Siliquamomum oreodoxa

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Siliquamomum oreodoxa
Systematics
Order : Gingery (Zingiberales)
Family : Ginger family (Zingiberaceae)
Subfamily : Alpinioideae
Tribe : insecure position (incertae sedis)
Genre : Siliquamomum
Type : Siliquamomum oreodoxa
Scientific name
Siliquamomum oreodoxa
NS Lý & Škorničk.

Siliquamomum oreodoxa is a species of plant in the genus Siliquamomum withinthe ginger family (Zingiberaceae). It occurs in southern Vietnam .

description

Vegetative characteristics

Siliquamomum oreodoxa grows as a perennial , herbaceous plant that can reach heights of up to 0.9 meters. The more or less subterranean, creamy white and branched rhizomes are about 0.8 to 1.2 centimeters thick and covered with scales on the outside. They give off a light, fragrant odor. The paper-like brown scales are triangular in shape with a length of about 1 to 2 centimeters. The rhizome is about 3 to 5 centimeters long between the individual stems or "pseudo-trunks". From each rhizome go more, a loose Horst forming stems having from which up to a height of 15 to 30 centimeters above the floor no leaves. At the base, the stems have three to five yellowish-green to dark brown-green, hairless leaf sheaths with dark brown margins. The dark brown, papiar-like and easily perishable, bald ligaments are about 0.2 to 0.3 centimeters long; their upper end is lobed twice.

Each stem has 9 to 13 leaves . These are divided into petiole and leaf blade. The green petiole is hairless and 1 to 2 centimeters long. The simple leaf blade is elliptical to approximately ovoid with a length of 9.5 to 18 centimeters and a width of 2.5 to 4.5 centimeters with a wedge-shaped leaf base and a pointed upper end. The glossy top of the leaf is dark green while the underside of the leaf is a little lighter in color. The leaf margins are entire.

Generative characteristics

The flowering period of Siliquamomum oreodoxa includes the months of June and July. At the end, on a light green and hairless inflorescence stem up to 9 centimeters long and approx. 0.2 centimeters thick, and enclosed by the leaf sheaths, there is a slack, hanging, thyrsus-like inflorescence in which the 8 to 25 flowers are close together. The light green and outside bare bracts at the base of the inflorescence are boat-shaped with a length of 4.5 to 7 centimeters and a width of 1.8 to 2.5 centimeters with an occasionally widened upper end. They fall off after a short time and leave semicircular scars on the inflorescence stem. The approximately egg-shaped to elliptical bracts of the fertile flowers are in the lower inflorescence area up to 2.5 to 3 centimeters long and 0.6 to 0.8 centimeters wide while they are in the upper inflorescence area with a length of 0.1 to 0.8 centimeters as well 0.1 to 0.15 centimeters wide are frusto triangular in shape. All bracts of the fertile flowers are colored whitish green to paper brown. Cover sheets are missing.

The hermaphrodite, around 5.5 centimeters long flowers are zygomorphic and threefold with double, white perianths and are on a 0.3 to 0.6 centimeter long and around 0.1 centimeter thick, light green and bare flower stalk. The three translucent, white, paper-like sepals , occasionally tinged with light pink at the edges, are fused together in a tube shape and are slightly longer than that with a length of 1.8 to 2.5 centimeters and a width of 0.6 to 0.7 centimeters Corolla tube. The calyx tube is split about 0.9 to 1.1 centimeters deep on one side. They are triple-toothed, the calyx teeth, which later turn brown, are 0.3 to 0.5 centimeters long and around 0.4 centimeters wide at their base, and have a hairless outside and a pointed tip. The three white petals have grown together to form a corolla tube 1.9 to 2.1 centimeters long and, with the exception of the sparsely hairy tip, bald corolla tube. There are three translucent white and hairless corolla lobes. The middle corolla lobe has a length of 2.2 to 2.7 centimeters and a width of 0.8 to 1 centimeter, elliptically elongated. The two lateral corolla lobes are slightly narrower with a length of 2 to 2.4 centimeters and a width of 0.6 to 0.8 centimeters and are oblong to obovate-oblong in shape. Only the middle of the 1.5 to 2 cm long stamens of the inner circle is fertile . The fertile stamen has a 0.6 to 0.8 centimeter long and 0.2 to 0.25 centimeter wide, sparsely hairy, white stamen at the base . The white to light cream-colored anthers are 0.9 to 1.2 inches long and 0.3 to 0.35 inches wide. The staminodes of the inner circle have grown together to form a labellum with a blunt or edged upper end. The 2.2 to 2.6 centimeters long and 1.8 to 2 centimeters wide labellum is white with a dark green spot in the middle which is bordered by yellow edges; it is covered with white hairs about 1 centimeter long in the middle of the top. The lateral, white staminodes are 1.9 to 2.1 centimeters long and 1.1 to 1.3 centimeters wide, oblong, obovate, with a rounded tip, and their lower thirds are fused with the labellum. Three carpels are a dreikammerigen, light yellow green, hairless and with a length of 1.2 to 1.4 centimeters and a diameter of about 0.12 to 0.2 centimeters approximately cylindrical ovary grown. The 3.3 to 3.6 centimeters long, white stylus is hairless and ends in a about 0.12 centimeters long, club-shaped scar with ciliated tip.

Nothing is known about the fruit.

Occurrence

The natural range of Siliquamomum oreodoxa is in southern Vietnam . It includes known so far the province Lam Dong Province situated National Park Bidoup-Nui Ba , as well as in the province of Khanh Hòa located Hon Ba Nature Reserve . The species thrives at altitudes of 1500 to 1800 meters where it grows in the damp and shady undergrowth in coniferous and mixed forests .

Taxonomy

It was first described as Siliquamomum oreodoxa in 2010 by Ngoc-Sam Lý and Jana Leong-Škorničková in Garden's Bulletin Singapore , Volume 61, Number 2, Page 359. The specific epithet oreodoxa is made up of the Greek oreo , which means something like mountains or mountains Concerning the mountains means and doxa for fame or splendor and, according to the first authors, refers to the occurrence of the beautiful species in the mountains.

Hazard and protection

Siliquamomum Oreodoxa is in the red list of the IUCN out "strong risk" since 2011th The main reason for endangerment is the destruction of the habitat through rededication to arable land and road construction.

swell

  • NS Ly, S. Hul & J. Leong-Škorničková: Siliquamomum oreodoxa (Zingiberaceae): a New Species from Southern Vietnam . In: Garden's Bulletin Singapore . tape 61 , no. 2 , 2010, p. 119–128 ( gov.sg [PDF; 3.5 MB ; accessed on May 17, 2018]).

Individual evidence

  1. ↑ a b c d e f g h NS Lý, S. Hul & J. Leong-Škorničková: Siliquamomum oreodoxa (Zingiberaceae): a New Species from Southern Vietnam . In: Garden's Bulletin Singapore . tape 61 , no. 2 , 2010, p. 119–128 ( gov.sg [PDF; 3.5 MB ; accessed on May 17, 2018]).
  2. ↑ a b Siliquamomum Oreodoxa in the endangered Red List species the IUCN 2017 Posted by: J. Leong-Skornickova, HD Tran, M. Newman, V. & S. Lamxay Bouamanivong, 2011. Retrieved on 17 May 2018th

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