Halophila johnsonii
Aquatic Botany 9: 16, fig. 1. 1980.
EndemicConservation concern
Treatment appears in FNA Volume 22.
Rhizomes with 2 scales at each node. Erect stems absent. Leaves apparently attached to rhizome, 5–25 × 1–4 mm; blade linear-lanceolate, base cuneate, margins entire, glabrous, apex round to round-acute. Inflorescences: spathe 2-leaved, enclosing pistillate flowers. Flowers unisexual, staminate and pistillate on different plants; staminate flowers unknown; pistillate flowers sessile, ca. 5 mm. Fruits ovoid. Seeds not seen.
Phenology: Flowering spring–summer.
Habitat: Sandy substrates of marine waters
Elevation: -2–0 m
Discussion
Selected References
Lower Taxa
None.
... more about "Halophila johnsonii"
linear;fusiform +
erect +
cuneate +
uniform +
abaxial +
linear-lanceolate +
opposite +
2-fid +
leaf-bearing +
arising +
moniliform +
Fla. +
distinct +
unisexual +
5 cm50 mm <br />0.05 m <br /> (?) +
not echinate +
berrylike +
dehiscing +
ovoid +
axillary +
attached +
emergent +
basal +
glabrous +
2-6[-16]-carpellate +
parietal +
inferior +
absent +
0;1 +
free +
epigynous +
differentiated +
absent +
submersed +
spheric +
Aquatic Botany +
1980 +
absent +
opposite +
bisexual +
echinate +
glabrous +
papillose +
echinate;reticulate +
many +
tubular +
2-leaved +
(0-)2-many +
creeping +
erect +
absent +
evident +
elongate +
absent +
submersed +
absent +
3;5 +
not 2-fid +
Halophila johnsonii +
Halophila +
species +
submersed +
absent +
submersed +