Sagittaria australis

(J. G. Smith) Small

Flora of the Southeastern United States 45. 1903.

Common names: Appalachian arrowhead
Endemic
Basionym: Sagittaria longirostra var. australis J. G. Smith Bull. Torrey Bot. Club 24: 20. 1897
Synonyms: Sagittaria engelmanniana subsp. longirostra (Micheli) Bogin
Treatment appears in FNA Volume 22.

Herbs, perennial, to 130 cm; rhizomes absent; stolons present; corms present. Leaves emersed; petiole 5-winged, 19–85 cm; blade sagittate, 3–19 × 2.5–11 cm, basal lobes equal to remainder of blade. Inflorescences racemes, of 5–12 whorls, emersed, 10–29 × 3–5 cm; peduncles 25–105 cm; bracts distinct or if connate, then less than ¼ total length, lanceolate, 7–30 mm, papery, not papillose; fruiting pedicels spreading to ascending, cylindric, 0.3–2.3 cm. Flowers to 3 cm diam.; sepals recurved to spreading, not enclosing flower or fruiting head; filaments cylindric, longer than anthers, glabrous; pistillate pedicellate, without ring of sterile stamens. Fruiting heads 1–2.2 cm diam.; achenes obovoid, without abaxial keel, 2.1–3.2 × 1.4–2.3 mm, beaked; faces not tuberculate, wings 0–2, entire, glands absent; beak lateral, strongly recurved, 4–17 mm. 2n = 22.


Phenology: Flowering summer–early fall (Jul–Oct).
Habitat: Slightly basic to slightly acidic ponds, lakes, and swamps
Elevation: 1–300 m

Distribution

V22 141-distribution-map.jpg

Ala., Ark., Fla., Ga., Ill., Ind., Iowa, Ky., La., Md., Miss., Mo., N.J., N.Y., N.C., Ohio, Pa., S.C., Tenn., Va., W.Va.

Discussion

The name Sagittaria longirostra (Micheli) J. G. Smith has been misapplied to S. australis (J. G. Smith) Small (E. O. Beal et al. 1980).

Lower Taxa

None.
... more about "Sagittaria australis"
0.21 cm2.1 mm <br />0.0021 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
1.4mm;2.3mm +
papillose +  and smooth +
Obtuse (?) +  and Acute (?) +
Robert R. Haynes +  and C. Barre Hellquist +
(J. G. Smith) Small +
attenuate;hastate or sagittate +
Sagittaria longirostra var. australis +
0.4 cm4 mm <br />0.004 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
3 cm30 mm <br />0.03 m <br /> (19 cm190 mm <br />0.19 m <br />) +
sagittate +
2.5cm +  and 11cm +
less than ¼ total length +
connate +  and distinct +
spreading;ascending +
not papillose +
cylindric +  and lanceolate +
Appalachian arrowhead +
Ala. +, Ark. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, La. +, Md. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, S.C. +, Tenn. +, Va. +  and W.Va. +
1–300 m +
u--shaped +
not tuberculate +
1 cm10 mm <br />0.01 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
cylindric +
pistillate +, staminate +, sessile +  and pedicellate +
0 cm0 mm <br />0 m <br /> (3 cm30 mm <br />0.03 m <br />) +
hypogynous +
not +, keeled +  and compressed +
Slightly basic to slightly acidic ponds, lakes, and swamps +
decumbent +  and floating +
10 cm100 mm <br />0.1 m <br /> (29 cm290 mm <br />0.29 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
petiolate +  and sessile +
decumbent +  and floating +
submersed +, floating +  and emersed +
ascending +  and recurved +
25 cm250 mm <br />0.25 m <br /> (105 cm1,050 mm <br />1.05 m <br />) +
deciduous +
terete +  and triangular +
19 cm190 mm <br />0.19 m <br /> (85 cm850 mm <br />0.85 m <br />) +
Flowering summer–early fall (Jul–Oct). +
not radiating +  and arranged +
Flora of the Southeastern United States +
decumbent +  and floating +
beal1980a +
persistent +
recurved;spreading +
sculptured +
herbaceous;leathery +
Sagittaria engelmanniana subsp. longirostra +
Sagittaria australis +
Sagittaria +
species +
white;brown +
emersed +  and submersed +
glabrous +  and sparsely pubescent +
bracteolate +  and branching +