Category: Trees and Shrubs

Creek Dogwood (Cornus sericea)

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Cornus sericea, commonly known as Redosier Dogwood, Red Twig Dogwood, or American Dogwood, is a deciduous shrub native to North America. It belongs to the family Cornaceae and is known for its striking red stems, especially visible in the winter, which provide ornamental value. This report explores the botanical characteristics, habitat, ecological significance, and uses of Cornus sericea.

Creek Dogwood (Cornus sericea)
Creek Dogwood (Cornus sericea)

Botanical Characteristics

Morphology

  • Stems and Bark – The most distinctive feature of Cornus sericea is its bright red stems, which are particularly vibrant in young twigs. The bark is smooth and can be greenish-red in younger branches, turning grayish-brown with age.
  • Leaves – The leaves are opposite, simple, and ovate to lanceolate, with a length of 5-12 cm. They have a smooth margin and are characterized by prominent venation. In the fall, the leaves turn a variety of colors including red, purple, and orange.
  • Flowers – The flowers are small, creamy-white, and arranged in flat-topped clusters called cymes. Each flower has four petals and blooms from late spring to early summer.
  • Fruit – The fruit is a small, white to bluish-white drupe, typically maturing in late summer. These drupes are an important food source for various bird species.

Growth and Reproduction

Cornus sericea can grow up to 1.5-4 meters in height and spreads through both seeds and vegetative means. It readily forms thickets by sending up new shoots from its root system. The plant prefers moist, well-drained soils but can tolerate a range of soil types including wet, clay soils.

Habitat and Distribution

Geographic Range

Cornus sericea is widespread across North America, from Alaska and Newfoundland south to New Mexico and Virginia. It thrives in a variety of habitats including wetlands, stream banks, and forest edges.

Environmental Preferences

This shrub prefers full sun to partial shade and thrives in moist, well-drained soils. It is often found in riparian zones, wetlands, and along the edges of lakes and rivers. Cornus sericea is adaptable to different soil types, including clay and sandy soils, and can tolerate seasonal flooding.

Ecological Significance

Wildlife Habitat

  • Birds – The berries of Cornus sericea are a crucial food source for many bird species, including American robins, cedar waxwings, and woodpeckers. The dense thickets provide excellent cover and nesting sites for birds.
  • Mammals – Small mammals, such as rabbits and beavers, feed on the bark and stems. The plant’s dense growth offers shelter for various small animals.

    Erosion Control

    Due to its extensive root system, Cornus sericea is effective in stabilizing soil and preventing erosion, especially along riverbanks and slopes. It is often used in riparian restoration projects for this reason.

    Uses

    Ornamental Use

    Cornus sericea is widely planted as an ornamental shrub for its vibrant red stems, which provide winter interest in gardens and landscapes. It is also used in hedges, windbreaks, and as a natural screen.

    Traditional and Medicinal Uses

    Indigenous peoples of North America have historically used Cornus sericea for various purposes. The bark and stems were used in basket weaving, and the plant had medicinal applications, such as treating colds, fevers, and diarrhea.

    Conservation and Restoration

    Due to its ability to thrive in wet environments and stabilize soil, Cornus sericea is utilized in wetland restoration and conservation projects. It helps in maintaining biodiversity and improving water quality by filtering runoff.

    Conclusion

    Cornus sericea is a versatile and ecologically significant plant with wide-ranging benefits for wildlife, soil stabilization, and ornamental use. Its adaptability to different environments and its role in supporting biodiversity make it an important species in North American flora. Conservation and utilization of this shrub can contribute to sustainable environmental management and restoration efforts.

    This report provides a comprehensive overview of Cornus sericea, highlighting its importance in various ecological and practical contexts. Further research and conservation efforts can enhance our understanding and utilization of this valuable plant species.

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    Coyote Melon (Cucurbita palmata)

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    Coyote Melon (Cucurbita palmata)
    Coyote Melon (Cucurbita palmata)

    Coyote Melon (Cucurbita palmata), also known as Coyote Gourd, is a flowering plant common in the desert southwest and known to produce spherical yellow – green melons. The vine like plant is commonly found is loose, sandy or gravely, dry, well drained soil which is common in Southern California, Arizona, Nevada and exclusively in Washington County, Utah. The primary characteristic is the growth of a green melon or gourd which is quite startling when you first see them in the hot desert climates.

    Sereno Watson (December 1, 1826 in East Windsor Hill, Connecticut - March 9, 1892 in Cambridge, Massachusetts) was an American botanist
    Sereno Watson (December 1, 1826 in East Windsor Hill, Connecticut – March 9, 1892 in Cambridge, Massachusetts) was an American botanist

    The gourd was first described in 1876 by Sereno Waston who was a Yale graduate with a degree in Biology, The Coyote Melon features a sprawling stiff vine with rough, stiff-haired stems and leaves. Cucurbita palmata produces a large yellow bell shaped flower, while the melon itself is smooth in appearance. The striped yellow – green colored gourd is known to be quite hard, however, also thin when mature. The melons are very bitter and not edible. This hearty planet can survive the harsh desert landscape through its use of a large and hearty tap root. This root system can extend several feet into the dry soil to supply the plant with nutrients and water required for survival.

    The Coyote Melon (Cucurbita palmata) is extremely fibrous and although not edible to humans is known to be on the coyotes diet during the fall, hence its name. It is quite common to find the seeds of this plant in coytoe scat during the fall months.

    Despite the fibrous melon being inedible by man, the native american tribes were known to consume the ground seeds of this plant. Additionally, they used the dried gourds as rattles in various dances and other ceremonies. They also utilized the plant was as soap for cleaning.

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    Desert Mistletoe ( Phoradendron californicum )

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    Desert Mistletoe ( Phoradendron californicum ) or mesquite mistletoe, is a leafless parasitic plant which attaches itself to a host plant. The host plant is typically Ironwood, Mesquite, Palo Verde, or Acacia. The hemi parasitic plant, when attached, will remove water and nutrients from the host, however it still performs its own photosynthesis in the green stems.

    Desert Mistletoe ( Phoradendron californicum )
    Desert Mistletoe ( Phoradendron californicum )

    The female Desert Mistletoe will produce small flowers in the winter months. It turn it will produce small clear or red colored berries which are consume by birds and therein the seeds are spread. A plant can grow up to to three feet in size and should several attached to a individual, they are capable of killing the tree.

    The seeds can be utilized as a food source for humans as well and utilized by some Native American tribes. Typically, the seeds are only consued from plants growing on Ironwood, Acacia or Mesquite. The stems and remaining plant body should not be consumed as they are poisonous and a hallucinogenic. Each year, people die from consuming mistletoe seeking a “high”. For those of us, not of Native American ancestry it is not uncommon to harvest and sell this species of mistletoe around the holiday season.

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    Southern Cattail (Typha domingensis)

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    Commonly found in the southern half of the United Stats, the Southern Cattail ( Typha domingensis ) is a a wetland plant which may be found in California, Nevada and Arizona. The Southern Cattail will flower in late spring and summer and produces a densely packed seed spike which may grow up to 13 inches long. The Pistillate spike is the identifying feature on this wetland plant.

    Southern Cattail (Typha domingensis)
    Southern Cattail (Typha domingensis)

    This rhizomatous plant is centered around a simple, erect stem which may grow between 5 and 13 feet tall. Each stem may grow between 6 and 9 long and linear leaves. As with many marsh plants, the cattail has an internal tissue adaptation which allows the direct transfer of air between the leaves and roots, which is similar to a vegetative snorkel. The hot dog shaped brown flower is indicative of a female plant, while the male is characterized by a yellowish tapered cone arrangement.

    The cattail is typically found between sea level and 6000 feet in elevation. Native American tries were known to use the plant as thatch, and the young shoots could be utilized as a food source. The seed fluff could also be mixed with tallow and chewed as a gum.

    Southern Cattail along a water crossing on the old Mojave road.
    Southern Cattail along a water crossing on the old Mojave road.

    Recent studies suggest that the Typha is very effective at cleaning the water of bacterial contamination. This includes up to 90% reduction of enterobacteria which is common flora inside of mammalia intestines.

    Mojave Yucca (Yucca schidigera)

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    The Mojave Yucca is a small evergreen tree which flourishes in the Mojave and Sonoran deserts of California, Arizona and Nevada. The Yucca’s most noticeable characteristic is its large branches and bayonet like leaves. The rigid leaves are typically dark green in color and can reach up to 4 feet in length. I can also personally attest that they are sharp at the pointy end.

    Mojave Yucca guarding the Ring Trail, Mojave National Preserve.
    Mojave Yucca guarding the Ring Trail, Mojave National Preserve.

    The Mojave Yucca can reach a height of 16 feet and that mass is supported by a trunk which is up to 12 inches in diameter. The Yucca is typically found on rocky slopes and below 4,000 feet in elevation. The plant blooms are very similar the Joshua Tree and it will send up a cluster of white bell shaped flowers from the top of the stem. This cluster is short lived, but can reach and additional 120 cm in length.

    Also like the Joshua Tree, the Mojave Yucca depends upon the white pronuba moth for pollination. This moth will deposit its eggs in the ovary of the Yucca Flower and there by cross pollinate the tree. The moth lavae hatch and consume some the the seeds in a wonderful example of natures balance.

    The Mojave Yucca also provided utilitarian purpose for the Native Americans. They utilized the leaves as a source of cordage, which could be woven into blankets, rope, hats and mattresses. The roots of the Yucca contains high levels of saponin, and could be made into a pulp and used as soap The flowers and fruit were a food source and could be eaten both raw and roaster. The black seeds could be ground into flour.

    The yucca, with its sharp pointed leaves offer wonderful defensive habitat for snakes, lizards, rabbits, birds and other desert animals.