Sagittaria guayanensis subsp. guayanensis

Treatment appears in FNA Volume 22.

Herbs, annual or perennial, to 50 cm; rhizomes absent; stolons absent; corms present. Leaves submersed, phyllodial, flattened, 4–7 × 0.4–0.8 cm, or floating; petiole triangular, to 42 cm; blade sagittate, 3.5–10.5 × 1.5–8.5 cm, basal lobes shorter than to equal to length of remainder of blade. Inflorescences racemes, of 1–7 whorls, floating, 0.9–9 × 0.6–4 cm; peduncles 10.9–22 cm; bracts distinct or connate less than ¼ total length, broadly lanceolate to linear-lanceolate, 2.8–15 mm, delicate, not papillose; fruiting pedicels spreading to recurved, cylindric, 0.6–2.1 cm. Flowers 1.2–2 cm diam.; sepals spreading in staminate, erect in pistillate, enclosing flower or fruiting head; filaments cylindric, equaling anther length, glabrous; pistillate pedicellate, with ring of sterile stamens. Fruiting heads 0.5–1.8 cm diam.; achenes oblanceoloid, abaxially keeled, 1.7–2.2 × 1.2–1.5 mm, beaked; faces tuberculate, wings 1–3, dentate, glands absent; beak lateral, erect, 0.2–0.5 mm.


Phenology: Flowering summer–fall.
Habitat: Rice fields, ephemeral pools, roadside ditches, and streams
Elevation: 0–100 m

Distribution

V22 444-distribution-map.jpg

Introduced; La., c, s Mexico, West Indies, Central America, tropical South America

Discussion

Selected References

None.

Lower Taxa

None.

"glabrous" is not a number.

0.17 cm1.7 mm <br />0.0017 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
keeled;oblanceoloid +
1.2mm;1.5mm +
0.5cm;1.8cm +
papillose +  and smooth +
Obtuse (?) +  and Acute (?) +
Robert R. Haynes +  and C. Barre Hellquist +
Kunth in A. von Humboldt et al. +
attenuate;hastate or sagittate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (10.5 cm105 mm <br />0.105 m <br />) +
sagittate +
1.5cm +  and 8.5cm +
less than ¼ total length +
connate +  and distinct +
spreading;recurved +
not papillose +
cylindric +, broadly lanceolate +  and linear-lanceolate +
La. +, c +, s Mexico +, West Indies +, Central America +  and tropical South America +
0–100 m +
u--shaped +
tuberculate +
glabrous +  and pubescent +
cylindric +
pistillate +, staminate +, sessile +  and pedicellate +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
hypogynous +
not +, keeled +  and compressed +
Rice fields, ephemeral pools, roadside ditches, and streams +
decumbent +  and floating +
0.9 cm9 mm <br />0.009 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (4 cm40 mm <br />0.04 m <br />) +
petiolate +  and sessile +
4cm;7cm +
flattened +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
decumbent +  and floating +
submersed +, floating +  and emersed +
ascending +  and recurved +
10.9 cm109 mm <br />0.109 m <br /> (22 cm220 mm <br />0.22 m <br />) +
deciduous +
triangular +
0 cm0 mm <br />0 m <br /> (42 cm420 mm <br />0.42 m <br />) +
Flowering summer–fall. +
not radiating +  and arranged +
in A. von Humboldt et al.,Nov. Gen. Sp. +
decumbent +  and floating +
persistent +
erect;spreading +
sculptured +
herbaceous;leathery +
Introduced +
Lophotocarpus +
Sagittaria guayanensis subsp. guayanensis +
Sagittaria guayanensis +
subspecies +
white;brown +
perennial +  and annual +
emersed +  and submersed +
glabrous +  and sparsely pubescent +
bracteolate +  and branching +