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Spiranthes cernua

Species category

Flower

Common name

nodding lady's tresses, white nodding ladies' tresses, common ladies' tresses

Diagnostic characters

Planting unit

True seedTrue seed:
A mature fertilized ovule consisting of an embryo, with or without and external food reserve (e.g., endosperm) enclosed by the testa.

Shape

Irregularly oblanceolate

Size

  • Length 0.2–0.6 mm
  • Width 0.1–0.2 mm
  • Thickness 0.1–0.2 mm

Color

Brown

Texture

Rough

Other structures

The outer tissue is longer than the embryoEmbryo:
A rudimentary plant contained in a seed, usually consisting of a more or less differentiated axis and attached cotyledon(s).
.

Identification notes

The oversized outer tissue is transparent at the distal ends.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Orchidaceae

Valid name

Spiranthes cernua (L.) Rich.

Synonyms

SIbidium cernuum (L.) House
Spiranthes cernua (L.) Rich. var. incurva Jennings

Spiranthes cernua. True seeds with an oversized transparent outer tissue at the distal end.
Spiranthes cernua. True seeds with an oversized transparent outer tissue at the distal end.
Spiranthes cernua. True seeds with an oversized transparent outer tissue at the distal end.
Spiranthes cernua. True seeds with an oversized transparent outer tissue at the distal end.