Calamagrostis porteri ssp. insperata
|Ofer Hollow reed grass, Porter's reedgrass, reed bent grass|
|Kimberlie McCue, Ph.D.|
The following Participating Institutions are custodians for this species in the CPC National Collection:
Missouri Botanical Garden
The conservation of Calamagrostis porteri ssp. insperata is fully sponsored.
Kimberlie McCue, Ph.D. contributed to this Plant Profile.
Calamagrostis insperata is a rare, cool season grass. This tufted perennial can stand up to 1 meter in height and is very attractive. Plants are very sensitive to habitat conditions and rarely flower in the wild. Even when they do flower, they rarely set viable seed, and this likely contributes to the rarity of the species.
Distribution & Occurrence
C. insperata often grows in forest openings and along edges of upland woods (Bittner and Gibson 1988). However, its habitat can vary greatly. Many plants can be found on cool, north-facing sandstone bluff edges.
Associated canopy species include: Quercus spp., Acer rubrum, Cornus florida. Ground vegetation species include: Monarda bradburiana, Hedyotis longifolia, Polystichum acrostichoides (Bittner and Gibson 1988).
|Approximately 80 populations in five states.|
Conservation, Ecology & Research
A study of microhabitat relations found that C. insperata is affected by a complex suite of environmental factors, including: photosynthetic photo-flux density, vapor-pressure deficits, and soil temperature (Bittner and Gibson 1998).
Studies are needed to determine populations response to the creation of canopy gaps.
Braun, E.L. 1967. The Monocotyledonae: Cattails to Orchids. Columbus, OH: The Ohio State University Press. 464p.
Roedner, B.J.; Hamilton, D.A.; Evans, K.E. 1978. Rare Plants of the Ozark Plateau: A Field Guide. St. Paul, Minnesota: North Central Forest Experiment Station, U.S. Forest Service. 238p.