Najas guadalupensis subsp. floridana

(R. R. Haynes & Wentz) R. R. Haynes & Hellquist

Novon 6: 371. 1996.

WeedyEndemic
Basionym: Najas guadalupensis var. floridana R. R. Haynes & Wentz Sida 5: 262. 1974
Treatment appears in FNA Volume 22.

Stems 7–51 cm × 0.1–1.7 mm. Leaves 0.9–3.3 cm; sheath 1.2–2.5 mm wide, apex rounded; blade 0.5–2.1 mm wide, teeth 18–42 per side, visible to unaided eye, apex round obtuse to acuminate. Flowers 1 per axil. Staminate flowers 1.5–2.4 mm; anthers 1-loculed. Pistillate flowers 1–3.4 mm. Seeds 1.6–2.2 × 0.3–0.8 mm; aeroleareoles of testa in 20 longitudinal rows. 2n = 48.


Phenology: Flowering spring–fall.
Habitat: Lakes, streams, and canals
Elevation: 0–100 m

Discussion

Selected References

None.

Lower Taxa

None.

"elongating" is not a number.

0.1 cm1 mm <br />0.001 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
obtuse +  and acuminate +
Robert R. Haynes +
(R. R. Haynes & Wentz) R. R. Haynes & Hellquist +
Najas guadalupensis var. floridana +
involucral +
4-lobed +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
armed +  and 1-veined +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
sharp-tipped +
short-pedunculate +  and sessile +
Ala. +, Fla. +  and Ga. +
0–100 m +
pistillate +  and staminate +
0.1 cm1 mm <br />0.001 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
Lakes, streams, and canals +
0.1 cm1 mm <br />0.001 m <br /> (9 cm90 mm <br />0.09 m <br />) +
light green +  and brown +
red-purple +  and purple +
whorled +, appearing +  and opposite +
submersed +
0.9 cm9 mm <br />0.009 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
serrate to minutely +
Flowering spring–fall. +
not stipitate +
longer than broad +
4-6-angled +  and not ladderlike +
auriculate +  and not auriculate +
yellowish white with purple tinge +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
not recurved +
fusiform +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
not persisting +
variously--shaped +
1.2mm;2.5mm +
Weedy +  and Endemic +
7 cm70 mm <br />0.07 m <br /> (51 cm510 mm <br />0.51 m <br />) +
slender +
0.1mm;1.7mm +
2-4-branched +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Najas guadalupensis subsp. floridana +
Najas guadalupensis +
subspecies +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
caulescent +  and not rhizomatous +
perennial +  and annual +