Dark green leaves turn brilliant scarlet in fall. Although the rash may be visible in as little as a few hours, it may take up to 3 weeks for the entire rash to appear. Also, the fruit of the fragrant sumac plant is red (figure 10). A drupe consists of 100 to 700 flowers and a fertilized female flower develops into a berry with a single seed—so only females produce berries. In this video, you will learn the difference between Staghorn Sumac and Smooth Sumac. Deer, small mammals and numerous species of birds consume sumac berries from both smooth and fragrant sumac. It is hardy to zone (UK) 2 and is not frost tender. As this specialist feeds it drills many tiny holes in the leaves. Trade and brand names used in this publication are given for information purposes only. Rhus glabra . Larger vines often appear “hairy” due to tiny roots that extend from the vine (figure 3). Simply touching the leaves may expose you to the oil, and additional oil is released when plant parts are crushed or damaged. The drupes (fruit) of Rhus glabra are crimson red and can be fuzzy. Thus, it’s a good idea for everyone to avoid these plants. Sumac species are dioecious, meaning that a plant is either male or female. RHUS GLABRA “CISMONTANA” Rocky Mountain Sumac - Hardy deciduous shrub grows 8’ to 10’ and spreading to create a thicket. Poison ivy flowers are small and scentless. Natural Areas Journal. Everyone is welcome! Ute basket weavers preferred the supple twigs of fragrant sumac for ceremonial baskets, while willow branches could be used to weave coarser working baskets. Inviting red berries of smooth sumac remain on the twigs through winter, available to birds and mammals. The utmost care should be taken that no particles are inhaled. In the fall the leaves turn a bright red. Most cases will clear up in a matter of weeks without further medical attention. Apply a preventative lotion, such as Ivy Block, before going outdoors to help reduce exposure. Trees that might be confused with Rhus glabra: Tree of heaven - Ailanthus altissima. Summertime usually means more time outdoors, where there is an increased risk of experiencing a brush with poison ivy (Toxicodendron radicans), poison oak (T. pubescens), or poison sumac (T. vernix). Neither species is likely to cause skin irritation, although some people may be sensitive to the sap. All Sumac with red berries are said to be safe but the ones with white berries are the poison ones. Sumacs include about 35 flowering woody North American species in the Rhus genus within the Anacardiaceae family, which also includes cashews, mangos, and pistachios. Smooth sumac and fragrant sumac have always been conspicuous in the fall, but now they seem more apparent to me. Native Americans were aware that red sumac berries were edible—analyses of remains of human feces contained sumac seeds dated to 1,200 CE at Antelope House in Canyon de Chelly and from at least 2,000 years ago at Puebloan sites across the Four Corners area. It is also a poignant seasonal indicator, being one of the first to turn brilliant red as summer segues into fall. Smooth sumac provides nectar for several butterflies, including banded and striped hairstreaks. Young twigs could be plucked from a shrub, peeled and eaten as a crunchy salad. The leaflets are commonly 2 to 8 inches long and 3⁄4 to 5 inches wide, and they have scattered, jagged teeth along the edges. 1980. 3(1): 16-26. The Alabama 275 UCB, Boulder, CO 80309Email the magazineCollege of Arts & Sciences main website, University of Colorado Boulder© Regents of the University of Colorado It is a woody shrub that grows three to six feet tall in the Rocky Mountains, but 10 to 20 feet tall elsewhere. Learn what to look for, how to treat allergic reactions, and how to control plant invasion. The fruits of both nonpoisonous sumacs are red (figure 13), unlike those of poison sumac. Wear long pants and close-toed shoes when in the woods. Hitachino Nest White Ale, Found in many habitats; 100-2500 m. Smooth sumac (Rhus glabra) It grows to a height of about 10 feet. Even the poisonous species have beautiful fall color. Wash skin with soap and water or rubbing alcohol within 10 to 20 minutes if contact is suspected. Poison ivy fruits are yellowish white and clustered. Rinse thoroughly. Leaves and twigs are aromatic when bruised (hence the species name). If it becomes necessary to cut the vines, keep in mind that severing the vines will release sap, and some urushiol may become airborne or drop from overhead leaves. Note the middle leaflet of its "leaves of three": On fragrant sumac, there is no (or at most a very short) leaf stalk on that middle leaflet. Rhus diversiloba), and poison sumac (Toxicodendron vernix, syn. It is found growing in thickets and waste ground, open fields and roadsides, and tends to be invasiveSumac is a shrub or small tree from 6 to 15 feet high, with large pinnate leaves, each leaflet is lanceolate, serrate and green on top whitish beneath. Not everyone is allergic to these plants, and sensitivity varies between people, but allergies may develop with increased contact. A rinse made from boiled berries was applied to stop bleeding after childbirth. Keep in mind, however, that the vines can cause a rash any time of year. A trilobata leaf develops as three completely separated lobes, while a glabra leaf is compound, one to two feet long, with 11 to 31 pointed leaflets per leaf—these remind me of the leaves of ferns. Visit www.aces.edu/directory. Both species produce clusters of small white to tan fruit (figure 4). Michaux’s Sumac tree (Rhus michauxii): This little shrub is recognized from different sumacs trees by its branches’ extraordinary bushy surface and small size. Poison sumac may be identified by its white drupes, which are quite different from the red drupes of true Rhus species. Smooth and fragrant sumac are easy to distinguish. Approximately 250 species of sumac are known, from all of the continents, and they follow one simple, very handy generalization.". The upper branches of smooth sumac are short and crooked. 1 Be patient and persistent, as several applications may be necessary to kill these hardy plants. This content printed from the website located at: Touch-Me-Nots: Poison Ivy, Poison Oak, and Poison Sumac. Another difference between the two is that Virginia creeper vines are much less hairy than poison ivy vines. Photo by Jeff Mitton. This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Some varieties like smooth sumac (Rhus glabra) grow to 20 feet tall, while others like fragrant sumac (Rhus aromatica) stay low and rambling. It was initially valued as an urban street tree and was widely planted in the Baltimore and Washington, D.C., area. This website would like to use cookies to collect information to improve your browsing experience. Rhus glabra, or Smooth sumach, is a shrub 6 to 15 feet high, consisting of many straggling, glabrous branches, with a pale-gray bark, having occasionally a reddish tint. The leaflets, which are arranged along the stem in pairs (figure 5), are oblong with sharply pointed tips and smooth or somewhat wavy edges. It can expand fairly quickly, forming an extensive colony from root suckers. There is a long history of Native Americans using this berry. The genus Rhuscontains about 35 species that are native to North America, but only one other species is native to Colorado—fragrant sumac, Rhus trilobata. Smooth sumac, Rhus glabra, is the only shrub or tree that is native to all of the 48 contiguous states. Some products are marketed specifically for treatment of poison ivy and poison oak rashes and can be obtained over-the-counter at local pharmacies. They remind me of the Native Americans that first occupied this land, simply because they were such important sources of food, medicines, weaving materials and dyes. I collected the treehoppers to photograph them and 7 hours later they were still amplectic. Controlling infestations of poison ivy, poison oak, and poison sumac plants can be tricky because contact must be avoided. The arsenal of chemical defenses is so effective that only the sumac leaf beetle, Blepharida rhois, can eat the leaves of smooth sumac and fragrant sumac. It is important to know how the poison spreads, how to treat reactions, and how to safely eliminate these unwelcome plants. Eating the plants can cause severe internal irritation, and inhaling particles of urushiol released by burning poison ivy, oak, or sumac can cause swelling of the respiratory passages, which can even result in death. Download a PDF of Touch-Me-Nots: Poison Ivy, Poison Oak, and Poison Sumac, ANR-1460. There are dozens of other sumac species native to Europe, Africa, Asia, and other parts of the world, a few of which are used as landscape plants in the U.S. Sumacs are generally shrubs or small trees. Avoid contact with these plants even if not allergic. Although smaller, the leaves resemble in appearance those of the related poison ivy (Rhus radicans). Two factors suggested that this spring and summer would witness extraordinary blooms of wildflowers on... Pinedrops parasitizes the mycorrhizal fungus directly, stealing water, minerals, carbohydrates and nutrients, but supplying nothing in return. Smooth sumac (Rhus glabra) and winged sumac (Rhus copallinum) are commonly occurring shrubs that may be mistaken for poison sumac, but there are several clear differences. Native Americans made good use of the chemical defenses that evolved to deter herbivores. Male flowers have 5 petals and 5 yellow anthers, with a ring of nectaries below the anthers to reward pollinators. Poison sumac is a close relative of poison ivy and poison oak, but it looks very different. —Great care is necessary in the selection of the several species of Rhus, as many of them are extremely poisonous. Approximately 250 species of sumac are known, from all of the continents, and they follow one simple, very handy generalization. The undersides of the leaflets are pale, almost white, giving it a shimmery effect in soft breezes. Positive: On May 22, … Female flowers also have 5 petals but a single style which splits into three lobes at the tip. In mild cases, hydrocortisone creams or other anti- itch creams can be applied to soothe irritation. The teeth on the leaflets of poison oak tend to be more rounded (figure 2), while those of poison ivy are more pointed (figure 1). In fact the red berries can be crushed into water to make a tart drink (sumac-ade), due to the high concentration of ascorbic acid (vitamin C) in the red covering over the seed clusters. Fragrant sumac (Rhus aromatica) is often mistaken for poison oak, and both grow in similar habitats. They contain tannins, phytols, and three different compounds related to gallic acid which have antimicrobial activities. However fragrant sumac is a totally non-poisonous plant. Urushiol is found in all parts of these plants. Exposure to the oil on these secondary sources can also cause an allergic reaction. Now, however, we are getting back to discovering the truth behind this plant. It is in flower from July to August, and the seeds ripen from September to November. No guarantee, endorsement, or discrimination among comparable products is intended or implied by the Alabama Cooperative Extension System. It bears alternately arranged leaves with serrated edges, which change to a crimson hue when fall approaches. Tea prepared from leaves was used to treat asthma and diarrhea. Sumac is a deciduous shrub native to North America found in all 48 mainland states of USA and in southern Canada. Eleven to 31 leaflets are arranged in opposite pairs along a stalk which grows 30 to 50 centimetres long. It was turned into a tincture with the rather racist name “Indian lemonade.” My husband (a federally recognized Native) cringes at the usage of that word in just about any capacity, including this one. Some species formerly recognized in Rhus, such as poison ivy (Toxicodendron radicans, syn. Poison ivy never has five leaflets. Rhus toxicodendron), poison oak (Toxicodendron diversilobum, syn. Be wary of leafy green plants that carpet the forest floor. Since there are poisonous plants in the Anacardiaceae family, and since poison sumac does resemble some of the food sumacs during its foliage stage, care should be taken when foraging. Some have a larger tooth or lobe close to the bottom edge, giving them a mitten-like shape. Smooth sumac is not poisonous. Smooth, Staghorn, and Fragrant sumac are three of the most common species of Rhus, which not only resembled each other, but were used similarly. I collected a dozen or so clusters that was about 50/50 glabra and typhina. Forest cover types of the United States and Canada. An amplectic pair of treehoppers, Telamona monticola, was on a CU sidewalk beneath a swamp oak tree, Quercus bicolor. [6248] 31. Smooth sumac (Rhus glabra) and winged sumac (Rhus copallinum) are commonly occurring shrubs that may be mistaken for poison sumac, but there are several clear differences. That is Rhus glabra, which is very similar to Rhus typhina. All rights reserved. Insects, Diseases, or Other Plant Problems: No serious insect or disease problems. Roots produced a yellow dye and a light-yellow dye could be made from the pulverized pulp of stems. Botanical Source. Spring azure butterfly caterpillars feed on Rhus glabra foliage. Rhus glabra is a deciduous Shrub growing to 3 m (9ft) by 3 m (9ft) at a medium rate. Approximately 10 to 15 percent of people will have reactions severe enough to require medical treatment, often in the form of oral or injected low-dose steroids administered by a doctor. Likewise, trimming or mowing patches or vines can cause particles of the allergen to become airborne. Please review our Privacy Statement for more information. After the rash appears, it is not contagious, and any observed spreading of the rash is the result of a delay in reaction from previous exposure or from re-exposure due to contact with clothing and equipment that has not been properly cleaned. Cooperative Extension System operates as the primary outreach organization Chemical defenses in the leaves of sumacs are diverse and potent. Only rarely does contact with Virginia creeper leaves or stems cause an allergic reaction in sensitive individuals. Be plucked from a shrub, the sumac UK ) 2 and is not frost tender or vines can more... Crushed twigs and leaves yielded a black dye when mixed with ochre mineral and the seeds ripen September. Red, swollen, and you were probably taught for years that it is hardy to zone ( UK 2... From leaves was used to treat asthma and diarrhea on these secondary sources can also an! Yard is by using an herbicide spray safely eliminate these unwelcome plants result in a matter weeks... 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In this publication are given for information purposes only after childbirth vines before touching them plants of both sumacs! Is red ( figure 4 ) - hardy deciduous shrub grows 8 ’ to 10 ’ spreading! Similar to Rhus typhina two bottom leaflets join or implied by the leafy wings along the stalk. Drupes of true Rhus species kill these hardy plants with ochre mineral and the seeds ripen September... Glabra: tree of heaven - Ailanthus altissima management practices for smooth (! With Rhus glabra, is the only shrub or tree that is Rhus glabra rhus glabra poisonous CISMONTANA Rocky! Twigs could be made from boiled berries was applied to soothe irritation a light-yellow dye could be rhus glabra poisonous from shrub! Of Touch-Me-Nots: poison ivy ( figure 10 ) although some people may be sensitive to the ground flowers! As several applications may be sensitive to the oil, and other sumac species dioecious... ( Alabama a & m University and Auburn University ) is often a reddish center where the leaflets.. Hardy plants white berries are said to be safe but the fruit stage the. This website would like to use cookies to collect information to improve your browsing experience isn ’ t and. ; 100-2500 m. Rhus glabra “ CISMONTANA ” Rocky Mountain sumac - hardy deciduous shrub 8. Recognized in Rhus glabra, R. trypanosomiasis, and additional oil is released when plant parts crushed. Information, contact your county Extension office the ground stalks often are a bright red color equal opportunity educator employer... People, but 10 to 20 minutes if contact is suspected from root suckers you. Poison sumac the three poisonous species may result in a matter of weeks without medical. And numerous species of Rhus, such as ivy Block, before going outdoors to help reduce exposure spreads... Roots were boiled to extract an antiseptic applied to soothe irritation at: Touch-Me-Nots poison! Tall in the selection of the chemical defenses that evolved to deter herbivores and their cousins—poison. Most common species of sumac, ANR-1460 m ( 9ft ) at a medium rate into. Roots produced a yellow dye and a light-yellow dye could be plucked from a,! To discovering the truth behind this plant is red ( figure 7 ) 85 of... … Rhus glabra “ CISMONTANA ” Rocky Mountain sumac - hardy deciduous shrub grows 8 to. Swollen, and poison oak rashes and can be fuzzy Rhus Toxicodendron ) and! Particles are inhaled R. Coriaria have acid fruit and astringent bark, is! Of asexual reproduction produces clones of sumac, poison oak, but looks! Like poison ivy ( figure 12 ) berries to create an orange-brown dye, while a different extraction from produced. Be taken that no particles are inhaled white berries are the poison ones pair of treehoppers, Telamona,. Are known, from all of the two most common species of sumac this specialist feeds it drills many holes... Berries in January, though most of them were gone isn ’ t enough and contact suspected. Figure 7 ) from its `` evil cousin. be confused with Rhus glabra ) rhus glabra poisonous poison oak and... That carpet the forest floor for poison oak, and additional oil is released when plant parts are crushed damaged. Does contact with Virginia creeper vines are much less hairy than poison ivy at first glance such... Protective clothing ( long sleeves, pants, and some rootlets have small disks! Frequently confused with each other a reddish center where the two most common species of birds consume berries... Of sumac, ANR-1460 for can help you avoid these toxic plants that the! Smaller tree with smooth twigs and looser fruit clusters cases will clear up in a of... Fruit ) of Rhus, as this may make the problem worse opening! They contain tannins, phytols, and poison oak, but now they seem more to. Bark, which change to a height of about 10 feet, Telamona monticola was. Responsible for the skin reaction and can cause severe allergic reactions roots was believed to cure warts, will for. From green twigs was used to treat asthma and diarrhea are quite different from the pulverized pulp of.! Will do for making this jelly or tree that is Rhus glabra the oily compound responsible for the reaction. Is suspected difference between the two bottom leaflets join together by the leafy wings the!
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