University of Arkansas Herbarium
Biota of North America Program
Texas A&M University Bioinformatics Working Group
Arkansas Biodiversity - Vascular Plants
from An Annotated Checklist of the Vascular Plants of Arkansas (1988):

Table 2. Total taxa known by county, from best-collected to worst-collected county; tied counties are listed alphabetically.

Rank OrderArkansas CountyNumber of Taxa
1.Washington1,301
2.Pulaski1,140
3.Benton1,125
4.Franklin1,072
5.Faulkner1,044
6.Ashley1,043
7.Pope1,010
8.Jefferson971
9.Bradley964
10.Stone955
11.Garland945
12.Newton938
13.Drew925
14.Polk902
15.Logan892
16.Marion853
17.Independence831
18.Baxter828
19.Conway828
20.Carroll824
21.Hempstead818
22.Cleburne797
23.St. Francis774
24.Saline767
25.Montgomery762
26.Union752
27.Hot Spring750
28.Clark738
29.Madison736
30.Craighead709
31.Arkansas686
32.Izard682
33.Yell643
34.Johnson613
35.Howard612
36.Nevada608
37.Crawford607
38.Fulton602
39.Randolph583
40.Lawrence577
41.Sebastian564
42.Clay563
43.Sharp561
44.Boone550
45.Lincoln550
46.Little River544
47.Miller544
48.Searcy542
49.Ouachita519
50.Crittenden516
51.Lee510
52.Sevier497
53.Pike495
54.Greene488
55.Grant487
56.Perry486
57.Prairie484
58.White484
59.Poinsett482
60.Cleveland478
61.Scott478
62.Calhoun461
63.Lonoke459
64.Dallas450
65.Van Buren443
66.Columbia421
67.Desha420
68.Cross417
69.Phillips401
70.Mississippi380
71.Chicot370
72.Monroe352
73.Lafayette334
74.Woodruff298
75.Jackson275
Total49,510

Return to the Arkansas Biodiversity Homepage