Rotala indica

(Willdenow) Koehne

Bot. Jahrb. Syst. 1: 172. 1880.

Common names: Indian toothcup
Basionym: Peplis indica Willdenow Sp. Pl. 2: 244. 1799
Treatment appears in FNA Volume 10.
Revision as of 20:03, 7 June 2022 by imported>Volume Importer
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Herbs annual [perennial], ter­restrial, amphibious, or aquatic. Stems erect or decumbent, un­branched or branched. Leaves opposite, monomorphic; blade obovate to oblong or subspatulate [ovate, lanceolate, linear], 4–20 × 3–8 mm, base attenuate to obtuse, margins white-cartilaginous, especially prominent when dry. Inflorescences terminal or axillary racemes, short axillary spikes, or solitary flowers. Floral-tube 1.5–2.5 × 1–1.5 mm; epicalyx segments absent; sepal margins cartilaginous; petals persistent, 4, pink, linear to narrowly ovate, less than 1/2 length of sepals; stamens inserted about mid level in floral-tube; style slender; stigma capitate. Capsules ca. 2 × 1.5 mm, 2-valved. 2n = 32 (China, Japan).


Phenology: Flowering late spring–summer.
Habitat: Rice fields, irriga­tion ditches.
Elevation: 50–100 m.

Distribution

Introduced; Calif., La., se Asia (to Japan), also in Europe, Africa

Discussion

Rotala indica probably was introduced into the flora area as a contaminant of imported rice seed stock. It frequently occurs in rice fields together with the native R. ramosior and/or Ammannia coccinea.

Selected References

None.

Lower Taxa

None.
... more about "Rotala indica"
dehiscent +  and introrse +
Shirley A. Graham +
(Willdenow) Koehne +
attenuate +  and obtuse +
Peplis indica +
brochidodromous +
0.4 cm4 mm <br />0.004 m <br /> (2 cm20 mm <br />0.02 m <br />) +
obovate +  and oblong or subspatulate +
membranous +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
2 cm20 mm <br />0.02 m <br /> (?) +
1.5 cm15 mm <br />0.015 m <br /> (?) +
Indian toothcup +
complanate +
persistent +
obconic +, cylindrical +, urceolate +, turbinate +  and campanulate +
Calif. +, La. +, se Asia (to Japan) +, also in Europe +  and Africa +
indehiscent +, septifragal +, septicidal +, loculicidal +  and dehiscence +
2-4-horned +
50–100 m. +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
campanulate +
actinomorphic +, subsessile +  and sessile +
trichomelike +
Rice fields, irrigation ditches. +
aquatic +  and amphibious +
axillary +  and terminal +
monomorphic +
deciduous +
submerged +  and emergent +
white-cartilaginous +
cartilaginous +  and membranous +
distinct +
1 +  and 1400 +
pinnately-veined +
persistent +
distinct +
0 length of sepals +  and 1/2 length of sepals +
linear +  and narrowly ovate +
Flowering late spring–summer. +
Bot. Jahrb. Syst. +
not +  and winged +
30 +  and 100 +
convex-concave +  and obovoid-semiovoid +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
alternating +
persistent +
0 +  and 1/2 +
subulate +  and deltate +
mid +  and inserted +
creeping +  and decumbent +
submerged +  and floating +
decumbent +  and erect +
4-angled +
capitate +  and punctiform +
petiolate +, subsessile +  and sessile +
slender +
not +  and clonal +
aquatic +, amphibious +  and terrestrial +
Rotala indica +
species +
septicidal +
indurated +, leathery +  and dry +