Flower snark
| Flower snark | |
|---|---|
 The flower snarks J3, J5 and J7. | |
| Vertices | 4n |
| Edges | 6n |
| Girth | 3 for n=3 5 for n=5 6 for n≥7 |
| Chromatic number | 3 |
| Chromatic index | 4 |
| Book thickness | 3 for n=5 3 for n=7 |
| Queue number | 2 for n=5 2 for n=7 |
| Properties | Snark for n≥5 |
| Notation | Jn with n odd |
| Table of graphs and parameters | |
| Flower snark J5 | |
|---|---|
 The flower snark J5. | |
| Vertices | 20 |
| Edges | 30 |
| Girth | 5 |
| Chromatic number | 3 |
| Chromatic index | 4 |
| Properties | Snark Hypohamiltonian |
| Table of graphs and parameters | |
In the mathematical field of graph theory, the flower snarks form an infinite family of snarks introduced by Rufus Isaacs in 1975.
As snarks, the flower snarks are connected, bridgeless cubic graphs with chromatic index equal to 4. The flower snarks are non-planar and non-Hamiltonian, though they are 1-planar. The flower snarks J5 and J7 have book thickness 3 and queue number 2.