''Stenomesson chloranthum'' is a species 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 amaryllis family,

Amaryllidaceae The Amaryllidaceae are a family of herbaceous, mainly perennial and bulbous (rarely rhizomatous) flowering plants in the monocot order Asparagales. The family takes its name from the genus '' Amaryllis'' and is commonly known as the amaryl ...

. 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 ...

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

. Alan Meerow and Henk van der Werff the botanists who first formally described the species, named it after its green (Latinized form of Greek , khlōrós) flowers (Latinized form of Greek , ánthos).

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 In general use, herbs are a widely distributed and widespread group of plants, excluding vegetables and other plants consumed for macronutrients, with savory or aromatic properties that are used for flavoring and garnishing food, for medicina ...

with a round bulb that is 2.5-4 centimeters in diameter. It has 2-3 dull, olive green leaves that are 25-29 by 2-2.5 centimeters with blunt tips. Its

inflorescence 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 ...

s are on a stem-like stalk that is 30-40 centimeters long. The flowering stalk is 7-8 millimeters in diameter at its base tapering to 5 millimeters at its apex. The flowering stalk is circular and solid in cross section. Its flowers occur in clusters of 5-10 at the top of the stalk. The cluster of flowers is subtended by 2 pale green bracts that are 2.5-3 by 1-1.5 centimeters and come to a point at their tips. The pale green, bell-shaped flowers are 5.8-6.7 centimeters long. The base of the flower is a 3.5-4 centimeter tube that is 2.5-3.1 millimeters wide at the bottom and opens near the top to 8.3-9 millimeters. Atop the floral tube are 6

tepal A tepal is one of the outer parts of a flower (collectively the perianth). The term is used when these parts cannot easily be classified as either sepals or petals. This may be because the parts of the perianth are undifferentiated (i.e. of very ...

s arranged in two rows. The elliptical outer tepals are 17.7-18.5 by 8-8.5 millimeters and come to a point at their tip. The elliptical inner tepals are 16.8-18.3 by 8.3-8.9 millimeters and have blunt tips. Its flowers have 6

stamen The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filam ...

s with filaments that are 8.3-8.7 by 2.7-3 millimeters and anthers that are 3 millimeters long. Its flowers have a single thread-like

style Style is a manner of doing or presenting things and may refer to: * Architectural style, the features that make a building or structure historically identifiable * Design, the process of creating something * Fashion, a prevailing mode of clothing ...

that is 6 centimeters long and topped by a 3-lobed stigma. Its flowers have an ellipsoid ovary that is 7.5-8 by 4.3-5 millimeters with 3 chambers. Each of the ovary chambers has numerous

ovule 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 f ...

s. Its fruit are conical with numerous black flat seeds that have wings.

Distribution and habitat

Its low elevation habitat, , is notable among Peruvian '' Stenomesson'' species.

Reproductive biology

The pollen is shed as permanent tetrads.

References

{{Taxonbar, from=Q15505194 Amaryllidoideae Endemic flora of Peru Species described in 2004 Taxa named by Alan Meerow