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Scorpidium scorpioides
The large, turgid plants and blunt falcate-secund leaves that lack a costa are key features. All Drepanocladus (sensu lato) species have a strong single costa as do both S. cossonii and S. revolvens.
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L to R: whole leaf, alar cells, cells, apex |
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| Habit | Large, turgid, black to reddish-green plants floating in water or growing upright is loose carpets. Mostly with a few irregular branches. |
| Stems | naked, without a hyalodermis. |
| Leaves | ovate-lanceolate to ovate, broadly acute to narrowly obtuse, falcate-secund, rather short and blunt overall, costa short and double, margins entire. |
| Leaf Cells | elongate to linear, with blunt ends, smooth. |
| Alar Cells | consisting of a few enlarged and hyaline cells at the insertion. |
| Habitat | Floating in pools of water, emergent from water, or forming dense coarse carpets at the edges of pools. |
| Common Associates | Often intermingled with S. scorpioides is Pseudocalliergon trifarium and Meesia triquetra. Scorpidium scorpioides grows in the wettest areas of extreme-rich fens, with Scorpidium cossonii and S. revolvens occurring is somewhat drier habitats. |
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