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Table 1 List of shrub species, including frequency, mean cover, and height surveyed in 21 mature knobcone pine stands. Frequency is the percentage of plots in which the species was found. Cover is the mean percent cover of the species in plots in which it was found. SE is one standard error of the mean.

From: Age and Structure of Mature Knobcone Pine Forests in the Northern California Coast Range, USA

Species

Frequency (%)

Cover (%)

Cover SE

Height (m)

Height SE

Adenostoma fasciculatum Hook. & Arn.

47.6

3.6

2.5

1.3

0.3

Aesculus californica (Spach) Nutt.

4.8

25.0

-

1.3

-

Arbutus menziesii Pursh

57.1

2.7

2.7

1.8

1.2

Arctostaphylos canescens Eastw.

28.6

10.6

11.8

2.0

0.5

A. glandulosa ssp. glandulosa Eastw.

95.2

11.3

1.6

2.0

0.3

A. standfordiana ssp. standfordiana Parry

33.3

3.0

1.2

1.7

0.7

Ceanothus integerrimus Hook. & Arn.

9.5

2.5

-

1.7

0.4

Chrysolepis chrysophylla var. minor (Benth.) Munz

9.5

18.1

13.8

2.5

1.0

Garrya fremontii Torr.

14.3

2.5

-

1.4

0.5

Heteromeles arbutifolia (Lindl.) M. Roem.

38.1

3.5

3.0

1.4

1.0

Pickeringia montana Nutt. ex Torr. & A Gray

38.1

2.5

-

1.5

0.6

Quercus berberidifolia Liebm.

81.0

21.3

18.7

1.8

0.6

Q. chrysolepis Liebm.

61.9

12.9

12.0

4.2

1.7

Q. durata Jeps.

33.3

4.9

4.7

1.3

0.4

Q. kelloggii Newberry

23.8

3.0

1.1

2.6

2.0

Q. wislizeni A. DC. var. frutescens Engelm.

100.0

43.7

13.3

2.6

0.4

Rhamnus californica Eschsch.

42.9

3.6

3.3

1.4

1.0

Torreya californica Torr.

76.2

5.0

4.0

2.2

1.2

Umbellularia californica (Hook. & Arn.) Nutt.

71.4

3.6

1.6

2.6

1.4