Goodyera Pubescens

''Goodyera pubescens'', the downy rattlesnake plantain, (also known as ''Peramium pubescens'' ) is one of the most common orchids native to eastern North America. It is found from Florida to Nova Scotia, west to eastern Oklahoma, Minnesota and Ontario.Kew World Checklist of Selected Plant Families
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''Goodyera pubescens'' is an evergreen terrestrial herb with variegated leaves. The variegation is in the form of a densely reticulated network of veins that are a much lighter green than the rest of the leaf tissue. It is a creeping plant that divides on the ground surface and sends out short stolons. It may be terrestrial or, occasionally, epipetric, growing on rock shelves. It prefers mildly to moderately acidic soils, such as in oak-heath forests.

Description

''Goodyera pubescens'' is a plant in the Orchidaceae (orchid) family that is commonly found in North America. The genus ''Goodyera'' are terrestrial plants with a fleshy rhizome with basal evergreen leaves in a rosette pattern - frequently having white or pale green markings. Inflorescences are in the form of a spike of small flowers, usually white with green or brown markings and have fragrant odor. Most of the plants, excluding and petals, are covered in small hairs. The primary difference between ''Goodyera'' and '' Spiranthes'' (A similar genus in the family Orchidaceae) is that ''Goodyera'' have elliptic leaves with white or pale green markings.

''Goodyera pubescens'' flowers in mid July-early September with a small spike inflorescence of between 10 and 57 cylindric flowers. The leaves have the white-green marbling in the form of veins throughout, broadly elliptic to broadly ovate (2.1-6.2 x 1.3–3 cm), with either an acute or obtuse apex. The peduncle (stem that connects the stalk to a floret) is 11–35 cm long. Flowers: Lateral sepals 3.1 - 5.3 mm long with distinct petals of 3.6 - 5.7mm. The petals lip is scrotiform (pouch shaped) 2.5 - 4.2 x 2.2 - 3.5mm in size with the apex reflexed (bent outwards) with a slightly tuberculate (bumpy/rough) outer surface. The inner surface is smoother but has thicker veins throughout. The anthers are inflexed (bent inwards) within a cup-shaped clinandrium (an orchid structure beneath the anther). The white flowers are usually atop a leafless stalk.

There are similar species within the genus ''Goodyera'' that ''G. pubescens'' can be confused with. The Dwarf Rattlesnake plantain ''G. repens'' has smaller flowers that only have inflorescence on one side of the stalk. Both ''G. tesselata'' and '' G. oblongifolia'' are only found in Canada. ''Goodyera tesselata'' can be differentiated by its dull green leaves with much paler veins, ''G. oblongifolia'' leaves only have one primary vein compared to the more dense network of veins of ''G. pubescens''. All of the rattlesnake plantains (''Goodyera'') are described as such because their venation resembles snakeskin.

Distribution and habitat

''Goodyera'' ''pubescens'' is found through much of the eastern part of North America, ranging from Florida all the way north to Ontario, going as far west as Oklahoma. (USA: AL, AR, CT, DC, DE, FL, GA, IA, IL, IN, KY, MA, MD, ME, MI, MN, MO, MS, NC, NH, NJ, NY, OH, OK, PA, RI, SC, TN, VA, VT, WI, WV; Canada: NB, NS, ON, QC.)

''Goodyera pubescens'' thrives in mesic to dry forests. This species prefers well drained, slightly acidic soil with a somewhat high sand content. It requires a high amount of shade from shaded canopy or shrubs, but smaller shrubs can easily overtake it. High drainage is essential since orchids can have problems with the soil being over-saturated, often leading to the death of the plant. You can find this species growing in both dry and moist conditions, with a soil mixture of a sandy loam, or loam with a high clay content. It can also be found in deciduous or coniferous forests since they provide the necessary partial shade. ''Goodyera pubescens'' also functions as a National Wetland Indicator Species.

Ecology

Compared to other orchid genera, ''Goodyera'' is fairly hardy - surviving more readily in colder conditions, being able to utilize a wider variety of nutrients, and thriving in more types of soil under more broad lighting conditions. ''Goodyera pubescens'' has a germination rate of over 90% even in very cold climates, which is why it is found in very cold climates such as the northern US and Canada. This species prefers loamy soils or humus, but it will also grow into decaying wood of ''Liriodendron tulipifera'' or ''Quercus alba'' with a preference towards woody substrates with a high amount of fungal activity. However, the rhizomes ''G. pubescens'' can not survive particularly harsh winters in the northern edge of its distribution.

''Goodyera pubescens'' grows via a rhizome in a colonial pattern, flowering only once a year at maturity of 4–8 years of age. After flowering the root will have 1-3 offshoots which then generates new rosettes, creating its offspring after the parent plant dies. Most ''G. pubescens'' individuals do not survive long enough to reach the age of maturity. The mature rosettes flower after being triggered by a dry period in the spring (usually in May) when there is higher than average temperatures. These specific circumstances may not occur in a season and can take several years to occur, explaining the long maturity time. White-tailed deer (''Odocoileus virginianus'') have a preference towards eating the leaves, rosettes, and inflorescences. As deer populations have increased over the last several decades, the number of rosettes per plant has increased to counter the number that get consumed by deer.   

Uses

''Goodyera pubescens'' is largely just seen as a plant kept for visual aesthetic reasons in wildflower plantings due to its interesting leaf structure and resilience. It was once used historically as a medicinal plant by Native Americans for curing numerous ailments. The roots were made into a tea for treating lung inflammation/breathing pain and for snakebites. The leaves were used to improve appetite, cold treatment, kidney problems, joint pain reducer, or even for toothaches. The wilted leaves were used to cool burns, to deal with skin ulcers, or as a pain reliever. These are historical or cultural uses and are no longer currently recommended.

Conservation status

This is one of the more common species of orchids found throughout the U.S., and for the most part is not considered threatened or at risk. The only places it is of concern are in Florida and New York. In Florida this species is considered endangered. In New York it is considered exploitably vulnerable.

Taxonomy

The genus ''Goodyera'' is also colloquially called the rattlesnake plantain. This is because of the snake-like venation pattern that this genus has on the leaves. ''Goodyera pubescens'' was first defined in 1813 in the Hortus Kewensis 2nd edition volume 5. ''Goodyera pubescens'' is the accepted name of this species, and the only legitimate name.

Horticulture/cultivation

This orchid is of a desirable aesthetic to many gardeners, but keeping it alive in a non-wild setting is challenging. The infrequent sunlight, acidic soil, high fungal activity, and drainage required makes difficult to cultivate in gardens. It is only found in specialty nurseries since taking it from the wild is not condoned and will likely kill the specimen.

References

External links

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{{Taxonbar, from=Q3773416

pubescens
Orchids of North America
Plants described in 1805
Flora of Canada
Flora of the Eastern United States