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Hoyt Arboretum: Collected from the north side of the Wildwood Trail, where it switchbacks in the Prunus section. Found with other common weeds and native understory herbs: Rubus armeniacus, Rubus ursinus, Geum macrophyllum, Dactylis glomerata.

Morton Arboretum Morton Arboretum.

Mt Pisgah Arboretum 34901 Frank Parrish Rd, Eugene, OR 97405. Found on island in Coast Fork of the Willamette River, across from outlying barn on Seavey Rd just north of intersection of Seavey, Quarry and Meadow Rds. found on the south west side of isl.

Hoyt Arboretum: Collected at the top of the Overlook Trail, about 20 ft north of large water tank, under a planted Laburnum anagyroides tree. Found with Polystichum munitum, Berberis nervosa.

Beggars Tick Wildlife Refuge. Springwater corridor and 111th.

North end of Smith and Bybee lake, Interlakes trail head parking lot loop. Collection made at parking lot.

Smith and Bybee Wetland Natural Area. 5337 N. Marine Dr is nearest address. From Interlakes Trail Head walk about 400m on trail, then turn S. and walk about 25m into open grassy meadow.

H. C. Ranch.

Chiba Prefecture

Hoyt Arboretum: Collected from roadside, on the west side of Fairview Blvd, about 40 m north of the arboretum Visitor Center. Found with other weeds and Rubus ursinus, Rubus parviflorus, Gaultheria shallon.

Elk Rock Island, access from Spring Park Natural Area (SE Sparrow & 19th ave). Walk to W side of Island along shore towards the N end.

Maricara Natural Area (PP&R): Collected from western edge of natural area, about 50 ft east of SE 30th Avenue & SW Trail 5. In weedy right-of-way.

Hoyt Arboretum: Visitor Center parking lot, NW corner of middle island in lot.

Metro: Howell Lake.

Kyonggi-do

Hoyt Arboretum: Collected from the eastern side of the Beech Trail, where the trail flattens, near bottom of the Magnolia section. Found on hillslope with Geranium robertianum, Tellima grandiflora, Taraxacum officinale.

3523 SE 157th ave. Portland OR 97236, Private collection, flower bed in NW corner or back yard.

Portland: Powell Butte Nature Park.

Birong Valley.

Portland: 221 NE 58th ave. Heritage tree.

Hoyt Arboretum, on Wildwood Trail.

1.4 miles west of intersection of Germantown Road and NW Bridge ave. in big switchback on S side of road.

Willamette Mission State Park, road side ditch. Waconda and Wheatland intersection.

Hoyt Arboretum: From weedy roadside near gravel pullout on east side of SW Fairview Blvd., about 10 meters north of its intersection with SW Fischer Lane.

Hoyt Arboretum, exotic weed in Cotoneaster collection.

Portland: Hoyt Arboretum, E Side of Fairview Blvd. From main parkinglot entrance go SW 30m, Just off n side of road into shoulder.

Hoyt Arboretum: Collected on north side of Wildwood Trail, about 50 ft after the Connector Trail splits towards the White Pine Trail and SW Fairview Blvd. Found with Polystichum munitum and Rubus ursinus.

Jilin Province

Skinners Butte, Skinners Butte Loop Rd. In park plants found in open grassy area.

Hoyt Arboretum: Collected across SW Fischer Lane from the Bamboo Garden, on a weedy, grassy hillslope near the road. Found with Holcus lanatus, Equisetum arvense, Rubus armeniacus, Cirsium arvense.

Hoyt Arboretum: Hillslope in the Winter Garden, about 2 m west of where the Wildwood Trail intersects with the Beech Trail. Likely intentionally planted.

Access via Old City Dump/Metro Restoration site. St Johns Maintenance, 9387 N Columbia Blvd. From gate/bridge at Maint bldg. drive to "y" in road, go Rt. drive to end of unnamed rd to NW end. Park, walk to Bybee/Columbia slough flood gate.Walk 195m W.

Mt. Chiri National Park.

Hoyt Arboretum: Located about 9m south on SW Fairview Blvd, on north side of road, about 0.5 to 1.0m offroad.

Elk Rock Island: Bushman Plot 108, near Willamette River.

Hoyt Arboretum: East side of the Spruce Trail, about 15 meters north of its intersection with SW Fischer Lane.

Intersection of Burnside & 48th: about 100m west, on south side of road on Burnside.

Hoyt Arboretum: Located off-of the Wildwood Trail, at its intersection with a Connector Trail towards Fairview Blvd/White Pine Trail.

Hoyt Arboretum: Collected the north side of Kingston Blvd, about 50 m southeast of where the Maple Trail bends northward. Trailing vine about 10 cm tall with small prickles. Male flowers only.

Salem, down town, intersection of Center and Church street. Plant in curb.

Fan Si Pan Mountain.

Metro: Smith & Bybee Lakes.

Grant Park (PP&R): Located in developed garden bed along north park boundary.

Alton Baker Park Eugene,413 Day Island Rd Eugene, OR 97401. About 500 feet from parking area west down Day Island Rd to open grassy area.

Colton: About 6km NE on Hwy 211 to Unger Rd. Drive west on Unger about 4km. On both sides of road.

Hoyt Arboretum: Collected in the Holly Section on the upper Holly Trail, right side of steps, in understory of Arbutus menziesii. Found with Hieracium umbellatum and Geranium lucidum.

From Jasper drive about 5km SE, the collection was made on private property in the hills to the E. No access, location information, 5KM vague range.

Powell Butte Nature Park: Near intersection of SE 162nd & SE Powell Blvd.

Willamette Park SW Macadam Ave and Nebraska st. On river front just south of boat launch about 30m.

Hoyt Arboretum: Located just below hill from the Stevens Pavilion, and below/westside of Fairview Blvd. Collected just off trail, at the intersection of the Fir Trail and Connector Trail (from Spruce Trail).