Frequency (%)



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Appendix 2. Species recorded in vegetation of buffelgrass and non-buffelgrass patches of Saguaro National Park, Sonoran Desert.





Frequency (%)a

Relative Cover (%)




BGb

NBGb

BG

NBG

Annual graminoid













Bouteloua aristidoides

14

21

0.3

0.1

Panicum hirticaule

7

29

0.0

0.9

Perennial graminoid













Aristida purpurea

14

14

0.2

0.4

Bothriochloa barbinodis

7

0

0.0

0.0

Eragrostis echinochloidea*c

7

0

0.0

0.0

Eragrostis lehmanniana*

14

21

0.1

0.2

Muhlenbergia porteri

21

79

0.2

3.5

Pennisetum ciliare*

100

0

72.3

0.0

Poa pratensis*

0

14

0.0

0.5

Tridens muticus

0

7

0.0

0.1

Fern













Astrolepis sinuata

7

21

0.0

0.1

Pentagramma triangularis

36

29

0.2

0.3

Annual forb













Eriastrum diffusum

0

7

0.0

0.2

Ipomoea barbatisepala

7

21

0.1

0.3

Annual-perennial forb













Descurainia pinnata

43

36

0.5

1.4

Nicotiana obtusifolia

7

0

0.1

0.0

Perennial forb













Chamaesyce melanadenia

14

7

0.1

0.2

Dichelostemma capitatum

14

0

0.1

0.0

Evolvulus arizonicus

7

14

0.1

0.3

Janusia gracilis

79

71

1.8

4.1

Lomatium nevadense

7

7

0.1

0.0

Psilostrophe cooperi

0

7

0.0

0.4

Senna covesii

0

7

0.0

0.1

Sphaeralcea laxa

7

0

0.0

0.0

Thymophylla pentachaeta

7

0

0.1

0.0

Tidestromia oblongifolia

0

7

0.0

0.4

Shrub













Abutilon spp.

43

29

0.3

0.6

Aloysia wrightii

7

0

0.0

0.0

Ambrosia ambrosioides

14

14

0.1

2.2

Ayenia filiformis

7

7

0.1

0.0

Brickellia coulteri

7

14

0.1

0.4

Calliandra eriophylla

57

57

0.6

1.8

Celtis ehrenbergiana

21

14

0.5

2.2

Coursetia glandulosa

21

7

1.0

2.2

Encelia farinosa

100

100

4.4

24.7

Eriogonum fasciculatum

0

7

0.0

0.1

Fouquieria splendens

57

71

2.0

6.5

Haplophyton crooksii

29

29

0.4

0.5

Hibiscus denudatus

7

7

0.1

0.3

Hyptis emoryi

7

7

0.2

0.1

Jatropha cardiophylla

71

71

1.0

7.4

Larrea tridentata

14

0

1.0

0.0

Lycium spp.

79

71

1.7

7.6

Lysiloma watsonii

7

7

0.1

0.2

Porophyllum gracile

0

7

0.0

0.1

Tecoma stans

7

0

0.5

0.0

Trixis californica

14

7

0.1

0.1

Shrub-tree













Acacia constricta

0

7

0.0

0.4

Acacia greggii

29

29

0.1

1.4

Parkinsonia microphylla

64

57

2.9

11.2

Prosopis velutina

43

21

1.8

1.9

Cactus













Carnegiea gigantea

43

79

0.3

2.8

Cylindropuntia bigelovii

14

14

0.1

0.2

Cylindropuntia fulgida

0

7

0.0

0.1

Cylindropuntia leptocaulis

7

0

0.1

0.0

Cylindropuntia versicolor

50

57

0.4

1.4

Ferocactus wislizeni

29

43

0.2

0.8

Mammillaria grahamii

64

64

0.3

0.6

Mammillaria heyderi

7

0

0.0

0.0

Opuntia engelmannii

64

64

2.7

8.2

aOut of 14, 100-m2 plots for each patch type.

bBG, buffelgrass patch; NBG, non-buffelgrass patch.

cAsterisks denote exotic species.


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