Najas guadalupensis subsp. olivacea

(Rosendahl & Butters) R. R. Haynes & Hellquist

Novon 6: 371. 1996.

WeedyEndemic
Basionym: Najas olivacea Rhodora 37: 347. 1935
Treatment appears in FNA Volume 22.

Stems 15–40 cm × 1–2 mm. Leaves 0.9–1.8 cm; sheath 2.5–3.4 mm wide, apex rounded to truncate; blade 1.5–2 mm wide, teeth 20–40 per side, invisible to unaided eye, apex acute. Flowers 1 per axil. Staminate flowers 2.3–2.8 mm; anther 4-loculed. Pistillate flowers 2.7–3.1 mm. Seeds 2.3–2.5 × 0.6–0.8 mm; aeroleareoles of testa in 20–40 longitudinal rows. Chromosome number unknown not available.


Phenology: Flowering late summer.
Habitat: Lakes and rivers
Elevation: 0–100 m

Distribution

V22 28-distribution-map.jpg

Man., Ont., Que., Ind., Iowa, Mass., Mass., Mich., Minn., N.Y., Wis.

Discussion

Selected References

None.

Lower Taxa

None.

"elongating" is not a number.

60 +, 54 +, 48 +, 42 +, 36 +  and 12 +
0.1 cm1 mm <br />0.001 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
acute +, rounded +  and truncate +
Robert R. Haynes +
(Rosendahl & Butters) R. R. Haynes & Hellquist +
Najas olivacea +
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 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
sharp-tipped +
short-pedunculate +  and sessile +
Man. +, Ont. +, Que. +, Ind. +, Iowa +, Mass. +, Mich. +, Minn. +, N.Y. +  and Wis. +
0–100 m +
pistillate +  and staminate +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
Lakes and rivers +
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 /> (1.8 cm18 mm <br />0.018 m <br />) +
serrate to minutely +
Flowering late summer. +
not stipitate +
longer than broad +
20 +  and 40 +
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 +
2.5mm;3.4mm +
Weedy +  and Endemic +
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
slender +
1mm;2mm +
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. olivacea +
Najas guadalupensis +
subspecies +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
caulescent +  and not rhizomatous +
perennial +  and annual +