''Schreiteria'' is a

monotypic genus In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

s belonging to the family

Montiaceae Montiaceae are a family of flowering plants, comprising about 14 genera with about 230 known species, ranging from small herbaceous plants to shrubs. The family has a cosmopolitan distribution. The family Montiaceae was newly adopted in the APG ...

. It is represented by the single species of ''Schreiteria macrocarpa'' . It is native to north-western Argentina.

Description

It is a

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 ...

herb with tuberous roots.

Klaus Kubitzki Klaus Kubitzki (born 1933) is a German botanist. He is an Emeritus professor in the University of Hamburg, at the Herbarium Hamburgense. He is known for his work on the systematics and biogeography of the angiosperms, particularly those of the ...

, Jens G. Rohwer and Volker Bittrich (Editors) The flowers are in

cymes An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed on ...

. James W. Byng The

bract In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of ...

s and

sepals A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...

are persistent (remaining to the maturity of fruit) but the bracts are deciduous. The

pollen Pollen is a powdery substance produced by seed plants. It consists of pollen grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophyt ...

is polyrugate (meaning that the pollen has more than one furrow,). The seed capsule is up to long and 3 valved. The seeds are compressed and irregularly papillate (covered in

papilla Papilla (Latin, 'nipple') or papillae may refer to: In animals * Papilla (fish anatomy), in the mouth of fish * Basilar papilla, a sensory organ of lizards, amphibians and fish * Dental papilla, in a developing tooth * Dermal papillae, part of ...

). It has an

embryo An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male spe ...

that almost encircles the

perisperm In seed plants, the ovule is the structure that gives rise to and contains the female reproductive cells. It consists of three parts: the ''integument'', forming its outer layer, the ''nucellus'' (or remnant of the megasporangium), and the fe ...

Taxonomy

The genus name of ''Schreiteria'' is in honour of Carlos Rodolfo Schreiter (1877–1942), a German-Argentinian botanist and student of

Miguel Lillo Miguel Ignacio Lillo (26 July 1862, in San Miguel de Tucumán – 4 May 1931, in San Miguel de Tucumán) was an Argentine naturalist and professor. Early life and education Born in the city of San Miguel de Tucuman in 1862, Lillo was related ...

. The Latin

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

of ''macrocarpa'' meaning with large fruit, from Greek 'makros' meaning large and 'karpos' meaning fruit. Both the genus and the sole species were first described and published in Parodiana Vol.3 on page 330 in 1985. The genus is recognized by the

United States Department of Agriculture The United States Department of Agriculture (USDA) is the United States federal executive departments, federal executive department responsible for developing and executing federal laws related to farming, forestry, rural economic development, ...

and the

Agricultural Research Service The Agricultural Research Service (ARS) is the principal in-house research agency of the United States Department of Agriculture (USDA). ARS is one of four agencies in USDA's Research, Education and Economics mission area. ARS is charged with ext ...

, but they do not list any known species.

References

{{Taxonbar, from1=Q2249821, from2=Q16390171 Montiaceae Flora of Northwest Argentina