TALL MINT

Mentha × vismithiana

(Mentha arvensis × Mentha aquatica × Mentha spicata)
Mint / Dead-Nettle Family [Lamiaceae]

month8jul month8july month8aug month8sep month8sept month8oct

status
statusZneophyte
 
flower
flower8purple
 
flower
flower8lilac
 
morph
morph8hemizygo
 
petals
petalsZ4
 
type
typeZtieredwhorls
 
stem
stem8square
 
smell
smell8Peppermint
Peppermint
sex
sexZbisexual
 
sex
sexZsterile
usually

23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
Tall Mint is a triple hybrid growing to 1.5m high, which is why it is called Tall Mint.


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
It has numerous well-separated whorls of purplish to lilac flowers.


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
The leaves are ovate and rounded to broad-cuneate at the base with forwardly-directed pointed teeth. [The larger cordate leaves which are mostly on the right are of another plant]


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
The whorls of flowers occur just above the pairs of opposite leaves.


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
The flowers have 4 petals and are slightly zygomorphic (hemi-zygomorphic). They have a long white protruding styles with two stigmas at the tip. The four anthers are deep within the flower, just about visible in the flower just right of centre.


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
Part of a specimen on a metric grid, the smallest squares, somewhat strangely, being 2 millimetres (your Author thinks).


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
The plant is subglabrous (it has a few hairs - seen especially on the veins on the obverse of the leaves)


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
The (somewhat laterally squashed) whorl of flowers this time with anthers which protrude well beyond the petals. Everything has a reddish tinge; the leaves, the stem, the ribs and teeth on the sepal tube and the hydathodes at the tips of the leaf teeth


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
The whorls are all apparently in two halves and on opposite sides of the square stems.


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
The sepal tubes are on reddish stalks about as long as the sepal tubes. There is a ring of many long narrow triangular bracts just beneath those. The plant is usually sterile. Here both forked stigmas and anthers extend well above the flower opening (apart from the flower recently opened lower down with the pink anthers)


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
The hydathodes at the tip of leaf teeth.


23rd Aug 2007, Roud, IoW. Photo: (CC by 2.0) Geoff Toone
The square stem ('up' is top left to bottom right)



This is the triple hybrid between Corn Mint (Mentha arvensis), Water Mint (Mentha aquatica) and Spear Mint (Mentha spicata) (but just sometimes between Spear Mint (Mentha spicata) and Whorled Mint (Mentha × verticulata) where the latter is the hybrid of Corn Mint (Mentha arvensis) and Water Mint (Mentha aquatica)]. So both versions are the hybrids between the same three species, but obtained in different ways.

It is a naturalised neophyte and is grown in gardens, from where it can sometimes escape. It is found in dampish places and waste ground and is found scattered throughout the British Isles. Usually as a garden throwout.


  Mentha × vismithiana  ⇐ Global Aspect ⇒ Lamiaceae  

Distribution
 family8Mint / Dead-Nettle family8Lamiaceae
 BSBI maps
genus8Mentha
Mentha
(Mints)

TALL MINT

Mentha × vismithiana

(Mentha arvensis × Mentha aquatica × Mentha spicata)
Mint / Dead-Nettle Family [Lamiaceae]