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| ## Thickspike gayfeather  {#thickspike-gayfeather .Title-Header}      |
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| *Liatris pycnostachya* Michx.                                         |
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| Plant Symbol = LIPY                                                   |
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Contributed by: USDA NRCS Plant Materials Center, Manhattan, Kansas

![](media/image2.jpeg){width="2.6798611111111112in"
height="2.6145833333333335in"}

R. Alan Shadow, USDA NRCS East Texas PMC, Nacogdoches, Texas.

##### Alternate Names {#alternate-names .Header-3}

Tall gayfeather, prairie gayfeather, blazing star, prairie blazing star,
and hairy button snakeroot, Kansas gayfeather

##### Uses {#uses .Header-3}

Cattle graze thickspike gayfeather and it is considered a decreaser in
pastures under heavy grazing pressure (Menhusen 1973). Thickspike is a
particularly beautiful member of the genus *Liatris* with its height and
large sized flowering spike. These flowering spikes make long lasting
cut flowers since the heads will proceed to open just as if they were
still on the plant. If the spike is air dried rapidly in the dark the
flowering spike will retain much of its color and can be used in
attractive dry plant arrangements.

Kindscher (1992) indicated that the corm of thickspike was used by
Native Americans and others to treat gonorrhea. Art (1991) indicated
that it could be used to treat kidney diseases. Birds use the seed for
food and rodents eat the corms. Thickspike gayfeather can be used for
roadside and park beautification, prairie restoration, wildlife cover
and food, landscaping, and to increase plant diversity in natural and
man made prairie communities.

**Status**

Please consult the PLANTS Web site and your State Department of Natural
Resources for this plant's current status (e.g. threatened or endangered
species, state noxious status, and wetland indicator values).

#####  {#section .Header-3}

##### Description {#description .Header-3}

*General*: Thickspike gayfeather belongs to the sunflower or composite
family (Asteraceae). *Liatris pycnostachya* is a tall, hardy, native
perennial herbaceous species that has spectacular magenta
inflorescences. Single to multiple stems arise from a solid corm that is
7 to 10 cm in diameter and supports the plants deep, fibrous root (5 to
15 common) system. The simple non-branched stems are up to 1.5 meters
tall. The species narrow, dark green leaves have a light colored mid-rib
and are alternately arranged on the stem. The numerous basal leaves are
the longest and they gradually shorten in length farther up the stem.
Both stems and leaves normally display short, stiff hairs. The
inflorescence is a long spike of sessile cylindrical heads 8 to 11 mm
tall. The flower heads have 5 to 7 individual rose-purple flowers, each
with 5 long, slender, pointed petals or bracts which tend to spread and
curve back toward their bases. Bracts of this species may have a
purplish tinge. The flowers are given a somewhat fuzzy appearance by
extended white stamens (male flower parts) and pistils (female flower
parts). The spike itself may be up to 60 cm of the stem length. The
flowers bloom from the top down so flowering covers an extended period
of time. The flowers are cross pollinated with bumble bees and native
pollinators doing most of the work. The fruit of thickspike gayfeather
is a narrow, brownish, 10 ribbed achene that is 5 to 6 mm long, with
tufts of bristles longer than the achene attached to its upper end. The
seed heads should be harvested in the fall after they appear dry and
fluffy, but before they are blown away by the wind. There are 333,000
achenes per kg of seed or about 131,000 seed units per pound of
thickspike gayfeather.

*Distribution*: For current distribution, please consult the Plant
Profile page for this species on the PLANTS Web site. This plant ranges
from Kentucky to Minnesota and eastern North Dakota south from there to
Louisiana and eastern Texas. It grows naturally in the eastern 1/3 of
Kansas.

*Habitat*: Thickspike gayfeather grows best in low, moist, tallgrass
prairies that are dominated by big bluestem (*Andropogon gerardii*). It
may grow near the base of slopes since it requires more water than many
of the other members of the genus *Liatris*. Art (1991) reported that
gayfeather grew best on moist, well drained, and slightly acidic to
neutral (pH 5.5 to 7.0) soils. Weaver and Fitzpatrick (1934) found it on
56 percent of low prairies and only 25 percent of upland prairies that
they studied.

##### Adaptation {#adaptation .Header-3}

Weaver (1954) indicated that *Liatris pycnostachya* was characteristic
of areas supporting big bluestem and was rarely found in much drier or
much wetter grassland areas. This species of *Liatris* is probably the
least drought tolerant and may need to be supplemented with irrigation
to bloom vigorously in very dry weather.

##### Establishment {#establishment .Header-3}

Thickspike gayfeather is established in field and prairie restoration
projects easiest from seed. A firm, clean, weed free seedbed should be
prepared by disking, harrowing, and cultipacking the planting site.
Chemical weed control can be used to reduce competition and limit the
competition from perennial weed species. Seedbed should be firm enough
to allow planting of the seed units at a depth of 6 mm. A drill equipped
with a legume seed box and depth bands would allow for good depth
placement of the seed unit and good seed to soil contact. A seeding rate
of 30 Pure Live Seed (PLS) units per 30 cm of row should provide a
consistent full stand. To plant a prairie restoration or diverse
wildlife planting a seeding rate of 65 gm PLS per ha incorporated into
the seeding mixture would be acceptable. Application of fertilizer the
year of establishment is discouraged unless phosphorous and potassium
are at extremely low levels on your soil test for the planting site.
Absolutely no nitrogen fertilizer should be applied the first year to
discourage weed competition from annual weed species.

##### Management {#management .Header-3}

Mowing can be used to reduce weed competition in newly established
fields as long as mower height is kept above seedling height.
Cultivation and herbicides can be used if gayfeather is planted in rows
for seed production. Dead plant residue can be burned if done prior to
plant growth in the spring. A non-selective herbicide (i.e. Roundup) can
be used in the spring to remove early cool season species before plant
regrowth begins.

##### Pests and Potential Problems {#pests-and-potential-problems .Header-3}

Rabbit protection might be required for gayfeather seedlings and newly
developing shoots in the spring. Thickspike gayfeather stems tend to
lodge in a monoculture situation. In a natural prairie setting other
grass and forb plants tend to support the stems and keep them upright.

##### Environmental Concerns {#environmental-concerns .Header-3}

Thickspike gayfeather does not spread vegetatively and seedlings are
easy to control and maintain.

##### Seeds and Plant Production {#seeds-and-plant-production .Header-3}

##### Thickspike gayfeather can be propagated by seed or division of its corm. Art (1991) divided the corm vertically into pieces which each contained at least one bud. Plant the divided corm vertically with 30 to 60 cm spacing between individuals and the bud 5 cm below the soils surface. Seed propagation is easier than vegetative although the seed units require stratification. Seed germination will improve with aging of the seed for at least three years beyond the harvest date. Hesse (1973) obtained the best germination (up to 85%) with gayfeather seed units after 15 weeks of cold, moist stratification treatment.  {#thickspike-gayfeather-can-be-propagated-by-seed-or-division-of-its-corm.-art-1991-divided-the-corm-vertically-into-pieces-which-each-contained-at-least-one-bud.-plant-the-divided-corm-vertically-with-30-to-60-cm-spacing-between-individuals-and-the-bud-5-cm-below-the-soils-surface.-seed-propagation-is-easier-than-vegetative-although-the-seed-units-require-stratification.-seed-germination-will-improve-with-aging-of-the-seed-for-at-least-three-years-beyond-the-harvest-date.-hesse-1973-obtained-the-best-germination-up-to-85-with-gayfeather-seed-units-after-15-weeks-of-cold-moist-stratification-treatment. .Header-3}

##### Stratified seed can be planted in the early spring or summer and non-stratified seed can be planted in the fall (Platt and Harder 1991). Seedlings can be started in greenhouses from stratified seed to produce transplants. Seed units planted 6 mm deep in flats can be transplanted out doors in 8 to 12 weeks. Some nurseries plant seed in June to have corms to transplant in a dormant state the following spring. Seed fields can be harvested by direct combining and seed processed using a scalper and fanning mills. The seed units (achenes) are run through a hammer mill to remove the tuft of bristles. Manhattan Plant Materials Center (PMC) production records indicate that a purity of 97 to 99 percent is normal with a germination percentage of 29 to 71 and dormancy number of between 3 and 22 percent depending on the year. An eight year average of seed production yield indicates that 73 kg per ha was produced at Manhattan, Kansas.  {#stratified-seed-can-be-planted-in-the-early-spring-or-summer-and-non-stratified-seed-can-be-planted-in-the-fall-platt-and-harder-1991.-seedlings-can-be-started-in-greenhouses-from-stratified-seed-to-produce-transplants.-seed-units-planted-6-mm-deep-in-flats-can-be-transplanted-out-doors-in-8-to-12-weeks.-some-nurseries-plant-seed-in-june-to-have-corms-to-transplant-in-a-dormant-state-the-following-spring.-seed-fields-can-be-harvested-by-direct-combining-and-seed-processed-using-a-scalper-and-fanning-mills.-the-seed-units-achenes-are-run-through-a-hammer-mill-to-remove-the-tuft-of-bristles.-manhattan-plant-materials-center-pmc-production-records-indicate-that-a-purity-of-97-to-99-percent-is-normal-with-a-germination-percentage-of-29-to-71-and-dormancy-number-of-between-3-and-22-percent-depending-on-the-year.-an-eight-year-average-of-seed-production-yield-indicates-that-73-kg-per-ha-was-produced-at-manhattan-kansas. .Header-3}

#####   {#section-1 .Header-3}

##### Cultivars, Improved, and Selected Materials (and area of origin) {#cultivars-improved-and-selected-materials-and-area-of-origin .Header-3}

Contact your local Natural Resources Conservation Service office for
more information. Look in the phone book under "United States
Government." The Natural Resources Conservation Service will be listed
under the subheading "Department of Agriculture."

'Eureka' thickspike gayfeather is a cooperative cultivar release by the
USDA-NRCS Manhattan Plant Materials Center (PMC) and the Nebraska
Agricultural Experiment Station in 1975. The original collections of
Eureka were made in November 1970 in Greenwood County, Kansas. Plant
height, vigor and stand of Eureka were consistently superior to the
collections of materials it was tested against. Eureka is adapted to the
eastern 1/3 of Kansas, western Missouri, southeastern Nebraska,
northeastern Oklahoma, and southwestern Iowa. This species is used in
range reseeding mixtures, roadside and park beautification and wildlife
habitat enhancement. Foundation class seed is available from USDA, NRCS
PMC at Manhattan, Kansas.

Central Iowa Germplasm and Northern Iowa Germplasm are source identified
releases made in 1999 by the Elsberry PMC in cooperation with Iowa
Department of Transportation, University of Northern Iowa, Iowa Crop
Improvement Association, and the Native Roadside Vegetation Center in
Cedar Falls, IA. In 2001, the Elsberry PMC released the additional
source identified lines Southern Iowa Germplasm with all the same
cooperators and Northern Missouri Germplasm and Western Missouri
Germplasm in cooperation with the Missouri Department of Conservation
and the Missouri Audubon Society of Jefferson City, Missouri. G1 class
seed is being produced in limited quantities by the USDA, NRCS PMC at
Elsberry, Missouri.

##### References {#references .Header-3}

#####  {#section-2 .Header-3}

##### Art, H.W. 1991. *The Wildflower Gardener's Guide: Midwest, Great Plains, and Canadian Prairies* *Edition*. Storey Communications Inc., Pownal. Vermont. {#art-h.w.-1991.-the-wildflower-gardeners-guide-midwest-great-plains-and-canadian-prairies-edition.-storey-communications-inc.-pownal.-vermont. .Header-3}

#####  {#section-3 .Header-3}

##### Hesse, M. C. 1973. Germination of seven species of wildflowers as affected by different pregermination conditions. *Nebraska Department of Roads, Interim* *Report HPR-1(10*).  {#hesse-m.-c.-1973.-germination-of-seven-species-of-wildflowers-as-affected-by-different-pregermination-conditions.-nebraska-department-of-roads-interim-report-hpr-110. .Header-3}

#####   {#section-4 .Header-3}

##### Kindscher, K. 1992. *Medicinal Wild Plants of the Prairie*. University Press of Kansas, Lawrence, Kansas. {#kindscher-k.-1992.-medicinal-wild-plants-of-the-prairie.-university-press-of-kansas-lawrence-kansas. .Header-3}

#####  {#section-5 .Header-3}

##### Menhusen, B.R. 1973. Ecology of the Prairie Species of the Genus *Liatris.* Pp 60-62. In Hulbret (ed.) *Third* *Midwest Prairie Conference Proceedings*. Division of Biology, Kansas State University, Manhattan, Kansas. {#menhusen-b.r.-1973.-ecology-of-the-prairie-species-of-the-genus-liatris.-pp-60-62.-in-hulbret-ed.-third-midwest-prairie-conference-proceedings.-division-of-biology-kansas-state-university-manhattan-kansas. .Header-3}

#####  {#section-6 .Header-3}

##### Platt, D.R. and L. H. Harder. 1991. Growing Native Wildflowers. *The Kansas Wildflower Society Handbook*. Kauffman Museum, Bethel College. Newton, Kansas. {#platt-d.r.-and-l.-h.-harder.-1991.-growing-native-wildflowers.-the-kansas-wildflower-society-handbook.-kauffman-museum-bethel-college.-newton-kansas. .Header-3}

#####  {#section-7 .Header-3}

##### Weaver, J.E. and T.J. Fitzpatrick. 1934. The Prairie. *Ecological Monographs* 4(2): 109-295. {#weaver-j.e.-and-t.j.-fitzpatrick.-1934.-the-prairie.-ecological-monographs-42-109-295. .Header-3}

#####  {#section-8 .Header-3}

##### Weaver, J.E. 1954. *North American Prairie*. Lincoln, NE: Johnsen Publishing Co. {#weaver-j.e.-1954.-north-american-prairie.-lincoln-ne-johnsen-publishing-co. .Header-3}

#####  {#section-9 .Header-3}

##### Prepared By {#prepared-by .Header-3}

Richard Wynia, USDA NRCS Manhattan Plant Materials Center, Manhattan,
Kansas

##### Species Coordinator {#species-coordinator .Header-3}

Jerry Kaiser, USDA NRCS Elsberry Plant Materials Center, Elsberry, MO

##### Edited: 080317 jsp {#edited-080317-jsp .Header-4}

For more information about this and other plants, please contact your
local NRCS field office or Conservation District, and visit the PLANTS
Web site\<[http://plants.usda.gov](http://plants.usda.gov/)\> or the
Plant Materials Program Web site
\<[http://Plant-Materials.nrcs.usda.gov](http://Plant-Materials.nrcs.usda.gov/)\>

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*To file a complaint of discrimination write USDA, Director, Office of
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