A Phytogeographical Classification of the North American Pacific Coast Based on Climate, Vegetation and a Floristic Analysis of Vascular Plants

Table 5

Summary of differential and common taxa for the boreal (BOR, including the Sitkan and Hudsonian provinces) and Oregonian (ORE) phytogeographical areas. Scores are presence percentages (rounded). Species marked with an asterisk are Oregonian-Californian differential taxa (see Table 6).

	BOR	ORE		BOR	ORE
Number of sites	21	70		21	70
Number of taxa	110	213		110	213
Boreal provinces: Differential taxa			Oregonian province: Differential taxa
Betula papyrifera var. kenaica	87	—	Polygonum paronychia	—	17
Puccinellia hultenii	61	—	Veronica scutellata	—	16
Senecio pseudoarnica	61	—	Pteridium aquilinum var. pubescens	—	16
Equisetum sylvaticum	56	—	Maianthemum dilatatum	—	16
Ligusticum scoticum subsp. hultenii	52	—	Schoenoplectus americanus	—	14
Poa eminens	52	—	Carex pansa	—	14
Stellaria humifusa	52	—	Trifolium wormskjoldii	—	14
Empetrum nigrum	48	—	Tsuga heterophylla	—	13
Geocaulon lividum	48	—	Agrostis pallens	—	13
Linnaea borealis subsp. americana	48	—	Vicia nigricans subsp. gigantea	—	13
Picea glauca	48	—	Cuscuta salina	—	13
Rosa acicularis subsp. acicularis	48	—	Spiranthes romanzoffiana	—	13
Shepherdia canadensis	48	—	Pseudotsuga menziesii var. menziesii	—	11
Lathyrus palustris	43	—	Thuja plicata	—	11
Lycopodium annotinum	43	—	Grindelia integrifolia	—	11
Orthilia secunda	43	—	Poa confinis	—	11
Sorbus sitchensis	43	—	Lilaeopsis occidentalis	—	11
Angelica lucida	30	—	Lathyrus littoralis	—	10
Dendranthema arcticum subsp. arcticum	26	—	Baccharis pilularis	—	8
Poa macrocalyx	22	—	Armeria maritima subsp. californica	—	7
Artemisia campestris subsp. borealis	17	—
Atriplex alaskensis	17	—	Common taxa
Salicornia marítima	17	—	Leymus mollis subsp. mollis	91	50
Carex ramenskii	14	—	Carex lyngbyei	87	39
Epilobium ciliatum subsp. glandulosum	14	—	Argentina egedii subsp. egedii	78	50
Parnassia palustris var. palustris	14	—	Plantago maritima var. juncoides	70	24
Puccinellia nutkaensis	13	—	Picea sitchensis	48	69
Puccinellia phryganodes subsp. phryganodes	13	—	Hordeum brachyantherum subsp. brachyantherum*	61	11
Rhinanthus minor subsp. groenlandicus	13	—	Lathyrus japonicus var. maritimus	61	50
			Honkenya peploides subsp. major*	56	11
Oregonian province: Differential taxa			Conioselinum gmelinii	56	3
Gaultheria shallon	—	60	Viburnum edule*	52	1
Vaccinium ovatum	—	50	Festuca rubra subsp. rubra	52	26
Lonicera involucrata var. involucrata	—	43	Achillea millefolium	52	26
Salix hookeriana	—	41	Vaccinium uliginosum*	48	1
Ammophila arenaria	—	41	Triglochin maritimum	48	33
Pinus contorta var. contorta	—	39	Dryopteris expansa	48	4
Myrica califórnica	—	37	Oplopanax horridus*	43	4
Carex obnupta	—	36	Menziesia ferruginea*	43	3
Juncus lesueurii	—	33	Tiarella trifoliata*	43	3
Polystichum munitum	—	33	Vaccinium membranaceum*	43	3
Hypochaeris radicata	—	27	Athyrium filix-femina subsp. cyclosurum	43	1
Sarcocornia perennis*	—	26	Deschampsia cespitosa subsp. beringensis	35	37
Juncus falcatus	—	26	Mertensia maritima*	35	1
Distichlis spicata	—	24	Calamagrostis canadensis*	22	7
Jaumea carnosa	—	24	Chamerion angustifolium subsp. circumvagum*	22	1
Arctostaphylos uva-ursi	—	24	Galium aparine	22	3
Anaphalis margaritacea	—	23	Equisetum telmateia var. braunii*	13	8
Cakile marítima	—	23	Glaux maritima*	13	20
Cytisus scoparius	—	23	Ranunculus cymbalaria*	13	1
Lupinus littoralis	—	23	Atriplex patula	9	21
Alnus rubra	—	20	Fragaria chiloensis subsp. pacifica	9	34
Tanacetum camphoratum	—	20	Juncus balticus	9	17
Cardionema ramosissimum	—	17	Cakile edentula subsp. edentula var. edentula	4	29