Table 2. Structural characteristics of 12 vegetation types classified from forest vegetation in natural habitats of Zanthoxylum piperitum.

Vegetation types (Dominant-Indicator species)	Mean height of vegetation strata(m)				Mean DBH(cm)	Mean total percent cover(%)
Full name	T	ST	S	H	T	T	ST	S	H	All
1. Cornus controversa-Philadelphus schrenkii type	14.9	6.5	1.9	0.5	26	74	24	29	35	215
2. Zelkova serrata-Lindera erythrocarpa type	14.5	7.1	2.2	0.6	28	76	46	51	41	259
3. Quercus serrata-Carpinus tschonoskii type	15.2	7.4	2.5	0.5	27	71	43	48	31	196
4. Carpinus laxiflora-Acer pictum var. mono type	16.1	7.2	2.2	0.5	31	83	43	34	21	206
5. Pinus densiflora-Quercus mongolica type	12.2	6.6	2.1	0.5	21	82	27	47	43	205
6. Quercus variabilis-Lespedeza maximowiczii type	12.8	6.6	2.2	0.6	23	83	33	50	51	252
7. Quercus dentata-Ligustrum obtusifolium type	13.7	6.1	1.9	0.5	24	81	33	43	42	231
8. Pinus densiflora-Rhus tricocarpa type	10.1	6.4	1.9	0.4	23	77	43	57	73	242
9. Mallotus japonicus-Kadsura japonica type	12.1	5.5	1.7	0.7	30	84	30	40	60	252
10. Prunus serrulata var. pubescens-Arisaema ringens type	13.7	6.8	1.5	0.5	29	79	39	37	61	243
11. Ilex integra-Phaenosperma globosa type	9.9	5.4	2.3	0.4	24	76	38	48	51	264
12. Alnus firma-Rosa multiflora type	11.2	5.7	1.4	0.4	25	72	23	30	80	271
Total	13.2	6.5	2.0	0.5	25	80	34	45	47	236