Sagittaria brevirostra

Mackenzie & Bush

Rep. (Annual) Missouri Bot. Gard. 16:102. 1905.

Common names: Midwestern arrowhead
IllustratedEndemic
Synonyms: Sagittaria engelmanniana subsp. brevirostra (Mackenzie & Bush) Bogin
Treatment appears in FNA Volume 22.

Herbs, perennial, to 70 cm; rhizomes absent; stolons present; corms present. Leaves emersed; petiole terete-ridged, to 39 cm; blades sagittate, 5–20 × 2–8 cm, basal lobes equal to or less than remainder of blade. Inflorescences racemes or panicles, of 5–12 whorls, emersed, 25–30 × 6–15 cm; peduncles to 45 cm; bracts distinct or if connate, then less than ¼ total length, long-acuminate, 10–40 mm, firm, not papillose; fruiting pedicels spreading to ascending, cylindric, 1–2.5 cm. Flowers to 3.5 cm diam.; sepals recurved to spreading, not enclosing flower; filaments cylindric, longer than anthers, glabrous; pistillate pedicellate, without ring of sterile stamens. Fruiting heads (1.2–) 1.5–2.5 cm diam.; achenes cuneate-obovoid, without abaxial keel, 2.1–3.1 × 1.4–2.2 mm, beaked; faces ??, wings 0–2, entire, glands absent; beak lateral, ascending apically, 0.4–1.7 mm. missing datum whether faces tuberculate or not; if datum not easily available, change wording to near-original faces with 0–2 wings.


Phenology: Flowering summer (Jul–Sep).
Habitat: Slightly basic to slightly acidic to alkaline waters of ponds, lakes, and swamps
Elevation: 100–�1800 m

Distribution

V22 566-distribution-map.jpg

Sask., Ala., Ark., Calif., Colo., Ill., Ind., Iowa, Kans., Ky., La., Mich., Minn., Miss., Mo., Nebr., Ohio, Okla., S.Dak., Tex., Va., Wis.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Sagittaria brevirostra"
0.21 cm2.1 mm <br />0.0021 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
cuneate-obovoid +
1.4mm;2.2mm +
papillose +  and smooth +
Obtuse (?) +  and Acute (?) +
Robert R. Haynes +  and C. Barre Hellquist +
Mackenzie & Bush +
attenuate;hastate or sagittate +
not +  and tuberculate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
sagittate +
2cm +  and 8cm +
less than ¼ total length +
connate +  and distinct +
spreading;ascending +
not papillose +
cylindric +  and long-acuminate +
Midwestern arrowhead +
Sask. +, Ala. +, Ark. +, Calif. +, Colo. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, Ohio +, Okla. +, S.Dak. +, Tex. +, Va. +  and Wis. +
100–�1800 m +
u--shaped +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
cylindric +
pistillate +, staminate +, sessile +  and pedicellate +
0 cm0 mm <br />0 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
hypogynous +
not +, keeled +  and compressed +
Slightly basic to slightly acidic to alkaline waters of ponds, lakes, and swamps +
decumbent +  and floating +
petiolate +  and sessile +
decumbent +  and floating +
25cm;30cm +
6 cm60 mm <br />0.06 m <br /> (15 cm150 mm <br />0.15 m <br />) +
ascending +  and recurved +
0 cm0 mm <br />0 m <br /> (45 cm450 mm <br />0.45 m <br />) +
deciduous +
terete-ridged +
0 cm0 mm <br />0 m <br /> (39 cm390 mm <br />0.39 m <br />) +
Flowering summer (Jul–Sep). +
not radiating +  and arranged +
Rep. (Annual) Missouri Bot. Gard. +
decumbent +  and floating +
25cm;30cm +
6cm;15cm +
persistent +
recurved;spreading +
sculptured +
herbaceous;leathery +
Illustrated +  and Endemic +
Sagittaria engelmanniana subsp. brevirostra +
Sagittaria brevirostra +
Sagittaria +
species +
white;brown +
emersed +  and submersed +
glabrous +  and sparsely pubescent +
bracteolate +  and branching +