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An Assessment of Exotic Plant Species of Rocky Mountain National Park

Table 2 - Summary of Screening Assessment Results

Species Name Origin
(1=non-native N. America)
(2=native N. America, non-native to RMNP)
(3=not know native RMNP)		 Current Distribution
(1=few, scattered)
(2=intermed., patchy)
(3=many, dense)		 Potential Distribution
(15 possible)		 Potential Impact
(40 possible)
Agropyron cristatum
1
3
6
19
Agropyron intermedium
1
3
6
23
Agropyron repens
1
2
6
33*
Agrostis stolonifera
1
3
8
22
Alopecuris pratensis
1
2
6
19
Alyssum alyssoides
1
--
6
16
Amaranthus retroflexus
1,2
--
9
19
Ambrosia tomentosa
3
2
6
21
Amsinckia menziesii
3
--
6
14
Arabis glabra
3
2
6
17
Asparagus officinalis
1
2
4
14
Barbarea vulgaris
1
1
6
18
Berteroa incana
1
1
9
20
Bromus inermis
1
3
6
33*
Bromus japonicus
1
--
9
17
Bromus tectorum
1
3
13
25*
Camelina microcarpa
1
--
6
16
Capsella bursa-pastoris
1
2
9
17
Carduus nutans
1
3
9
26*
Carum carvi
1
--
9
17
Centaurea diffusa
1
2
11
33*
Centaurae maculosa
1
2
11
26*
Cerastium vulgatum
1
--
11
18
Chenopodium album
1
2
9
19
Chenopodium capitum
3
--
9
16
Chenopodium glaucum
1
--
9
19
Cirsium arvense
1
3
11
31*
Cirsium vulgare
1
3
11
26*
Conium maculatum
1
3
9
17
Convolvulus arvensis
1
2
6
26*
Conyza canadensis
3
--
9
20
Conyza schiedeana
3
--
6
14
Chrysanthemum leucanthemem
1
3
9
29*
Cynoglossum officinale
1
2
11
20
Dactylis glomerata
1
3
6
29*
Descurainia sophia
1
3
9
18
Draba nemorosa
3
--
6
14
Dianthus armeria
1
--
9
20
Erodium cicutarium
1
--
6
17
Erysimum cheiranthoides
1,2
--
6
16
Euphorbia esula
1
3
11
38*
Euphorbia serpyllifolia
3
--
6
19
Festuca ovina
1
3
9
21
Festuca pratensis
1
2
6
21
Gypsophilia paniculata
1
--
9
26*
Hieracium aurantiacum
1
2
6
20
Hypericum perforatum
1
1
13
38*
Iva xanthifolia
3
--
6
14
Lactuca serriola
1
2
6
16
Lappula redowskii
3
--
9
19
Linaria dalmatica
1
3
9
31*
Linaria vulgaris
1
3
11
27*
Lepidium campestre
1
3
6
14
Lepidium densiflorum
1,2
--
9
17
Lepidium perfoliatum
1
--
6
17
Lolium perenne
1
2
6
20
Lychnis alba
1
--
11
22
Lythrum salicaria
1
1
11
31*
Madia glomerata
3
--
6
16
Matricaria matricaroides
3
3
9
19
Matricaria perforata
1,2
--
9
17
Medicago lupulina
1
--
9
20
Melilotus alba
1
3
9
24*
Melilotus officinalis
1
3
9
24*
Mentha spicata
1
--
6
9
Onobrychis viciaefolia
1
--
7
15
Phalaris arundinaceae
2
--
9
36*
Phleum pratense
1
3
8
15
Plantago major
1,2
2
9
22
Poa annua
1,2
--
11
17
Poa bulbosa
1
2
6
15
Poa compressa
1
3
6
15
Poa pratensis
1,2
3
11
27*
Polygonum arenastrum
3
--
6
17
Polygonum convolvulus
1
--
6
22
Potentilla norvegica
1
2
6
16
Psathyrostachys juncea
1
--
6
18
Rheum rhubarbarum
1
2
4
10
Rumex acetosella
1
--
9
22
Rumex crispis
1
3
9
23
Salsola collina
3
--
9
16
Salsola iberica
1
2
11
19
Sisymbrium altissimum
1
--
11
17
Sisymbrium officinale
1
--
6
16
Solanum triflorum
3
--
6
15
Sonchus arvensis
1
3
9
27*
Spergularia rubra
1
--
6
13
Taraxacum officinale
1,2
3
13
21
Thlapsi arvense
1
--
9
17
Tragopogon dubius
1
2
6
12
Trifolium hybridum
1
3
6
15
Trifolium pratense
1
3
6
15
Trifolium repens
1,2
3
6
21
Triticum aestivum
1
2
6
13
Triticum sp.
1
2
0
0
Verbascum thaspus
1
3
9
14
Verbena bracteata
3
--
6
11
Verbesina enceloides
3
--
6
12

* Species of concern

Note: Species given two scores for Origin category are identified as non-native and native species of North America by different sources.

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