Solidago albopilosa

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Solidago albopilosa
Solidago albopilosa.jpg
Conservation status

Imperiled (NatureServe)
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Genus: Solidago
Species: S. albopilosa
Binomial name
Solidago albopilosa
E.L.Braun

Solidago albopilosa is a rare species of flowering plant in the aster family known by the common name white-haired goldenrod. It is endemic to the state of Kentucky in the United States. It is threatened by recreational activities in its habitat. It is a federally listed threatened species of the United States.

This plant is a perennial herb producing one or more erect stems from a woody caudex.[1] It grows 30 to 50 centimeters tall but it can reach 1 meter in height. It is covered in white hairs.[2] The leaves have oval or spatula-shaped serrated blades up to 8 or 9 centimeters long by 4 or 5 wide, becoming smaller toward the end of the stem. The leaf blades are "so thin that coarse print is readable through [them]."[3] The inflorescence is a cluster of up to 30 flower heads, each roughly half a centimeter long. The head contains 3 to 5 tiny yellow ray florets and a few disc florets. The fruit is up to half a centimeter long including its pappus.[1] Blooming occurs in September through November.[2]

This plant is found in a single river canyon in Kentucky. It grows in the Red River Gorge in Daniel Boone National Forest in Menifee, Powell, and Wolfe Counties.[4] There it is limited to rock shelters, open caves with overhanging rock formations.[2] It grows on sandy soil that has accumulated on the sandstone floors of the rock shelters. It grows behind the drip line, out of direct sunlight but not in the darkest shadows of the caves. Other plants in this type of habitat and the surrounding forest include white baneberry (Actaea pachypoda), northern maidenhair fern (Adiantum pedatum), jack in the pulpit (Arisaema triphyllum), flowering dogwood (Cornus florida), yellow mandarin (Disporum lanuginosum), smooth hydrangea (Hydrangea arborescens), Indian cucumber-root (Medeola virginiana), Nepalese browntop (Microstegium vimineum), partridge berry (Mitchella repens), clearweed (Pilea pumila), Christmas fern (Polystichum acrostichoides), great rhododendron (Rhododendron maximum), poison ivy (Toxicodendron radicans), and maple-leaf viburnum (Viburnum acerifolium).[4] Roundleaf catchfly (Silene rotundifolia) and littleflower alumroot (Heuchera parviflora) are common associates.[5]

The main threat to this species is damage to its habitat during recreational activities.[2] Hiking, camping, and rock climbing are popular pursuits in the area.[4] Trampling destroys the plants, compacts the soil, and damages the seeds and rhizomes. Explorers invade the rock shelters and build fires, dump garbage, and dig in the soil for archaeological artifacts. Logging, another threat, opens the forest and increases light levels, decreases water, and increases the invasion of introduced species of plants.[2]

Conservation activities include the installation of small fences around the plants and the redirection of trails through less sensitive habitat.[4]

References[edit]

  1. ^ a b Solidago albopilosa. Flora of North America.
  2. ^ a b c d e Solidago albopilosa. The Nature Conservancy.
  3. ^ Braun, E.L. 1942. A new species and a new variety of Solidago from Kentucky. Rhodora. 44: 1-4. IN: Solidago albopilosa. Center for Plant Conservation.
  4. ^ a b c d Solidago albopilosa. Center for Plant Conservation.
  5. ^ White, D. L. and N. C. Drozda. (2006). Status of Solidago albopilosa Braun (White-Haired Goldenrod) (Asteraceae), a Kentucky Endemic. Castanea 71:2 124.

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