| Schizachyrium
scoparium (Michx.) Nash
by Terra Crampton,
Native Plants Class 2003
Common names: little bluestem, broom bluestem, broom beardgrass,
Family: Poaceae
Synonymy: Andropogon scoparius Michx (4)
Etymology: From the Greek schizien, to split, and scopa, meaning
thin branch or broom-like (5).
Identification
Growth form: Little bluestem is a medium height grass (to 3') with
coarse stems and basal leaves (1,2). It is well adapted to fine, medium
and coarse textured soils and grows at a moderate rate (2). Its shape
and orientation is erect and grows actively in summer and fall (2). It
is generally nonrhizomatous but may form an open or loose sod with short
rhizomes connecting small tufts under wet conditions (3).
Roots: Little bluestem's root system is deep and fibrous with individual
roots that are relatively fine with diameters ranging from 0.1-1mm. Most
roots grow almost vertically downwards to depths of 1.3-1.75 m but some
may extend laterally from the bunches (3).
Stem:
Leaves: Little bluestem has very flat bluish basal shoots (1).
Foliage color is gray-green but often purplish at the base of the stem
and the entire plant is reddish after frost. Leaves are 20-36 cm long
and are flat, slender, and smooth but often covered with hair at the base
next to the sheath. Leaves tend to fold with maturity (1, 2, 3).
Inflorescences/flowers:
Fruit: Little bluestem spikelets grow in pairs; 1 is sessile and
1 is pedicellate. The sessile spikelet is perfect and 2-flowered with
the upper flower fertile. Pedicellate spikelets are staminate or neuter
(3). Seeds are inconspicuous and brown in color (2).
Similar species: Three currently recognized varieties include Schizachyrium
scoparium var. scoparium, Schizachyrium scoparium
var. stoloniferum (Nash) J. Wipff, and Schizachyrium scoparium
var. divergens (Hack.) Gould (4).
Ecology
Life history: Perennial
Native/introduced: Little bluestem is one of the most widely distributed
native grasses in North America (1).
Photosynthetic pathway: C3
Phenology: The bloom period for little bluestem is summer with
fruit and seed production periods in summer until fall (2). It is described
as an early to mid-successional grassland species and seed is generally
wind-dispersed. Compared to other Great Plains grass species, little bluestem
is relatively tolerant of drought during seedling establishment (3). It
has fair shade tolerance and will grow on a wide variety of soils but
is well adapted to drained, medium to dry, infertile soils (1).
Distribution: Little bluestem is distributed throughout The United States,
including Hawaii with the exception of Oregon, Alaska, and Nevada (1).
Field germination appears to be relatively low with requirements of light,
stratification, and daytime temperatures of 20-30 degrees Celsius to achieve
high germination rates.
Uses
Little bluestem is a fair forage species and is readily grazed by livestock,
deer and elk. It is also suitable for hay (1). It has medium protein potential
and is considered a fodder product (2).
References
1. National Resources Conservation Services, USDA Plants website,
http://plants.usda.gov/schizacyrium scoparium
2. http://plants.usda.gov/cgi_bin/plant_attribute.cgi?symbol=SCSC
3. http://www.fs.fed.us/database/feis/plants/graminoid/schsco/botanical_and_ecological
characteristics
4. http://www.fs.fed.us/database/feis/plants/graminoid/schsco/introductory.html
5. http://www.winternet.com/~chuckg/dictionary.html
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