Ampurdán Water Blinks (Montia fontana subsp. amporitana)

Intermediate blinks Haller's blinks Water blinks

Montia fontana subsp. amporitana (Intermediate Blinks): Guide

Montia fontana subsp. amporitana is a low, cushion-forming wetland herb that colonizes ruts, spring heads, and seasonally flooded sandy tracks across Europe and the Mediterranean basin. Its subspecific epithet amporitana refers to the historical region of Empordà (ancient Emporiae) in Catalonia, Spain, where the botanist Frère Sennen studied the plant.

First described by Sennen in 1911 and elevated to its current subspecific rank within Montia fontana by Stanley M. Walters in 1953, this taxon is also frequently recorded in European floras under the synonym Montia fontana subsp. intermedia. It occupies an ecological and morphological middle ground within the water blinks species complex.

Taxonomy

  • ∟ царство Plantae
  • ∟ division Tracheophytes (Vascular Plants)
  • ∟ subdivision Spermatophytes (Seed plants)
  • ∟ Angiosperms
  • ∟ mesangiosperms (Core angiosperms)
  • ∟ eudicots
  • ∟ core eudicots
  • ∟ Superasterids
  • ∟ order Caryophyllales
  • ∟ family Montiaceae
  • ∟ genus Montia (Blinks)
  • ∟ species Montia fontana (Water Blinks)
  • ∟ subspecies Montia fontana subsp. amporitana (Ampurdán Water Blinks)

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Morphology

Depending on whether it grows submerged in running water or stranded on damp mud, the plant ranges from loose, trailing stems up to 20 centimeters long to tight, yellowish-green rosettes only a few centimeters high.

Vegetative Features

  • Stems are smooth, translucent to reddish-tinted, and branch dichotomously while rooting readily at the lower nodes.
  • The opposite leaves are spoon-shaped to narrowly elliptic, measuring 3 to 15 millimeters long, with bases that fuse slightly around the stem node.

Flowers and Diagnostic Seeds

  • Small, self-pollinating flowers with five unequal white petals (2 to 3 millimeters long) and three stamens open briefly in sunshine or remain closed (cleistogamous) during cold, wet weather.
  • The decisive diagnostic feature of this subspecies lies in its 1 to 1.2 millimeter black seeds: the dorsal keel is bordered by several rows of conical, acute tubercles (microscopic pegs), while the lateral faces transition smoothly into flat, elongated polygonal cells.

Flowering season

Spring to autumn (April to October)

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Interesting facts

To the naked eye, the various subspecies of Montia fontana look almost identical in a muddy ditch, yet under a lens their seed coats reveal an extraordinary level of geometric precision that governs how the plant disperses and germinates.

Micro-Engineered Seed Surfaces

  • In Montia fontana subsp. amporitana, the outer cell walls of the seed coat (testa) are shaped into sharp, conical tubercles along the rim, which increase surface tension and allow the tiny seed to float briefly on thin films of rainwater before settling into damp silt.
  • When the three valves of the ripening capsule dry out, they contract inward like miniature spring-loaded jaws, squeezing the smooth lateral sides of the lens-shaped seed until it shoots up to a meter away.
  • In rainy or overcast conditions when insects are absent, the flowers never bother to open; instead, they practice cleistogamy — fertilizing themselves inside the closed bud so that seed production never fails during cold European springs.

Geography of distribution

  • Spain
  • Portugal
  • France
  • United Kingdom
  • Ireland
  • Italy
  • Germany
  • Netherlands
  • Belgium
  • Poland
  • Czechia
  • Austria
  • Switzerland
  • Morocco
  • Algeria
  • Australia
  • New Zealand

Sources

Technical Information

Taxon Synonyms: Montia fontana subsp. intermedia, Montia rivularis

External Databases: GBIF, POWO, Tropicos

See also

Common Water Blinks

Common Water Blinks

Montia fontana f. subsp. fontana

The nominate subspecies of water blinks, forming bright green mats in cold freshwater springs and …

Read more →
Typical Water Blinks

Typical Water Blinks

Montia fontana subsp. fontana

A lush, bright-green aquatic or semi-aquatic herb of cold, mineral-poor springs and mountain rills, distinguished …

Read more →