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Oplismenus

John Peter Thompson Upper Marlboro August 2011

S pecial thanks to Kerrie Kyde for comments, edits contributions and guidance hirtellus s s p. undulatifolius (A r d.) U. S cholz

Kerrie L. Kyde, Department of Natural R esources, Bugwood.org Wavyleaf Basketgrass Invades M a ryla nd

http://www.dnr.state.md.us/wildlife/Plants_Wildlife/WLBG/index.asp 1996 Ed Uebel discovered WLBG in Patapsco Valley State Park and at Liberty Reservoir in Maryland Peterson PM, Terrell EE , Uebel EC, Davis CA, S cholz H, S oreng R J. 1999

Oplismenus hirtellus subspecies undulatifolius, a new record for North America. Castanea 64. (2): 201-202 (1999) - En Keys. Geog=3 S ystematics: ANGIOS PE R MAE (GR AMINEAE : OPLIS ME NUS ) US A, (199902902). Hernwood landfill property has been treated

By permission Kerrie Kyde All rights reserved MAEDN Areas of Invasion of WLBG in the Mid Atlantic http://upload.wikimedia.o rg/wikipedia/commons/th umb/6/63/Oplismenus_u ndulatifolius_tizimizasa0 1.jpg/250px- Oplismenus_undulatifoliu s_tizimizasa01.jpg

http://upload.wikimedia.org/wi kipedia/commons/thumb/6/63 /Oplismenus_undulatifolius_ti zimizasa01.jpg/250px- Oplismenus_undulatifolius_tiz imizasa01.jpg Monograph of the g enus Oplismenus (Gramineae) By URSULA SCHOLZ

http://herbarium.usu.edu/translate/opli smenusscholz.html Oplismenus P. B ea uv. s ec t. S cabriseta S chlecht., Linnaea 31: 301 (1861-62). O. affinis S c hult. --O. affinis S chult. var. affinis --O. affinis va r. humboldtianus U. S c holz O. baronii C a m us O. burmannii (Retz.) P. Beauv. --O. burmannii (Retz.) P. B eauv. var. burmannii --O. burmannii va r. lanatus (Buse) Backer --O. burmannii va r. multisetus (Hochst. ex. A. Rich.) U. S cholz O. flavicomus M ez O. gracillimus M ez O. humbertianus C a m us s ec t. Oplismenus O. aemulus --O. aemulus (R. Br. ) Roem. & S chult. var. aemulus --O. aemulus va r. flaccidus (R. Br. ) Domin --O. aemulus va r. densiflorus U. S c holz O. compositus (L..) P. B ea uv. --O. compositus (L..) P. B ea uv. va r. compositus --O. compositus va r. rariflorus (Presl) U. Scholz --O. compositus va r. sylvaticus (Lam.) U. Scholz

O. hirtellus (L.) P. Beauv. --O. hirtellus (L.) P. Beauv. subsp. hirtellus --O. hirtellus subsp. acuminatus (Nees) U. S cholz

--O. hirtellus (L.) P. Beauv. subsp. capensis (Hochst.) Mez ex U. S cholz --O. hirtellus subsp. fasciculatus U. S cholz --O. hirtellus subsp. imbecillis (R . Br.) U. S cholz ----O. hirtellus f. imbecillis ----O. hirtellus f. lanceolatus U. S cholz --O. hirtellus subsp. japonicus (S teud.) U. S cholz --O. hirtellus subsp. microphyllus (Honda) U. S cholz --O. hirtellus subsp. psilostachys (Honda) U. S cholz --O. hirtellus subsp. setarius (Lam.) Mez ex E kman --O. hirtellus subsp. tsushimensis (Honda) U. S cholz --O. hirtellus subsp. undulatifolius (Ard.) U. S cholz

Ambroise Marie François Joseph Palisot Baron de Beauvois Essai d'une nouvelle Agrostographie: avec figures (de Beauvois, 1812)

Gen... Xlv. OPLISMENUS Nos. , Oplismène. PL xi, fig. m. De Όπλίμενοσ, Armatus. Oplismenus FI. Ow.; Orthopogonis spec. Rob. Brow. ; Panici spec. Lin. , etc. Axis spicatus : Spica composite : Spiculæ alterna; : Locustæ subunilaterales, sessiles.—Glumæ inæquales, setigeræ- — Flosc. Infer. neut., 2-paIeaceus : Palea infer. sub apice ferè emarginato setigera : super, duplô minor, intégra. — Flosc. Super, hermaphrod. : Paleae coriaceo - induralæ :' infer. sub apice emarginato mucronata. — Squamæ ovatæ, oblusæ , spatulœformes. — Ovarium simplex : Stylus 2-partitus : Stigmata aspergilliformia. — Semen obtusum, liberuni, ferè sulcatum. The home florist: a treatise on the cultivation, management and adaptability of flowering and ornamental , designed for the use of amateur florists (Long, 1874)

http://otvetin.ru/uploads/posts/2010-04/1270671471_oplimenushirtellusvariegatus0404.jpg (Long, 1874)

Panicum variegatum (35, 30 to 60, 90°).— A very attractive grass, of trailing or creeping habit, excellent for hanging baskets or pot culture in the greenhouse or window. The are willow shaped, and distinctly variegated with white, rose and green. The requires a warm place, and rather delights in shade ; propagates from cuttings. The Gardeners' Chronicle: A Weekly Illustrated Journal Of Horticulture And Allied Subjects (The Chronicle, 1885) [1]

Cyrtodeira fulgida.—This is a pretty plant for a warm greenhouse or stove; the soft velvety foliage and bright scarlet tubular flowers making it an admirable plant to grow in a pan, or in a basket, to be suspended. It will form a pleasing contrast to the rather monotonous edgings of Panicum variegatum and Isolepis gracilis that is so often found bordering beds and benches in warm houses http://aquiya.skr.jp/zukan/Oplismenus_hirtellus.jpg The Gardeners' chronicle: a weekly illustrated journal of horticulture and allied subjects (Vol. V 3rd series) (The Chronicle, 1889)

OPLISMENUS BURMANNI VARIEGATUS. This is the correct name of what we have long been accustomed to call Panicum variegatum. … They thrive best in a moderately high temperature (about 60°) ; where with a little shade, they take on a beautiful rosy-tint. If much shaded they are apt to turn green. The florists' manual; A Reference Book for Commercial Florists Wm. Scott 1899

PANICUM VAR IE GATUM.A very pretty free growing, creeping plant with white and pink striped conservatory basket plant, or for planting in borders among palms and ferns in a permanent border under glass, it has no special value to the florist. There are several other species of Panicum, ornamental, and useful to the private gardener A manual of the grasses of New South Wales (M aiden, 1898)

Oplismenus compositus, B ea uv

Value as a fodder.— Affords a bite for stock, but it is so closely appressed to the ground that they do not often touch it; it may also not be palatable. Other uses.— It forms a dense turf under trees, possessing a considerable value for such a purpose in cases where it can get sufficient moisture. It is a common weed in bush-houses. Habitat and range.— Victoria to Queensland, in the moister parts. In our Colony, confined to the Coast districts. Found also in and the Pacific Islands, and New Zealand. Notes on genera of : I- IV, Parts 1-4. Biological S ociety of Washington. Page 152, 153, 154 Chase, A. (1906). Introduction

In the secondary literature, Oplismenus is frequently ignored. Estimates of the number of species fluctuate between 10 and 40. Earlier, morphologic-systematic research of the genus was usually geographically restricted; they focused on specific areas of circulation. (E.g.. Hitchcock & Chase: America; Honda: Japan).

Mez began a monographic study of the genus in the 1920s. However this study was never finished. It remained unpublished and is found as an unfinished manuscript in the Botanical Museum of Berlin-Dahlem.

Monographie der Gattung Oplismenus (Scholz, 1981) Experimentally assessing the invasive potential of plants (Talley & Ramsey, 2009)

Oplismenus hirtellus ssp. undulatifolius OHU Oplismenus hirtellus ssp. setarius OHS Oplismenus hirtellus ssp. varigatus OHV

All the subspecies differed in the length and density of trichomes on the surfaces. Trichomes are hair cells or leaf hairs derived from specialized epidermal cells on leaf or stem surfaces. Experimentally assessing the invasive potential of plants (Talley & Ramsey, 2009)

Oplismenus hirtellus ssp. undulatifolius OHU Oplismenus hirtellus ssp. setarius OHS Oplismenus hirtellus ssp. varigatus OHV

OHV did not produce any , OHU produced inflorescences with white stigmas, OHS produced reddish-purple stigmas Experimentally assessing the invasive potential of plants (Talley & Ramsey, 2009)

Oplismenus hirtellus ssp. undulatifolius OHU Oplismenus hirtellus ssp. setarius OHS Oplismenus hirtellus ssp. varigatus OHV

“There was some question whether OHU was a reverted phenotype from the cultivar OHV, but we found no evidence to support this.” Experimentally assessing the invasive potential of plants (Talley & Ramsey, 2009)

Oplismenus hirtellus ssp. undulatifolius OHU Oplismenus hirtellus ssp. setarius OHS Oplismenus hirtellus ssp. varigatus OHV

OHV often reverts to an all green form, this phenotype does not resemble OHU, lacks leaf trichomes, has not produced seeds or inflorescences.

Experimentally assessing the invasive potential of plants (Talley & Ramsey, 2009)

Oplismenus hirtellus ssp. undulatifolius OHU Oplismenus hirtellus ssp. setarius OHS Oplismenus hirtellus ssp. varigatus OHV

OHU has sticky awns, which adhere to fur & clothing, leading to seed dispersal over long distances. OHS also has sticky awns and Seems to produce inflorescences later than OHU. Early flowering is associated with plant invasiveness (Pyšek and Richardson, 2007). Experimentally assessing the invasive potential of plants (Talley & Ramsey, 2009)

Oplismenus hirtellus ssp. undulatifolius OHU Oplismenus hirtellus ssp. setarius OHS Oplismenus hirtellus ssp. varigatus OHV

Seed germination trials show that OHU seeds can hold dormancy due to an impermeable membrane that must be scarified.

Experimentally assessing the invasive potential of plants (Talley & Ramsey, 2009)

Oplismenus hirtellus ssp. undulatifolius OHU Oplismenus hirtellus ssp. setarius OHS Oplismenus hirtellus ssp. Varigatus OHV

OHU seeds are somewhat freeze tolerant and may be viable in the soil seed bank f or at least a couple of years or more. PVSP Wavyleaf Basketgrass Herbicide Comparison Test 2008 11/6/08 Trade Name Common Name Assessment Rep.Mea Preliminary results Application 9/10/08 Blk A Blk B Blk C n of herbicide trials Envoy Plus 16 Clethodim 7.0 7.5 5.0 6.5 2008 Envoy Plus 24 Clethodim 8.0 8.5 8.0 8.2 Fluazifop + Fusion 6* fenoxaprop 8.0 5.0 6.0 6.3 Fluazifop + Fusion 12* fenoxaprop 6.0 5.0 5.0 5.3 Fusilade DX 12 Fluazifop-p-butyl 7.5 5.0 7.0 6.5 Fusilade DX 24 Fluazifop-p-butyl 6.5 6.0 2.0 4.8 Roundup WM 18 Glyphosate 9.0 9.5 9.0 9.2 Roundup WM 36 Glyphosate 9.0 9.0 9.0 9.0 Plateau 5 Imazapic 4.0 3.0 4.0 3.7 Plateau 10 Imazapic 5.0 3.0 6.0 4.7 Assure II 6* Quizalofop 4.0 4.0 6.0 4.7 Assure II 12* Quizalofop 4.0 3.0 8.0 5.0 Poast 16 Sethoxydim 7.0 6.5 6.0 6.5 Poast 32 Sethoxydim 6.0 6.0 7.0 6.3 Sulfometuron Oust XP 2 methyl 3.0 3.0 3.0 3.0 Untreated Check 0.0 0.0 0.0 0.0 By permission Kerrie Weeded Check 9.5 9.5 9.5 9.5 Kyde. All rights reserved EDRR Progression • Discover it • Sound the alarm • Find funding for it • M a p it • Figure out how to kill it • Kill it (multiple approaches and tim es ) • Report to interested parties • M onitor it forever (or until you retire)

By permission Kerrie Kyde All rights reserved Ongoing efforts…

• Effective herbicide treatment • Complete mapping of infestations • Features of infested habitats • Genetics of closely related taxa • Ecosystem effects – changes in insect and mammalian herbivore patterns • Manual and chemical targeted control • Alerting stakeholders and researchers

By permission Kerrie Kyde All rights reserved Maryland Partners U.S. Forest Service Forest Health Protection National Fish and Wildlife Foundation U.S.D.A. APHIS Maryland DNR, Wildlife and Heritage Service: Land Acquisition and Planning Maryland Park Service: Maryland Department of Agriculture Maryland Forest Service Maryland Invasive Species Council C ontrol Lane Heimer, Washington, Frederick and Montgomery County Maryland Weed Teams University of Maryland Coop Extension Anacostia Watershed Society, Maryland Native P la nt Society, Sierra Club; Greater Patapsco Community

By permission Kerrie Kyde All rights reserved John Peter Thompson

Invasive Notes www.ipetrus.blogspot.com

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