLet’s look at our beloved Citrus plants. These shrubs have beautiful flowers with a glorious scent and delectable fruit. What’s not to love? Most people only get the occasional painful squirt of acidic juice in their eye when peeling the fruit.Thorns on Citrus plant Yeah, not us. We are repeatedly stabbed by the plants’ two- to three-inch long thorns all over our bodies and, heaven forbid, in or around our eyes. To paint the picture for you better, our method for moving all of the plants in and out of the greenhouses is by a hand truck. So, the whole upper half of our bodies is engulfed by the plant’s canopy. For the Citrus, one puncture wound is bad enough; multiple punctures is just plain mean.

A few years ago, I was visiting friends in Málaga, Spain. It was interesting to see large, in-ground specimens of plants that we can only grow in containers in the NHG. One of them, Phoenix dactylifera (date palm), is one of our more hated plants to move in the garden. (If only we could grow ours in the ground!) Like many palms, the fronds have sharp points at the end of every leaflet.

And like the Citrus plants, our date palm gets hauled around on the hand truck, with all the fronds right at face level. Death by a thousand stabs. To get the plants into their final positions, we need to navigate the narrow greenhouse walkways, which takes a lot of coordinated effort between the one hauling the plant and the person doing the guiding; more often than not, the person doing the hauling can’t see past the plant and must navigate by auditory cues rather than visual ones. As you might imagine, this only adds to the danger!

Staff with Phoenix dactylifera leaves in their face

Moving the date palm

My personal “favorites” each have minor variations on the armament theme just to keep you from getting complacent: pineapple (Ananas sp.) has upward-facing prickles along its leaves; Agave sp. has outward-facing prickles; and cascalote (Tara cacalaco) has downward-facing prickles. These are what I consider the plant versions of the Chinese finger torture: the more you dive in or pull back, the more caught you become. And, by default, the more stabbing you experience. Agave plants, in particular, are awkward to maneuver on a good day, but ours range in size from three to four feet across and two to three feet tall. Given their sprawling nature, there’s not even the remote chance of using a hand truck to move them.

You must fully embrace the pain by lifting them from the ground just under their “waists,” like a child that’s really just too big to be picked up anymore. “Bend with your knees!” has little bearing on this activity. If we’re being honest, we’re just trying to fling that thing to its final resting place as fast as we can and from whatever “reasonable” posture we can attain, wrecked clothing and hairdo be damned. How do those folks at the Desert Botanical Garden in Arizona do this day in and day out? No thanks…trying to quit. My assistant, Erin, is the smart one; before handling an agave, she nips the spines off with her pruners. Duh! Why didn’t I think of that?

Cascalote, while sporting dainty, pinnately compound leaves, is actually a botanical death trap. Like the agave, pineapple, and Citrus combined, its prickles are not only curved for maximum entrapment, but they also cover the entirety of the plant, nearly from head to toe. The only thing in its favor (at least for our specimen) is that it has a generally upright growth habit rather than being wild and ungainly like the pineapple and agave. Thank goodness for small blessings, short-lived though they may be. Getting caught in the cascalote is like getting sucked into quicksand—the more you move, the worse your situation becomes. I did say Chinese finger torture, didn’t I? (Side note from Erin on moving our cascalote: “Man, after moving that Tara this go around, I got home that night and had a thorn still stuck in my leg. It had worked its way through jeans and a thermal layer to hitchhike and irritate me all day. I still have a little scar!” See! We’re really telling the truth.)

The last, but certainly not least, plant on my list is sugarcane (Saccharum officinarum)—and, frankly, most species in the grass family (Poaceae). If you’ve never worked with a grass of sugarcane’s magnitude, then you haven’t met the devil incarnate…yet. It hides its weaponry really well, so you’re more likely to forget rather than be vigilant. Sugarcane is replete, not only with irritating hairs Trichomes (hairs) on Saccharum (sugarcane) leaves(called trichomes) at the joints along the stem that wiggle under your clothing and irritate your skin to no end, but the leaves themselves sport razor sharp edges in a pattern similar to a sawmill blade. The leaf edges slice human skin with the accuracy of a piece of notebook paper. Yep, paper cuts are my fa-a-a-vorite! “What? You don’t enjoy paper cuts? Hmmh, go figure!” Handling sugarcane takes a bit of forethought and a deft hand. The trick is to pick up the plant so that the leaves are directed away from your own body and hopefully not toward your coworkers who are naïvely standing nearby. Invariably, though, someone will get a little too spirited in their moving, and suddenly, we’re all running for cover like kids at a piñata party.

Scanning electron micrograph of a sugarcane leaf edgeWhile not all of our plants create perilous situations (parsley and oregano are pretty benign…or are they?), we certainly hear a lot of grousing and grumbling from our coworkers and volunteers when moving day arrives…sometimes under muffled breath and sometimes hollering from the top of their lungs. That’s when you shrug your shoulders and say, “Just another day in the life of the National Herb Garden! Someone get the First Aid Kit.”

Author’s Note: I regret to inform our readers that the Phoenix dactylifera has moved on to greener pastures (pun intended). We finally decided that it was getting too big for safe handling and preferred to start anew with a smaller specimen. Our bodies are grateful for that decision.


Chrissy Moore is the curator of the National Herb Garden at the U.S. National Arboretum in Washington, D.C. She is a member of the Potomac Unit of The Herb Society of America and is an International Society of Arboriculture certified arborist.

Hawaiian Herbal Medicine: Rooted in Family and Tradition

By Kaila Blevins

Hawaiian Healer Po‘okela Papa Henry AuwaeMy grandmother grew up in Hawai’i, so my childhood was filled with trying traditional dishes like poi, and my vocabulary is peppered with Hawaiian words. But, I did not know much about traditional Hawaiian herbalism and began researching.

La’au lapa’au is one of several traditional healing methods practiced by Native Hawaiians, and it is rooted in the use of plants. A traditional healer’s job goes beyond just prescribing plants. They use a holistic approach to ensure that the body, mind, and spirit are in harmony to promote good health. The lack of harmony between the three elements results in illness. Beyond assessing the harmony between the body, mind, and spirit, healers follow traditional practices to ensure harmony with the environment as well.

Traditionally, the plants were harvested in the lush forests or were planted near heiaus, or sacred temples, if a healer resided there. Today, foraging at the temples is forbidden due to the sacredness and cultural significance of them. heiausHowever, healers from then and now continue to follow the same principles when approaching plants. They revere the plants for the gifts that they offer through their medicinal properties and act as stewards by tending to their needs and promoting sustainable foraging practices. This process acknowledges the innate intelligence of plants. As the healer approaches the required plant needed for healing, they think of the person who enlisted their help before kneeling and praying, sharing their gratitude for the plant, and asking permission to harvest. If permission is granted, the harvest begins. Once the necessary amount is gathered, the healer never turns their back to the plant–a societal norm that is also practiced when near elders–backing away, giving thanks for the gift. In some cases, the healer may not be the one to gather the medicine. Instead, this may be prescribed as part of the healing journey, and the client will forage and perform the ceremony of giving thanks to the required plants. 

Furthermore, since the plants are Earth’s gifts for humans to use, traditional healers will not charge for their services. The lack of payment ensures a lifelong commitment to the practice and prevents greed from tainting the practice. 

Between each island, the plant palette changes, so the island on which the healer resides dictates the plants used in their practice. However, some plants are indigenous to the majority of the islands, or they’ve been naturalized. Below is a brief list of plants and some of their herbal uses:

Aleurites moluccanus (kukui, candlenut)

Declared the state tree in 1959, kukui leaves are crushed into poultices, and the roasted nuts are pounded into salves to treat sores and external ulcers. Historically, mothers chewed the flowers and gave them to their children to heal sores. After recovering from an illness, the nut meat is often combined with fish and ‘uala (sweet potato) for a nutrient-rich meal. Culturally, the nuts were used in candles, and the ash collected from burned nuts was used for tattoos and canoe paint. 

Morinda citrifolia flowers and fruitMorinda citrifolia (noni, Indian mulberry)

Introduced in 1941 from Fiji, noni has naturalized across the islands and is also cultivated due to its numerous herbal benefits. The leaves are used to treat a variety of skin problems, including cuts, boils, growths, and even lice. Traditional healers use all parts of the tree as a laxative.  

Saccharum officinarum (kō, sugarcane)

Saccharum officinarum sugar caneChewing on the sugary stalk can strengthen the teeth and gums, while the juice is used to sweeten other medicines, or is combined with Ipomoea alba (tropical white morning glory) and salt to treat deep cuts and wounds. In folklore, the juice of kō is used to create a love potion. However, the correct species must be utilized since others are used to block love potions.

After I completed the draft of this blog post, I called my grandmother and discussed the topic with her. While she was not familiar with the uses of the plants, it did remind her of the landscape of her youth. Furthermore, I enjoyed learning about the Native experience and interactions they had with the environment, since their practices are rooted in respect for their environment and plants.

Photo credits: 1) Hawaiian Healer Po‘okela Papa Henry Auwae (Jeanella and Kehaulani Keopuhiwa, National Library of Medicine); 2) Heiaus (National Park Service); 3) Aleurites molucanna flowers and fruit (Hawaiian Plants and Tropical Flowers); 4) Morinda citrifolia (Plants of Kaloko-Honokohau National Historical Park); 5) Saccharum officinarum (National Tropical Botanical Garden).

Medicinal Disclaimer: It is the policy of The Herb Society of America, Inc. not to advise or recommend herbs for medicinal or health use. This information is intended for educational purposes only and should not be considered as a recommendation or an endorsement of any particular medical or health treatment. Please consult a health care provider before pursuing any herbal treatments.

References

Aleurites moluccanus (kukui). (n.d.). Accessed 7/2020. https://www.kapiolani.hawaii.edu/aleurites-moluccana

Kalama, H. (n.d.).: Healing With Spirituality And Herbs. Accessed 7/2021.  http://heyokamedicine.com/laau-lapaau

Lincoln, N. K. (2017). Description of Hawaiian Sugarcane Varieties. Accessed 7/2021. http://cms.ctahr.hawaii.edu/cane

National Park Service. Wailua Complex of Heiaus. Accessed 8/13/2021. https://www.nps.gov/places/wailua-complex-of-heiaus.htm

Timboy, M. (n.d.). La‘au Lapa‘au: Medicinal Plants and Their Healing Properties. Accessed 7/2021. https://keolamagazine.com/agriculture/medicinal-plants/

U.S. National Library of Medicine. (n.d.). Medicine Ways: Traditional Healers and Healing. Accessed 7/2021. https://www.nlm.nih.gov/nativevoices/exhibition/healing-ways/medicine-ways/healing-plants.html


57348119_2256114837761256_4232634512942563328_nKaila Blevins is the 2020-2021 National Herb Garden intern. She graduated from the University of Maryland, College Park, with a B.S. in Environmental Science and Technology and a minor in sustainability. She is pursuing a Master’s in Landscape Architecture at Morgan State University while also interning in the National Herb Garden. In her spare time, she likes to read, paint, brew kombucha, and experiment with its flavors, as well as spend time with her family and pets.