![](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6b/United_Kingdom_A_road_zones.svg/220px-United_Kingdom_A_road_zones.svg.png)
A roads
[edit]A roads are numbered routes in Great Britain. See the article Great Britain road numbering scheme for the rationale behind the numbers allocated.
Depending on the first digit of the road's number see:
- Zone 1 (road beginning with 1)
- Zone 2 (road beginning with 2)
- Zone 3 (road beginning with 3)
- Zone 4 (road beginning with 4)
- Zone 5 (road beginning with 5)
- Zone 6 (road beginning with 6)
- Zone 7 (road beginning with 7)
- Zone 8 (road beginning with 8)
- Zone 9 (road beginning with 9)
B roads
[edit]B roads are numbered routes in Great Britain of lesser importance than A roads. See the article Great Britain road numbering scheme for the rationale behind the numbers allocated.
Depending on the first digit of the road's number see:
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction