20140612 VanDusen Tropaeolum Polyphyllum

''Tropaeolum polyphyllum'' is a

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. They include all forbs (flowering plants without a woody stem), grasses and grass-like plants, a vast majority of ...

in the nasturtium

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Tropaeolaceae. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

to mountainous regions of

Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the eas ...

and

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, t ...

where it is called in

Spanish Spanish might refer to: * Items from or related to Spain: ** Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Ca ...

soldadito grande de la cordillera (great soldier of the mountains).

Description

This

herbaceous Herbaceous plants are vascular plants that have no persistent woody stems above ground. This broad category of plants includes many perennials, and nearly all annuals and biennials. Definitions of "herb" and "herbaceous" The fourth edition ...

perennial A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ...

overwinters as a

tuber Tubers are a type of enlarged structure used as storage organs for nutrients in some plants. They are used for the plant's perennation (survival of the winter or dry months), to provide energy and nutrients for regrowth during the next growin ...

deep in the soil. It sends out long rhizomes from which shoots develop which trail over the ground. These are densely covered with silvery green, deeply lobed leaves. The flower buds have inflated pale green calyces and the sepals are extended backwards into a short spur. The relatively large and showy flowers are borne on long slender stalks and are golden yellow. After flowering, which takes place in mid-summer, the shoots die back and the plant remains

dormant Dormant, "sleeping", may refer to: Science *Dormancy Dormancy is a period in an organism's life cycle when growth, development, and (in animals) physical activity are temporarily stopped. This minimizes metabolic activity and therefore helps ...

until the following year.

Distribution and habitat

''Tropaeolum polyphyllum'' is endemic to the central

Andes The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S ...

in Chile and Argentina where it grows at heights of up to above sea level. Its typical habitat is among scantily vegetated stony ground or on scree where it forms small hummocks of grey-green foliage studded with yellow flowers. In this area, summer droughts may last for several months and what precipitation there is, falls mainly in the winter. The plant has small, rounded tubers which are buried deep in the ground and which enable it to survive being covered with snow for several months and withstand temperatures down to .

Cultivation

''Tropaeolum polyphyllum'' needs full sun and neutral or slightly acid, well drained soil. It grows well on hot, dry banks and is hardy when fully established. Propagate from tubers or by seed. The seeds should be sown in the spring in well-drained compost and covered with of sand. The containers should be kept at below until the seedlings appear in about a month. Too high a temperature inhibits

germination Germination is the process by which an organism grows from a seed or spore. The term is applied to the sprouting of a seedling from a seed of an angiosperm or gymnosperm, the growth of a sporeling from a spore, such as the spores of fungi, ...

. The

USDA Hardiness Zone A hardiness zone is a geographic area defined as having a certain average annual minimum temperature, a factor relevant to the survival of many plants. In some systems other statistics are included in the calculations. The original and most wide ...

is 7.

References

{{Taxonbar, from=Q7845600 polyphyllum Taxa named by Antonio José Cavanilles