Table 2. Summary of the number of species with seed collected from cars, weed status globally, in Europe, Australia, North America, China, India and South Africa, their life forms and growth forms.

Category	Number of species
Total species	626
Weed status globally
Weed	599
Environmental weed	101
100 world's worst invasive	4
Weed status in Europe
Declared weed species	439
150 most widely naturalized species	55
Invasive in Europe	63
EPPO list of invasive species	3
Declared weed in Czech Republic	191
Invasive in Czech Republic	18
Weed status in North America
Listed as invasive or on a Noxious weed in North America	248
Declared noxious in the United States	14
Weed status in Australia
Naturalized	370
Declared invasive	21
Weeds of National significance	9
Declared noxious	64
Weed status in India
Declared weed	167
Declared invasive	56
Declared invasive in China	77
Declared invasive in South Africa	23
Growth form
Graminoids	202
Forbs	360
Tree	31
Shrubs	33
Life span
Annual	238
Annual/biennial	36
Annual/perennial	50
Biennial	7
Biennial/perennial	6
Perennial	289

Note: Weed status was according to Randall [48]. Environmental weed was according to Weber (2003). among 100 world's worst invasive according to Lowe et al. [51] Weed in some part of Europe [52]; Invasive in Europe according to The European Network on Invasive Alien Species [55], In vasive according to European and Mediterranean Plant Protection Organization (EPPO) invasive plant species list [56], among 150 most widespread alien species in Europe [54] and status in Czech Republic [57]. Invasive/noxious in North America was according to Invasive.org [59]. Naturalize in Australia [11]. Noxious or a weed of national significance was according to The Australian Weeds Committee [44,58]. Weed status in India [61], in China [62] and in South Africa [63].