Contains 7 accepted taxa overall.
Characteristics
Classification
Citation
HYDROCOTYLE Linnaeus, Sp. Pl. 234. 1753.
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TYPE: Hydrocotyle vulgaris Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 2: 648. 1913.
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Hydrocotyle bonariensis | LARGELEAF MARSHPENNYWORT | Native FACW (NWPL) FACW (DEP) | ||
| Hydrocotyle bowlesioides | LARGELEAF MARSHPENNYWORT | Not Native FAC (NWPL) | ||
| Hydrocotyle ranunculoides | FLOATING MARSHPENNYWORT | Native OBL (NWPL) OBL (DEP) | ||
| Hydrocotyle sibthorpioides | LAWN MARSHPENNYWORT | Not Native FACW (DEP) | ||
| Hydrocotyle umbellata | MANYFLOWER MARSHPENNYWORT | Native OBL (NWPL) OD (WAP) FACW (DEP) | ||
| Hydrocotyle verticillata var. triradiata | WHORLED MARSHPENNYWORT | Native OBL (NWPL) FACW (DEP) | ||
| Hydrocotyle verticillata var. verticillata | WHORLED MARSHPENNYWORT | Native OBL (NWPL) FACW (DEP) |
Identification Key
1. Leaf blade peltate or not, with a distinct sinus, often extending to the petiole or nearly so, most blades with at least one sinus >½ of the blade width or length
2
1. Leaf blade peltate, nearly rotund lacking a sinus or the sinus <¼ of the blade width or length
4
2. Leaves hairy
2. Leaves glabrous
3
3. Stems and petioles mostly 2-4 mm wide; leaves to 8 cm long or wide
3. Stems and petioles 0.5-1.5 mm wide; leaves to 1.5 cm long or wide
4. Inflorescence a simple or compound umbel
5
4. Inflorescence a spike or raceme
6
5. Infloresnce a compound umbel
5. Inflorescenee a simple umbel, very rarely if ever compound
6. Flower or fruit with a pedicel up to 10 mm long
6. Flower or fruit sessile to subsessile, the pedicel <1 mm long
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| Dominia | Dominia Fedde, Repert. Spec. Nov. Regni Veg. 26: 272. 1929. | TYPE: Dominia acroptera (Domin) Fedde (Maidenia acroptera Domin) Substitute name for Maidenia Domin 1922, non Rendle 1916. | |
| Homalosciadium | Homalosciadium Domin, Beih. Bot. Centralbl. 23(2): 294. 1908. | TYPE: Homalosciadium verticillatum Domin (Hydrocotyle verticillata Turczinanow 1849, non Thunberg 1798) | |
| Maidenia | Maidenia Domin, Acta Bot. Bohem. 1: 41. 1922, non Rendle 1916. | TYPE: Maidenia acroptera Domin = Dominia Fedde 1929. | |
| Neosciadium | Neosciadium Domin, Beih. Bot. Centralbl. 23(2): 291. 1908. | TYPE: Neosciadium glochidiatum (Bentham) Domin (Hydrocotyle glochidiata Bentham) | |
| Uldinia | Uldinia J. M. Black, Trans. & Proc. Roy. Soc. South Australia 46: 568, t. 37(2). 1922. | TYPE: Uldinia mercurialis J. M. Black |