Amomum gagnepainii

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Amomum gagnepainii
Systematics
Order : Gingery (Zingiberales)
Family : Ginger family (Zingiberaceae)
Subfamily : Alpinioideae
Tribe : Alpinieae
Genre : Amomum
Type : Amomum gagnepainii
Scientific name
Amomum gagnepainii
TL Wu , K. Larsen & Turland

Amomum gagnepainii is a species of the genus Amomum withinthe ginger family (Zingiberaceae). It occurs in southeast China as well as in Vietnam.

description

Vegetative characteristics

Amomum gagnepainii grows as a perennial , herbaceous plant that reaches heights of about 1 meter. The hairless rhizomes are about 0.8 centimeters thick and covered with scales on the outside. The leathery and grooved scales are bare. The rhizome is short between the individual "pseudostems". Several clump-forming shoot axes or “pseudostems” go from each rhizome . The approximately 1 centimeter thick and slightly swollen stems at the base have scale-like hairless and grooved leaf sheaths , which are ovate-lanceolate with a length of about 3 centimeters. The leathery and rounded ligule are hairless and about 0.3 to 0.5 centimeters long; their upper end is truncated to rounded.

Each stem has several leaves . These are divided into petiole and leaf blade. The trough-shaped and bald petiole becomes about 0.5 centimeters long, but can also be completely absent. With a length of 20 to 30 centimeters and a width of 3 to 6 centimeters, the simple leaf blade is lanceolate to oblong-lanceolate with a rounded or long and tapering leaf base and a long tailed, 3 to 4 centimeter long upper end. The top of the leaf is just like the underside of the leaf bare. The leaf blades show a conspicuous leaf veins on the underside. The leaf margins are entire.

Generative characteristics

The flowering time of Amomum gagnepainii is in China at least in May and the fruits ripen in July. Close to the stem base from the rhizome develops on a 20 to 26 centimeter long and about 0.4 centimeter thick and bare inflorescence stem a cylindrical inflorescence with a length of 8 to 14 centimeters in which the flowers stand together. One inflorescence is formed per stem. The inflorescence stem is covered with leathery, grooved and hairless scales with wide and pointed or rounded upper ends, which are shaped triangular to broadly ovate with a length of about 0.5 to 1 centimeter and a width of 1 to 2 centimeters. The outside of the base felt-like , grooved and leathery, violet-colored bracts are with a length of 2 to 2.3 centimeters and a width of around 1 centimeter approximately elongated-lanceolate with cap-shaped and spurred upper ends and overlap like roof tiles. Each of the bracts has a flower. The membrane-like, felt-like hairs on the outside at the base, about 0.3 to 1.2 cm long and about 1 cm wide, are fused into a tube. Its tip is serrated twice, with the teeth 0.3 to 0.5 centimeters long.

The hermaphrodite flowers are zygomorphic and threefold with a double yellow perianth . The three membrane-like sepals with shaggy or felt-like hairs on the outside at the base, as well as grooved sepals are fused together in a tubular shape and are about 1 cm long and 0.3 cm wide, about the same length as the corolla tube. They are triple-toothed, with the calyx teeth having a pointed upper end. The three yellow and externally hairy, membrane-like petals are fused to form a corolla tube. There are three also yellow and hairless, membrane-like corolla lobes. The middle corolla lobe is about 1.4 centimeters long and about 0.9 centimeters wide, while the two lateral corolla lobes are also slightly narrower, also about 1.4 centimeters long and about 0.6 centimeters wide. Only the middle of the stamens of the inner circle is fertile . The fertile, about 1.1 centimeter large stamen has a flattened and bare stamen , which is about 0.5 centimeters long as the elongated and hairless anthers . The two lateral staminodes of the inner circle have grown together to form a labellum . The approximately 1.5 centimeters long and 1.2 centimeters wide, spatula to fan-like shaped labellum is yellow in the center with purple veins; it has a two-split tip and a pointed base. The lateral staminodes are tooth-like with a length of about 0.1 centimeters. Three fruit leaves are oblong-spherical to a dotted and matted up rough with long white hair occupied ovary grown. The stylus is hairy and ends in a cup-shaped and hairy scar with ciliated tip.

The shaft of the fruit stand, which is hairless at the base and otherwise shaggy with white hair, is 20 to 26 centimeters long and around 0.4 centimeters thick. There are several capsule fruits in a 8 to 14 centimeter long fruit cluster . These have a felt-like fruit stalk about 1 centimeter long and 0.2 to 0.3 centimeters thick. With a length of about 2 to 2.5 centimeters and a diameter of 1 to 1.8 centimeters, the almost spherical to egg-shaped capsule fruits are hairy. The surface of the fruit has curved or hook-shaped spines that are 0.2 to 0.3 centimeters long. Each of the three fruit compartments contains up to several seeds. The seeds are angularly shaped with a diameter of 3 to 4 millimeters.

Chromosome number

The number of chromosomes is 2n = 48.

Occurrence

The natural range of Amomum gagnepainii is in Southeast Asia . It includes the southwest of the Chinese province of Guangxi as well as parts of northeast Vietnam . The species grows in dense mountain forests.

Taxonomy

It was first described as Amomum gagnepainii in 2000 by Wu Te-lin , Kai Larsen and Nicholas J. Turland in Novon a journal of botanical nomenclature from the Missouri Botanical Garden. , Number 10, page 90 after François Gagnepain had already described the species as Amomum thyrsoideum in 1903 . However, this name turned out to be a homonym , which made it necessary to rename the species.

Hazard and protection

Amomum gagnepainii is in the red list of the IUCN classified since 2011 due to the insufficient data available about the type into any of the hazard categories.

swell

  • Vichith Lamxay, MF Newman: A revision of Amomum (Zingiberaceae) in Camboida, Laos and Vietnam . In: Edinburgh Journal of Botany . tape 69 , no. 1 . Trustees of the Royal Botanic Garden Edinburgh, 2012, p. 99-206 , doi : 10.1017 / S0960428611000436 .
  • Delin Wu, Kai Larsen: Zingiberaceae . Amomum. In: Wu Zheng-Yi, Peter H. Raven (Ed.): Flora of China . Flagellariaceae through Marantaceae. Volume 24. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 2000, Amomum gagnepainii , p. 353 (English, " Amomum gagnepainii - Online " - this work is online with the same text). (Sections Description, Occurrence and Systematics)

Individual evidence

  1. ↑ a b c d e f Vichith Lamxay, MF Newman: A revision of Amomum (Zingiberaceae) in Camboida, Laos and Vietnam . In: Edinburgh Journal of Botany . tape 69 , no. 1 . Trustees of the Royal Botanic Garden Edinburgh, 2012, p. 99-206 , doi : 10.1017 / S0960428611000436 .
  2. ↑ a b c d e f Delin Wu, Kai Larsen: Zingiberaceae . Amomum. In: Wu Zheng-Yi, Peter H. Raven (Ed.): Flora of China . Flagellariaceae through Marantaceae. Volume 24. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 2000, Amomum gagnepainii , p. 353 (English, " Amomum gagnepainii - Online " - this work is online with the same text). (Sections Description, Occurrence and Systematics)
  3. ^ A b Wu Delin (Wu Te-lin), Kai Larsen, Nicholas J. Turland: Four New Names in Chinese and Vietnamese Zingibaraceae . In: Novon . tape 10 , no. 1 , 2000, pp. 90 , doi : 10.2307 / 3393193 .
  4. ↑ Amomum gagnepainii at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved November 2, 2019.
  5. ↑ Meistera gagnepainii in the endangered Red List species the IUCN 2019 Posted by: J. Leong-Skornickova, HD Tran, M. Newman, V. & S. Lamxay Bouamanivong ,, 2011. Retrieved on November 2 of 2019.

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