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

Table 7

Summary of differential and common taxa of the Californian (CAL, including the Northern,Southern and Martirense provinces) and tropical (TRO, including the Bajacalifornian and Sanlucan provinces) phytogeographical zones. Further differential taxa of the two zones can be found in Table 6 (species marked with an asterisk in Table 6 are Californian differential taxa). Scores as in Table 5.

	TRO	CAL		TRO	CAL
Number of sites	91	94		91	94
Number of taxa	240	389		240	389
Tropical provinces: Differential taxa			Common taxa
Cenchrus palmeri	64	—	Allenrolfea occidentalis *	50	1
Maytenus phyllantoides	49	—	Abronia maritima *	35	16
Jouvea pilosa	29	—	Frankenia palmeri *	33	6
Sporobolus virginicus	29	—	Batis maritima *	32	11
Euphorbia leucophylla	27	—	Atriplex julacea *	30	10
Proboscidea althaefolia	25	—	Monanthochloe littoralis	27	15
Cyrtocarpa edulis	22	—	Camissonia crassifolia	22	4
Ipomoea pes-caprae	22	—	Lycium californicum *	19	15
Rhizophora mangle	22	—	Euphorbia misera *	19	16
Oenothera drummondii var. thalassaphila	20	—	Arthrocnemum subterminale *	19	13
Fouquieria diguetii	20	—	Sarcocornia pacifica	19	34
Avicennia germinans	20	—	Lycium brevipes *	18	15
Laguncularia racemosa	20	—	Suaeda taxifolia *	16	4
Phaseolus acutifolius var. latifolius	20	—	Croton californicus	16	6
Lycium fremontii var. congestum	19	—	Stenocereus gummosus	15	12
Opuntia cholla	19	—	Mesembryanthemum crystallinum *	15	16
Encelia ventorum	18	—	Atriplex canescens var. canescens	14	8
Froelichia interrupta	18	—	Suaeda moquinii	14	4
Dalea divaricata subsp. anthonyi	16	—	Lycium andersonii	12	5
Asclepias subulata	15	—	Spartina foliosa *	12	28
Atriplex magdalenae	15	—	Abronia umbellata	10	10
Porophyllum maritimum	15	—	Atriplex barclayana subsp. barclayana	9	1
Jatropha cinérea	14	—	Suaeda esteroa *	7	14
Antigonon leptopus	13	—	Frankenia salina *	5	27
Portulaca pilosa	13	—	Ambrosia dumosa	5	1
Euphorbia micromera	13	—	Sarcostemma arenarium	5	2
Condaliopsis rigida	13	—	Cryptantha maritima var. maritima	5	3
Jatropha cuneata	12	—	Stillingia linearifolia	4	1
Bursera microphylla	12	—	Atriplex leucophylla *	4	14
Chaenactis lacera	10	—	Distichlis spicata	4	24
Pachycereus pringlei	10	—	Helianthus niveus subsp. niveus	4	13
Jatropha cordata	10	—	Isocoma menziesii var. vernonioides	3	8
Castela peninsularis	10	—	Limonium californicum	3	19
Drymaria holosteoides var. crassifolia	9	—	Dudleya cultrata	2	10
Physalis glabra	9	—	Mirabilis californica	2	11
Achyronychia cooperi	8	—	Salicornia bigelovii	2	10
Encelia farinosa var. Phenocodonta	8	—	Camissonia cheiranthifolia subsp. suffruticosa	1	7
Sphaeralcea fulva	8	—	Cuscuta salina	1	19
Trianthema portulacastrum	8	—	Echinocereus maritimus	1	11
Atriplex polycarpa	7	—	Lepidium nitidum	1	4
Dyssodia anthemidifolia	7	—	Rhus integrifolia	1	15
Perityle emoryi	7	—	Ribes speciosum	1	6
Coulterella capitata	7	—	Rosa minutifolia	1	7
Dalea tinctoria var. tinctoria	7	—	Pentagramma triangularis var. viscosa	1	5
Hofmeisteria fasciculata var. fasciculata	7	—	Malosma laurina	1	8
Triteleiopsis palmeri	7	—	Isomeris arborea	1	3