Harvest Operations Corp. #2100, 330 – 5th Avenue S.W. Calgary, Alberta T2P 0L4

August 25, 2011

Anne-Marie Erickson Secretary of the Board National Energy Board 444 Seventh Avenue S.W. Calgary, Alberta T2P 0X8

Dear Ms. Erikson,

RE: Supplemental Rare Plant Survey for the Proposed Harvest Operations Corp. (as 1057533 Alberta Ltd.) Gething Source Water Pipeline (NEB File: OF-Fac-OtherComm-Z027-2011-01 0101)

Please find attached the following supplemental report for the proposed Harvest Operations Corp. (as 1057533 Alberta Ltd.) Gething Source Water Pipeline:

• Supplemental Rare Plant Survey for the Proposed Harvest Operations Corp. (as 1057533 Alberta Ltd.) Gething Source Water Pipeline (August 2011).

Please contact me by telephone at 403-233-6667 or by email at [email protected] if you have any questions.

Sincerely,

1057533 Alberta Ltd.

Daryl Baxandall Manager, Facilities 1057533 Alberta Ltd. is a wholly owned subsidiary of Harvest Operations Corp.

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SUPPLEMENTAL RARE PLANT SURVEY FOR THE PROPOSED HARVEST OPERATIONS CORP (AS 1057533 ALBERTA LTD.) GETHING SOURCE WATER PIPELINE

August 2011 7172

Prepared for: Prepared by:

Harvest Operations Corp. TERA Environmental Consultants 2100, 330 - 5th Avenue S.W. Suite 1100, 815 - 8th Avenue S.W. Calgary, Alberta T2P 3P2 Calgary, Alberta T2P 0L4 Ph: 403-265-2885

Harvest Operations Corp. Supplemental Rare Plant Survey Gething Source Water Pipeline August 2011 / 7172

TABLE OF CONTENTS Page 1.0 INTRODUCTION ...... 1 1.1 Objectives ...... 1 2.0 METHODS ...... 3 2.1 Rare Plant Survey ...... 3 2.2 Non-Native and Invasive Species ...... 3 2.3 Forest Pests ...... 3 3.0 KNOWN SPECIES OF CONCERN ...... 4 3.1 Federal Species of Concern ...... 4 3.2 Provincial Species of Concern ...... 4 4.0 RESULTS ...... 5 4.1 Survey Limitations ...... 5 4.2 Rare Plants and Rare Ecological Communities ...... 5 4.3 Non-Native and Invasive Species ...... 5 4.4 Forest Pests ...... 5 5.0 DISCUSSION AND MITIGATION RECOMMENDATIONS ...... 6 5.1 General Vegetation Recommendations ...... 6 6.0 REFERENCES ...... 7 6.1 Literature Cited ...... 7 6.2 GIS Data and Mapping References ...... 8

LIST OF FIGURES Figure 1 Aerial View ...... 2

LIST OF APPENDICES Appendix A Observed Plant Species – By Type and Common Name ...... 9

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1.0 INTRODUCTION 1057533 Alberta Ltd. is a wholly owned subsidiary of Harvest Operations Corp. (Harvest) based in Calgary, Alberta. Harvest has applied to the National Energy Board (NEB) under Section 58 of the NEB Act for approval to construct and operate approximately 6.6 km of 168.3 mm (6 inch) outside diameter (O.D.) pipeline to transport non-potable (saline) water from a new source water well in 12-11-111-12 W6M near Rainbow Lake in northwest Alberta to the existing Harvest Hay Pad site located at a-61-H/94-I-9 in northeast British Columbia (BC) (Figure 1). The 12-11-111-12 W6M location was chosen since it is the closest, most promising location for a significant source of injection water. The purpose of the source water pipeline is to provide additional water injection capacity at the a-61-H/94-I-9 pad site for reservoir pressure maintenance to enhance the Hay Pad site production. The additional water injection volumes are needed to replace current injection water shortages from the existing area water supply wells.

The proposed source water pipeline will be constructed within a 15 m wide right-of-way aligned adjacent to Harvest's existing all-weather access road and a proposed powerline easement within Alberta and directly adjacent to Harvest's all-weather access road within BC. Construction will be conducted off of the existing all-weather access road and the proposed powerline easement, with the exception of two 10 m by 30 m areas of temporary workspace that will be required on both sides of a crossing of the Little Hay River in BC.

Subject to regulatory approval, construction of the source water pipeline will commence during dry, nonfrozen conditions in fall 2011 or frozen conditions in late 2011 or early 2012. Construction is expected to last approximately five weeks with operation start-up planned upon completion. Harvest is planning to conduct a trenchless crossing of the Little Hay River immediately upon approval.

As part of the NEB Section 58 Application, an Environmental and Socio-economic Assessment (ESA) was prepared by TERA Environmental Consultants (TERA) (TERA 2011a). To support the application, TERA was commissioned by Harvest to conduct rare plant field work along the proposed pipeline route. TERA conducted a rare plant habitat assessment on October 21, 2010 and the results were presented in the Rare Plant Habitat Assessment report (TERA 2011b). To supplement the field work conducted in October 2010, TERA conducted a supplemental rare plant survey along the proposed pipeline route in July 2011. The following report provides the results of the supplemental rare plant survey.

For ease of description, the proposed pipeline route is described using Kilometre Posts (KPs), from the source water well in 12-11-111-12 W6M (KP 0.0) to the existing Harvest Hay Pad site in a-61-H/94-I-9 (KP 6.6) (Figure 1).

1.1 Objectives The objectives of the supplemental rare plant survey were to:

• identify any rare plant species and rare ecological communities along the proposed route as defined by the Species at Risk Act (SARA), the Committee on the Status of Endangered Wildlife in Canada (COSEWIC), the Alberta Wildlife Act, the BC Wildlife Act, the BC Identified Wildlife program, the Alberta Conservation Information Management System (ACIMS) and the BC Conservation Data Centre (CDC);

• identify any uncommon sites or habitat features along the proposed route with high potential to support rare plant species;

• record the abundance and distribution of non-native, invasive species; and

• provide mitigation recommendations in the event that rare plants, rare ecological communities or invasive species infestations are observed.

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20 111-12-6 21 111-12-6 22

A 111-12-6 I AUGUST 2011

B ¯ FIGURE 1

M AERIAL VIEW U

A L SUPPLEMENTAL 71 T O RARE PLANT SURVEY R FOR THE C

E PROPOSED HARVEST

B H OPERATIONS CORP. GETHING

L S SOURCE WATER PIPELINE

I

A

T 7172

I e r R i v B R Proposed Well Site a y L H i t t l e ! Existing Well Site Existing Well Site 61 17 a-61-H/94-I-9 111-12-6 16 !. Kilometre Post 111-12-6 15 111-12-6 14 )!! !. 111-12-6 Proposed Pipeline KP 6.6 Existing Pipeline

KP 6 Existing Access Road !. Provincial Boundary 51

SCALE: 1: 30,000 m 94I9H 0 200 400 600 (ALL LOCATIONS APPROXIMATE) Proposed Water Source Well 12-11-111-12 W6M KP 5 8 KP 4 9 !. 111-12-6 KP 3 !. 111-12-6 KP 2 !. !. )! !. !.KP 0 41 11 10 111-12-6 111-12-6 !

Date of Imagery: November 5, 2010; SPOT 5 Satellite Imagery 2010 CNES, Licensed by ! Iunctus Geomatics Corp., www.TerraEngine.com; Existing Well Sites and Pipelines, Access Roads: IHS Inc., 2011; Hydrology: IHS Inc, 2004.

Although there is no reason to believe that there are any errors associated with the data used to generate this product or in the product itself, users of these data are advised that errors in the data may be present. 31

PROJECT AREA 5 111-12-6 4 111-12-6 3 ALBERTA 111-12-6 2 Edmonton 111-12-6

21

Calgary

t7172_Veg_Overview_Figure1_Landscape.mxd Harvest Operations Corp. Supplemental Rare Plant Survey Gething Source Water Pipeline August 2011 / 7172

2.0 METHODS The proposed pipeline traverses the Central Mixedwood Natural Subregion of Alberta and the Boreal White and Black Spruce Biogeoclimatic Zone in the Fort Nelson Forest District (FD) of BC (Natural Regions Committee 2006, BC CDC 2011a).

For information regarding pre-field assessment methods, study area, ecosystem classification, and rare plant species and ecological communities with potential to occur in the vicinity of the Project, refer to the Rare Plant Habitat Assessment report for the Project (TERA 2011b).

2.1 Rare Plant Survey Information collected during the desktop review and rare plant habitat assessment survey identified areas of interest, as well as rare plant species and rare ecological communities with potential to occur in the vicinity of the Project.

Rare plant survey methods were based on survey guidelines developed by the Alberta Native Plant Council (2000) and Penny and Klinkenberg (2007). Rare plant specialists traversed the route, noted the dominant plant communities, recorded all identifiable species, and searched for rare plants and uncommon habitat. A purposeful meander technique was used to survey the proposed right-of-way. At locations where potentially important microsites were observed, more detailed searches were performed.

The supplemental rare plant survey was conducted on July 7 and 8, 2011.

2.2 Non-Native and Invasive Species Weed species listed by the Alberta Weed Control Act, the BC Weed Control Act and the North East Invasive Plant Committee (NEIPC) Plan and Profile document (NEIPC 2010) were reviewed prior to commencement of the survey.

In addition, there are many additional, non-listed species that are introduced (i.e., non-native) to Alberta and BC that can be invasive in certain land uses, including some agronomic and horticultural species. The status of species as native or not is according to the list of all elements in Alberta (ACIMS 2011a) and the BC Species and Ecosystem Explorer (BC Ministry of Environment [MOE] 2011).

All listed weeds and non-listed, introduced species were recorded at all locations where they were observed during the survey. Classes were assigned for the density and distribution of each weed species, in each land use or quarter-section where they were observed. The density classes used were those established by the BC Ministry of Forests (Luttmerding et al. 1990).

2.3 Forest Pests The Alberta portion of the route is located in the mountain pine beetle (MPB) management zone designated as an Inactive Holding Zone (Alberta Sustainable Resource Development [ASRD] 2009).

The BC portion of the route is not located within an Emergency Bark Beetle Management Area (EBBMA) for MPB, Douglas fir beetle or spruce beetle (BC Ministry of Forests, Lands and Natural Resource Operations 2010).

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3.0 KNOWN SPECIES OF CONCERN

3.1 Federal Species of Concern There are no potential species listed for the Central Mixedwood Natural Subregion or the Boreal White and Black Spruce Biogeoclimatic Zone that have a SARA or COSEWIC designation. No previously recorded occurrences of plant species with a SARA or COSEWIC designation are known from within 5 km of the Project (ACIMS 2011b, BC CDC 2011b).

3.2 Provincial Species of Concern There are no potential plant species listed for the Central Mixedwood Natural Subregion that are designated under the Alberta Wildlife Act. There are no potential plant species or rare ecological communities listed for the Boreal White and Black Spruce Biogeoclimatic Zone that are designated under the BC Identified Wildlife Program.

No previously recorded occurrences of rare plants or rare ecological communities are known from within 5 km of the Project (ACIMS 2011b, BC CDC 2011b).

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4.0 RESULTS Ecosite Phases observed during the October 2010 rare plant habitat assessment were confirmed during the July 2011 rare plant survey. For full results of the 2010 rare plant habitat assessment, as well as information regarding Ecosite Phases observed along the Project route, refer to the Rare Plant Habitat Assessment report for the Project (TERA 2011b).

A list of all species observed at the time of survey is provided in Appendix A. Species nomenclature is according to the list of all elements in Alberta (ACIMS 2010a), with more current taxonomic information drawn from NatureServe (2011), when necessary.

4.1 Survey Limitations The survey did not address all nonvascular species (mosses, liverworts, lichens). However, all identifiable nonvascular species have been reported in the same manner as vascular species.

Although rare plant surveys can confirm the presence of rare plants, they cannot definitively determine that rare plants are not present at a site.

4.2 Rare Plants and Rare Ecological Communities No COSEWIC or SARA-listed plant species were observed during the survey. No species designated under the Alberta Wildlife Act or the BC Identified Wildlife Program were observed during the survey. No ACIMS or BC CDC listed rare vascular plant species or rare ecological communities were observed during the assessment.

4.3 Non-Native and Invasive Species No Prohibited Noxious or Noxious weed species, as designated under the Alberta Weed Control Act, were observed during the survey. No Provincial Noxious or Regional Noxious weeds, as designated under the BC Weed Control Act, were observed during the survey. No Prohibited Invasive, Primary Invasive or Secondary Invasive weeds, as designated by the NEIPC, were observed during the survey.

Few non-listed, introduced plant species were observed during the survey. Weeds occurred infrequently and at low densities along the route. Weed species observed at the time of survey are included in Appendix A.

4.4 Forest Pests No restrictions for timber hauling are required for Inactive Holding Zones in Alberta (ASRD 2011). The Project is not located within an EBBMA in BC.

No signs of forest pest infestations were observed along the proposed pipeline route in either province during the survey.

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5.0 DISCUSSION AND MITIGATION RECOMMENDATIONS No rare plant species or rare ecological communities were observed during the survey. Therefore, no site-specific mitigation is warranted to address rare plant issues along the proposed pipeline route. If any plant species or communities with special conservation status are observed on the right-of-way during construction, implement the Plant Species of Concern Discovery Contingency Plan included as Appendix 6I in the Environmental Protection Plan (EPP) for the Project (TERA 2011c).

5.1 General Vegetation Recommendations Although the pipeline route has been aligned to minimize environmental impacts, some impacts will inevitably occur during the construction phase and throughout the operational life of the pipeline. Implement mitigative measures to reduce potential environmental impacts on vegetation and reduce the likelihood of weed introduction or spread during construction and/or operation of the pipeline, by adhering to mitigation measures presented in the Rare Plant Habitat Assessment report and EPP for the Project (TERA 2011b,c).

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6.0 REFERENCES

6.1 Literature Cited Alberta Conservation Information Management System. 2011a. List of All Elements in Alberta. May 2011. Alberta Tourism, Parks and Recreation. Website: http://www.tpr.alberta.ca/parks/heritageinfocentre/datarequests/docs/List_of_All_Elements_MAY_ 2011.xls. Accessed: August 2011.

Alberta Conservation Information Management System. 2011b. ACIMS Element Occurrences (Part 1: Non-sensitive and Part 2: Sensitive, by township) (digital files). Alberta Tourism, Parks and Recreation. Edmonton, AB. Website: http://tpr.alberta.ca/parks/heritageinfocentre/datarequests/default.aspx. Acquired: June 2011. Last Update Check: July 2011.

Alberta Native Plant Council. 2000. ANPC Guidelines for Rare Plant Surveys in Alberta. March 2000. Website: http://www.anpc.ab.ca/assets/rareplant.pdf. Accessed: August 2011.

Alberta Sustainable Resource Development. 2009. Mountain Pine Beetle Management Zones 2009. Edmonton, Alberta. Website: http://www.mpb.alberta.ca/Files/pdf/MountainPineBeetle- ManagementZones2009.pdf. Accessed: August 2011.

Alberta Sustainable Resource Development. 2011. Forest Management Branch Directive 2011-04: Mountain Pine Beetle Log Management. April 15, 2011. Edmonton, Alberta. Website: http://www.srd.alberta.ca/FormsOnlineServices/Directives/documents/2011-04- MountainPineBeetle-LogManagement-Apr2011.pdf. Accessed: August 2011.

British Columbia Conservation Data Centre. 2011a. Conservation Data Centre Mapping Service. British Columbia Ministry of Environment. Victoria, BC. Website: http://www.env.gov.bc.ca/atrisk/ims.htm. Accessed: August 2011.

British Columbia Conservation Data Centre. 2011b. Endangered Species and Ecosystems - Masked Sensitive Occurrences and Non Sensitive Occurrences (digital files). British Columbia Ministry of Environment. Victoria, BC. Website: https://apps.gov.bc.ca/pub/geometadata/home.do. Acquired: August 2011. Last Update Check: August 2011.

British Columbia Ministry of Environment. 2011. BC Species and Ecosystems Explorer. Victoria, BC. Website: http://a100.gov.bc.ca/pub/eswp/. Accessed via: http://www.env.gov.bc.ca/atrisk/toolintro.html. Accessed: August 2011.

British Columbia Ministry of Forests, Lands and Natural Resource Operations. 2010. Emergency Bark Beetle Management Area and Strategic Planning Maps. June 15, 2010. Website: http://www.for.gov.bc.ca/hfp/mountain_pine_beetle/maps/ebbma/. Accessed: August 2011.

Luttmerding, H.A., D.A. Demarchi, E.C. Lea, D.V. Meidinger and T. Vold (editors). 1990. Describing Ecosystems in the Field. Second edition. B.C. Min. Env., Lands and Parks and B.C. Ministry of Forests. MOELP Manual 11. Victoria, BC.

NatureServe. 2011. NatureServe Explorer - An Online Encyclopedia of Life. Website: http://www.natureserve.org/explorer/index.htm. Accessed: August 2011.

Natural Regions Committee. 2006. Natural Regions and Subregions of Alberta. Compiled by D.J. Downing and W.W. Pettapiece. Government of Alberta. Pub. No. T/852. 254 pages, 1 map. Website: http://tpr.alberta.ca/parks/heritageinfocentre/naturalregions/default.aspx.

North East Invasive Plant Committee. 2010. 2010 Plan and Profile. April 28, 2010. North East Invasive Plant Committee. Fort Nelson, BC. Website: http://prrd.bc.ca/services/environmental/weed_control/documents/NEIPCPlan_Profile_2010.pdf. Accessed: August 2011.

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Penny, J. and R. Klinkenberg. 2007. Protocols for Rare Vascular Plant Surveys. In: Klinkenberg, Brian. (Editor) 2009. E-Flora BC: Electronic Atlas of the Plants of British Columbia. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. Website: http://www.geog.ubc.ca/biodiversity/eflora/ProtocolsforRarePlantSurveys.html. Accessed via: http://www.eflora.bc.ca/. Accessed: August 2011.

TERA Environmental Consultants. 2011a. Environmental and Socio-Economic Assessment for the Proposed Harvest Operations Corp. (as 1057533 Alberta Ltd.) Gething Source Water Pipeline. Prepared for Harvest Operations Corp. TERA Environmental Consultants. 2011b. Rare Plant Habitat Assessment for the Proposed Harvest Operations Corp. (as 1057533 Alberta Ltd.) Gething Source Water Pipeline. Prepared for Harvest Operations Corp. TERA Environmental Consultants. 2011c. Environmental Protection Plan for the Proposed Harvest Operations Corp. (as 1057533 Alberta Ltd.) Gething Source Water Pipeline. Prepared for Harvest Operations Corp.

6.2 GIS Data and Mapping References IHS Inc. 2004. IHS Hydro Line Data (digital file). Calgary, AB. Available: http://energy.ihs.com/Solutions/Regions/Canada/. Acquired: June 2011. Last Update Check: July 2011.

IHS Inc. 2004. IHS Hydro Region Data (digital file). Calgary, AB. Available: http://energy.ihs.com/Solutions/Regions/Canada/. Acquired: June 2011. Last Update Check: July 2011.

IHS Inc. 2011. IHS Enhanced Pipeline Data; IHS Road Segments; and IHS Wells - Surface Hole (digital files). Calgary, AB. Available: http://energy.ihs.com/Solutions/Regions/Canada/. Acquired: July 2011. Update Interval: Monthly.

Iunctus Geomatics. 2010. SPOT5 2.5m Panchromatic Satellite Imagery (digital file). Lethbridge, AB. Available: http://www.terraengine.com. Acquired: June 2011.

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APPENDIX A

OBSERVED PLANT SPECIES – BY TYPE AND COMMON NAME

Common Name Scientific Name TREES aspen Populus tremuloides black spruce Picea mariana tamarack Larix laricina white birch Betula papyrifera white spruce Picea glauca SHRUBS beaked willow Salix bebbiana bracted honeysuckle Lonicera involucrata bristly black currant Ribes lacustre Canada buffaloberry Shepherdia canadensis common Labrador tea Ledum groenlandicum dwarf birch Betula pumila false mountain willow Salix pseudomonticola flat-leaved willow Salix planifolia green alder Alnus viridis ssp. crispa low-bush cranberry Viburnum edule northern black currant Ribes hudsonianum northern gooseberry Ribes oxyacanthoides prickly rose Rosa acicularis red-osier dogwood Cornus stolonifera river alder Alnus incana saskatoon Amelanchier alnifolia Scouler's willow Salix scouleriana velvet-fruited willow Salix maccalliana wild red currant Ribes triste wild red raspberry Rubus idaeus FORBS, DWARF SHRUBS Arctic starflower Trientalis europaea arrow-leaved coltsfoot Petasites frigidus var. sagittatus arum-leaved arrowhead Sagittaria cuneata Bicknell's geranium Geranium bicknellii bishop's-cap Mitella nuda bog cranberry Vaccinium vitis-idaea bunchberry Cornus canadensis Canada goldenrod Solidago canadensis cloudberry Rubus chamaemorus common bladderwort Utricularia vulgaris common cattail Typha latifolia common duckweed Lemna minor common mare's-tail Hippuris vulgaris common pink wintergreen Pyrola asarifolia cream-colored vetchling Lathyrus ochroleucus dewberry Rubus pubescens dwarf raspberry Rubus arcticus fleshy stitchwort Stellaria crassifolia floating marsh-marigold Caltha natans fringed loosestrife Lysimachia ciliata

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Common Name Scientific Name heart-leaved twayblade Listera cordata lady fern Athyrium filix-femina Lapland buttercup Ranunculus lapponicus large-leaved white water crowfoot Ranunculus aquatilis large-leaved yellow avens Geum macrophyllum Lindley's aster Aster ciliolatus long-leaved chickweed Stellaria longifolia many-flowered yarrow Achillea sibirica marsh cinquefoil Potentilla palustris marsh hedge-nettle Stachys palustris marsh skullcap Scutellaria galericulata marsh willowherb Epilobium palustre marsh yellow cress Rorippa palustris meadow horsetail Equisetum pratense narrow spinulose shield fern Dryopteris carthusiana narrow-leaved bur-reed Sparganium angustifolium northern bastard toadflax Geocaulon lividum northern bedstraw Galium boreale northern grass-of-parnassus Parnassia palustris oak fern Gymnocarpium dryopteris one-flowered wintergreen Moneses uniflora one-sided wintergreen Orthilia secunda pale coralroot Corallorhiza trifida palmate-leaved coltsfoot Petasites frigidus var. palmatus round-leaved bog orchid Platanthera orbiculata round-leaved sundew Drosera rotundifolia showy aster Eurybia conspicua slender arrow-grass Triglochin palustris small bog cranberry Oxycoccus microcarpus small enchanter's nightshade Circaea alpina sweet-scented bedstraw Galium triflorum tall lungwort Mertensia paniculata three-leaved Solomon's-seal Smilacina trifolia touch-me-not species Impatiens sp. twinflower Linnaea borealis violet species Viola sp. water arum Calla palustris water parsnip Sium suave water-hemlock Cicuta maculata water-milfoil Myriophyllum verticillatum western dock Rumex occidentalis wild lily-of-the-valley Maianthemum canadense wild sarsaparilla Aralia nudicaulis wild strawberry Fragaria virginiana wild vetch Vicia americana woodland horsetail Equisetum sylvaticum wormseed mustard Erysimum cheiranthoides yellow avens Geum aleppicum yellow rattle Rhinanthus minor yellow water crowfoot Ranunculus gmelinii GRASSES, SEDGES, RUSHES blister sedge Carex vesicaria

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Common Name Scientific Name bluejoint Calamagrostis canadensis bog sedge Carex paupercula brownish sedge Carex brunnescens common tall manna grass Glyceria grandis creeping spike-rush Eleocharis palustris drooping wood-reed Cinna latifolia fowl manna grass Glyceria striata hairy wild rye Leymus innovatus Kentucky bluegrass Poa pratensis mud sedge Carex limosa Norway sedge Carex norvegica rough hair grass Agrostis scabra sheathed cotton grass Eriophorum vaginatum short-awned foxtail Alopecurus aequalis slender wheatgrass Elymus trachycaulus slough grass Beckmannia syzigachne small bottle sedge Carex utriculata small-fruited bulrush Scirpus microcarpus thin-flowered sedge Carex tenuiflora three-seeded sedge Carex trisperma tufted hair grass Deschampsia cespitosa water sedge Carex aquatilis MOSSES, LICHENS, LIVERWORTS dog lichen Peltigera canina hair-cap moss species Polytrichum sp. knight's plume moss Ptilium crista-castrensis liverwort Marchantia polymorpha peat moss species Sphagnum sp. reindeer lichen Cladina rangiferina Schreber's moss Pleurozium schreberi stair-step moss Hylocomium splendens studded leather lichen Peltigera aphthosa WEEDS, AGRONOMICS alsike clover Trifolium hybridum common nettle Urtica dioica rough cinquefoil Potentilla norvegica sweet-clover species Melilotus sp.

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