Marsilea mollis

B. L. Robinson & Fernald

Proc. Amer. Acad. Arts 30: 123. 1895.

Illustrated
Treatment appears in FNA Volume 2.

Plants forming dense clones. Roots arising at nodes. Petioles 1–14 cm, sparsely erect-pilose to glabrous. Pinnae 2–17 × 1–16 mm, densely pilose abaxially, sparsely pilose adaxially. Sporocarp stalks erect, unbranched, attached at base of petiole, or rarely up to 3.8 mm above it, not hooked at apex, 1.7–6.7 mm. Sporocarps nodding or perpendicular, 2.4–5 × 2–3 mm, 1.3–1.7 mm thick, ovate in lateral view, covered with needlelike hairs with spreading tips when young but soon glabrate; raphe 0.6–1.4 mm, proximal tooth 0.2 mm, blunt, or absent, distal tooth 0.2 mm or absent. Sori 10–14.


Phenology: Sporocarps produced spring–fall (May–Oct).
Habitat: On mud and in shallow water, in ponds and marshes
Elevation: 1300–2000 m

Distribution

V2 37-distribution-map.gif

Ariz., Tex., Mexico, South America

Discussion

The name Marsilea mexicana A. Braun has sometimes been misapplied to this species.

The red or brown streaks on the pinnae, reported as characteristic of Marsilea mollis by a number of authors, are found on floating leaves of nearly all species in the genus (D. M. Johnson 1986).

Selected References

None.

Lower Taxa

None.
... more about "Marsilea mollis"
David M. Johnson +
B. L. Robinson & Fernald +
divided +
expanded +
pea--shaped +
dense +  and diffuse +
0.2 cm2 mm <br />0.002 m <br /> (?) +
Ariz. +, Tex. +, Mexico +  and South America +
1300–2000 m +
On mud and in shallow water, in ponds and marshes +
multicellular +
heteromorphic +
deciduous +
filiform +
larger +
subterranean +
sparsely erect-pilose;glabrous +
1 cm10 mm <br />0.01 m <br /> (14 cm140 mm <br />0.14 m <br />) +
Sporocarps produced spring–fall (May–Oct). +
0.2 cm2 mm <br />0.002 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
pilose;pilose +
0.1 cm1 mm <br />0.001 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
Proc. Amer. Acad. Arts +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
Illustrated +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.67 cm6.7 mm <br />0.0067 m <br />) +
1.3mm +  and 1.7mm +
unbranched +  and branched +
brown +, red +  and numerous +
Marsilea mollis +
Marsilea +
species +
protruding +
amphibious +  and aquatic +