H. vulgaris
# H. vulgaris

H. vulgaris may refer to:

* Hippuris vulgaris, the common mare's tail, a common aquatic plant species found in Eurasia
* Hydra vulgaris, a small freshwater hydroid species
* Hydrocotyle vulgaris, the marsh pennywort, a small creeping perennial herb species native to North Africa, Europe, Florida and west to the Caspian region
