Echinodorus tenellus
Content
- <<<Flowers>Petals>Claws>Length
- <<<Flowers>Stamens>Anthers>Length
- <<<Flowers>Stamens>Apex>Shape
- <<<Flowers>Stamens>Filaments>Length
- <<<Inflorescences>Bracts>Apex>Shape
- <<<Leaves>Emerged leaves>Apex>Shape
- <<<Leaves>Emerged leaves>Basal sheaths>Length
- <<<Leaves>Emerged leaves>Blade>Dimensions
- <<<Leaves>Emerged leaves>Blade>Shape
- <<<Leaves>Emerged leaves>Margins>Margin type
- <<<Leaves>Emerged leaves>Petiole>Dimensions
- <<<Leaves>Emerged leaves>Veins>Vein number
- <<<Leaves>Submerged leaves>Apex>Shape
- <<<Leaves>Submerged leaves>Margins>Margin type
- <<<Leaves>Submerged leaves>Veins>Vein number
- <<Flowers>Carpels>Carpel number
- <<Flowers>Petals>Claws
- <<Flowers>Petals>Dimensions
- <<Flowers>Sepals>Length
- <<Flowers>Sepals>Vein number
- <<Flowers>Stamens>Anthers
- <<Flowers>Stamens>Apex
- <<Flowers>Stamens>Filaments
- <<Flowers>Stamens>Stamen number
- <<Fruits>Beak>Growth form
- <<Fruits>Beak>Length
- <<Fruits>Beak>Position
- <<Inflorescences>Bracts>Apex
- <<Inflorescences>Bracts>Dimensions
- <<Inflorescences>Bracts>Shape
- <<Inflorescences>Pedicels>Dimensions
- <<Inflorescences>Pedicels>Growth form
- <<Inflorescences>Peduncle>Dimensions
- <<Leaves>Emerged leaves>Apex
- <<Leaves>Emerged leaves>Basal lobes
- <<Leaves>Emerged leaves>Basal sheaths
- <<Leaves>Emerged leaves>Base
- <<Leaves>Emerged leaves>Blade
- <<Leaves>Emerged leaves>Colour
- <<Leaves>Emerged leaves>Margins
- <<Leaves>Emerged leaves>Pellucid markings
- <<Leaves>Emerged leaves>Petiole
- <<Leaves>Emerged leaves>Veins
- <<Leaves>Submerged leaves>Apex
- <<Leaves>Submerged leaves>Base
- <<Leaves>Submerged leaves>Colour
- <<Leaves>Submerged leaves>Dimensions
- <<Leaves>Submerged leaves>Margins
- <<Leaves>Submerged leaves>Pellucid markings
- <<Leaves>Submerged leaves>Shape
- <<Leaves>Submerged leaves>Veins
- <Flowers>Carpels
- <Flowers>Petals
- <Flowers>Sepals
- <Flowers>Stamens
- <Flowers>Width
- <Fruits>Beak
- <Fruits>Dimensions
- <Fruits>Rib number
- <Fruits>Shape
- <Habit>Hairs
- <Habit>Height
- <Habit>Rhizome
- <Habit>Stolons
- <Inflorescences>Bracts
- <Inflorescences>Dimensions
- <Inflorescences>Flower number
- <Inflorescences>Growth form
- <Inflorescences>Pedicels
- <Inflorescences>Peduncle
- <Inflorescences>Rachises
- <Inflorescences>Whorl number
- <Leaves>Emerged leaves
- <Leaves>Submerged leaves
- Citation
- Description
- Distribution
- Flowers
- Fruits
- Habit
- Individuals Association
- Inflorescences
- Leaves
- Phenology
- Uses
<Flowers>Sepals
sepals in flower and fruit slightly appressed, , with veins, not papillose;54
54. 004-002
<Inflorescences>Bracts
bracts shorter than pedicel subtended, united, connate half of length, coarse, , , delicate,65
65. 003-007
Description
Herb, annual, glabrous, to 25 cm tall; rhizome absent; stolon present. Leaves submersed, or emerged; emerged leaves pale green to green-brown, petiole terete, 1.2-9.5 x 0.04-0.08 cm, basal sheath 1 cm long, blade linear, 1-7.4 x 0.2-0.5 cm, margin entire, apex acute, base attenuate, basal lobes absent, veins 3-5, pellucid markings absent; submersed leaves pale green, sessile, blade linear, to 5 x ca. 0.2 cm, margin entire, apex acute, base tapering, veins 1-3, pellucid markings absent. Inflorescence umbelliform or rarely racemose, erect, with 1 or 2 whorls, overtopping leaves, not vegetatively proliferating, to 6 x to 8 cm; whorls with 4-6 flowers; peduncle terete, not winged, 12-40 x 0.1-0.2 mm; rachis, if present, between whorls terete, not winged; bracts shorter than pedicel subtended, united, connate half of length, coarse, deltoid, 2.8-4.9 x 1-2.1 mm, delicate, apex acute, not dilated basally; pedicels in flower and fruit spreading, cylindrical, 0.5-3 x 0.03-0.05 cm. Flowers 0.6-0.8 cm wide; sepals in flower and fruit slightly appressed, 2.5-2.9 mm, with 3-5 veins, not papillose; petals clawed, 2.5-4.1 x 1.5-3 mm, claw ca. 1 mm long; stamens 9, filaments ca. 0.5 mm long, anthers basifixed, ca. 1 mm long, apex obtuse; carpels 15-20. Fruit flattened, obovate, 0.8-1.5 x 0.8-1 mm, 0-3-ribbed, without keel, eglandular, beak lateral, erect, 0.1-0.2 mm long.
Distribution
Guyana present, S Brazil present, northeastern U.S.A present
from northeastern U.S.A. to S Brazil; over 70 collections examined, including 4 from Guyana (GU: 4).
Individuals Association
Guyana, savanna near Dadanawa Ranch, Görts-van Rijn et al. 242
Guyana, Upper Takutu-Upper Essequibo, N of Karanambo, Horn & Wiersema 11083
Guyana, Dadanawa, Jansen-Jacobs et al. 3214
Guyana, Rupununi, Farne Pan Lake near Pirara, Graham 389
Inflorescences
Inflorescence umbelliform or rarely racemose, , with whorls, overtopping leaves, not vegetatively proliferating, ;78
78. 003