Table 2.

Mean composition of alpha-pinene, camphene, eucalyptol and camphor (all in %) from six species and corresponding accessions. Blank cells indicate the constituents were not obtained from these accessions. A. tridentata va = A. tridentata Nutt. var. vaseyana; A. tridentata tr = A. tridentata Nutt. var. tridentata; A. tridentata wy = A. tridentata Nutt. var. wyomingensis.

Species	Accession	Alpha-Pinene	Camphene	Eucalyptol	Camphor
A. tridentata va	201	3.8 def	8.5 de	1.1 i	31.9 bcde
A. tridentata va	202	1.9 ef	6.7 e	2.4 i	27.3 de
A. tridentata va	203	0.9 f	0.1 g	0.8 i	0.3 h
A. tridentata va	204	2.9 def
A. tridentata va	207	1.6 ef	8.4 de	14.8 e	29.3 cde
A. tridentata va	209	29.0 b	2.9 fg	12.3 g	1.8 gh
A. tridentata va	210	35.5 a	2.2 g	12.8 fg	0.6 h
A. tridentata va	211	5.3 d	13.8 b	17.9 d	44.8 a
A. tridentata va	212	5.6 d	13.6 bc	14.1 ef	45.4 a
A. tridentata va	214	1.3 ef	6.5 e	9.7 h	13.5 fg
A. tridentata va	215	23.5 c	2.1 g	2.5 i	3.2 gh
A. tridentata tr	221	3.2 def	10.5 cd	13.6 efg	43.2 ab
A. tridentata tr	222	4.3 de	21.5 a	21.2 c	41.3 ab
A. tridentata wy	223	1.1 ef	6.6 e	12.5 fg	21.6 ef
A. tridentata wy	216	2.8 def	5.8 ef	30.8 a	24.2 def
A. longifolia	217	2.8 def	7.0 e	24.6 b	27.7 de
A. longifolia	218	3.2 def	6.9 e	25.5 b	43.4 ab
A. longifolia	219	2.7 def	7.4 de	15.3 e	35.2 abcd
A. cana	220	3.2 def	6.6 e	20.5 c	40.6 abc
A. cana	213	1.9 ef	13.3 bc	17.9 d	46.2 a

Within each column, means followed by the same letter are not significantly different at the 5% level using Tukey’s method.