Table 2.
Taxonomic information of floating weeds of Dera Ismail Khan District.
| S.#. | Botanical Name | Common Name | Major groups | Flowering period | V. No.* | Availability |
| 1. | Azolla pinnata | Water velvet | Pteridophyta | Produces sporocarp in winter months |
230 | Common |
| 2. |
Lemna aequinoctialis |
Duckweed | Spermatophyta (Monocotyledons) |
April – May. | 349 | Common |
| 3. | Lemna gibba | Duckweed | Spermatophyta (Monocotyledons) |
April – August | 414 | Common |
| 4. |
Marsilea quadrifoliata |
Pepperwort. water clover |
Pteridophyta | Produces Sporocarp in winter months |
65 | Common |
| 5. | Nelumbo nucifera | Lotus, sacred lotus, |
Spermatophyta (Dicotyledons) |
Sept. – Nov. | 55 | Not common |
| 6. |
Nymphoides cristata |
Crested floating heart. |
Spermatophyta (Dicotyledons) |
March – June. | 129 | Common |
| 7. | Nymphoides indica | Water snowflake |
Spermatophyta (Dicotyledons) |
August – October | 415 | Not common |
| 8. | Pistia stratiotes | Water lettuce | Spermatophyta (Monocotyledons) |
July – November | 202 | Common |
| 9. |
Potamogeton nodosus |
Indian Pondweed. |
Spermatophyta (Monocotyledons) |
April – August | 192 | Common |
| 10. |
Ricciocapus natans |
Purple-fringed riccia |
Bryophyta | Fruiting period occurs in spring |
283 | Not common |
| 11. |
Spirodela polyrrhiza |
Giant duck weed | Spermatophyta (Monocotyledons |
Sept. – Oct. | 204 | Common |
*
V.No. = Voucher Number