Tropaeolum incisum

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Tropaeolum incisum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Brassicales
Family: Tropaeolaceae
Genus: Tropaeolum
Species:
T. incisum
Binomial name
Tropaeolum incisum
(
Speg.
) Sparre
Synonyms[1]
  • T. polyphyllum var. incisum
  • T. polyphyllum forma schizophyllum

Tropaeolum incisum is a species of nasturtium, with flaring petals in shades of yellow and peach, when still in bud and on the outside darker, more orange-brown and sometimes stained purple, with creeping or climbing stems, in the wild up to about 60 cm long with deeply divided, blue-grey leaves, with undulating lobes, that grows on the dry eastern side of the southern Andes mountains.[2]

Description

Tropaeolum incisum is a

mericarps) of 5–6 mm long. In good garden soil plants grow more vigorous and climb up to 2 m. In its native area it flowers from September to February.[2][3][4]

Differences with related species

Tropaeolum incisum looks a lot like T. polyphyllum, which also has stems that spread across the soil and has greyish blue leaves. The leaves of T. incisum however are larger and more grey rather than blue, while the leaflets are deeper divided and have strongly undulating edges. The flowers of both species are similar however, although T. polyphyllum may have a brighter yellow color.[2]

Taxonomy

Genetic analysis suggests that T. incisum is closely related to T. polyphyllum as well as T. leptophyllum. T. myriophyllum might originate from a cross between T. leptophyllum and T. incisum.[5]

Distribution and ecology

Tropaeolum incisum is concentrated in the Argentinean lake district of northern Patagonia (northern Chubut, western Río Negro, Neuquén, and southern Mendoza Provinces), and can also be found in neighboring Chile but only near the passes. It may grow at elevations up to 3000 m. It grows in arid, sandy fields and low scree in the rain shadow of the Andes.[2] Hyposchila galactodice, a butterfly belonging to the Pieridae that occurs in western Patagonia, Argentina, is a specialist feeding on Tropaeolum incisum.[6]

Cultivation

Tropaeolum incisum is sometimes grown as an ornamental and is on offer from several seed companies and nurseries. It can best be grown in free draining soil in full sunlight and avoiding competition, such as in a bulb frame or alpine house, particularly in climates that are moist during the plant's hibernation period.[7]

References

  1. ^ "Tropaeolum polyphyllum fo. schizophyllum Ross ex Neger". Tropicos.
  2. ^
    doi:10.1111/j.1467-8748.2010.01702.x
    .
  3. doi:10.1006/anbo.2001.1525
    . Retrieved 2006-02-14.
  4. ^ Garralla, Silvina; Bulacio, Eva (2011). "El Polen de las Especies Argentinas de Tropaeolum (Tropaeolaceae)". Darwiniana. 49 (2): 119–130. Retrieved 2016-02-14.
  5. S2CID 41902374
    . Retrieved 2016-02-14.
  6. ^ Shapiro, A.M. (1990). "The life histories and behavior of the Patagonian-Fuegian white butterflies Hypsochila microdice and H. galactodice (Lepidoptera: Pieridae)". Journal of the New York Entomological Society. 98 (4): 461–473. Retrieved 2016-02-14.
  7. ^ "Tropaeolum incisum". Alpine Garden Society - Plant Encyclopaedia. Retrieved 2016-02-14.
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