Siliquamomum alcicorne
| Siliquamomum alcicorne | ||||||||||||
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| Scientific name | ||||||||||||
| Siliquamomum alcicorne | ||||||||||||
| Škorničk. & Trần H.Đ. |
Siliquamomum alcicorne is a species of the genus Siliquamomum withinthe ginger family (Zingiberaceae). It occurs in central Vietnam .
description
Vegetative characteristics
Siliquamomum alcicorne grows as a perennial , herbaceous plant that can reach heights of up to 2 meters. The branched, creamy-white inside and purple to black-tinted rhizomes , which run only flat under the ground, are up to 2 centimeters thick and covered with scales on the outside. They give off a light, fragrant odor reminiscent of cinnamon and camphor . The paper-like scales are brown to black in color. 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 from which up to a height of 20 to 45 centimeters above the floor no sheets have. At the base, the stems have three to five green, hairless leaf sheaths with dark, almost black edges. The dark brown to black, paper-like and easily perishable, bald membranes are 0.2 to 0.3 centimeters long; their upper end is lobed twice.
Each stem has eight to eleven leaves . These are divided into petiole and leaf blade. The petiole is inconspicuous. With a length of up to 40 centimeters and a width of up to 9 centimeters, the simple leaf blade is approximately elliptical to elliptical with a tapering leaf base and a tapering upper end. The glossy, greenish shimmering and hairless top of the leaf is dark green while the bare underside of the leaf is slightly lighter in color. The leaf margins are entire.
Generative characteristics
The exact flowering time of Siliquamomum alcicorne has not yet been determined, flowering specimens were found from early March to April, but some of the fruits that were already developed at that time suggest a possible beginning of flowering in January. At the end, on a light green, frosted and hairless inflorescence shaft up to 15 centimeters long and enclosed by the leaf sheaths, there is a slackly hanging, thyrsus-like inflorescence in which the seven to ten flowers are close together. The light green and outside bare bracts at the base of the inflorescence are boat-shaped with a length of about 9 centimeters and a width of about 3.7 centimeters with spiky, about 0.4 centimeters long upper ends. They fall off after a short time and leave semicircular scars on the inflorescence stem. The strongly receding or completely missing bracts of the fertile flowers are whitish green in color and fall off after a short time. Cover sheets are missing.
The hermaphroditic, about 7 to 8 centimeters long flowers are zygomorphic and threefold with double, white perianths and are on a 0.3 to 0.6 centimeter long and about 0.1 centimeter thick, light green and bare flower stalk. The three translucent, white and externally hairless sepals are fused together like a barrel and are about 2.6 to 3 centimeters long and about 1.3 centimeters wide than the corolla tube. The calyx tube is split about 0.9 to 1.1 centimeters deep on one side. They are triple-toothed, with the calyx teeth being 0.7 to 1 centimeter long. The three creamy white petals are fused to about 1.4 centimeters long and bare corolla tubes. There are three creamy white and hairless corolla lobes. The middle corolla lobe is elliptically shaped with a length of about 2.8 centimeters and a width of about 2 centimeters wide. The two lateral crown lobes are somewhat narrower with a length of about 2.7 centimeters and a width of around 1.7 centimeters and are elliptical in shape. Only the middle of the up to 2.2 cm long stamens of the inner circle is fertile . The fertile stamen has a greenish white stamen about 0.3 centimeters long and equally wide, sparsely hairy on the back . The anther greenish to creamy white on the back and yellow at the top are around 1.8 centimeters long and 0.55 to 0.6 centimeters wide. The staminodes of the inner circle have grown together to form a labellum with a rounded upper end and curled edges. The labellum, about 3.2 centimeters long and 2.4 centimeters wide, is sulfur yellow with a dark green spot at the top; it is covered in the middle of the top with some glandular hairs. The lateral, greenish to sulfur-yellow and bare staminodes are about 2.4 centimeters long and about 0.8 centimeters wide, oblong, obovate, with a rounded tip, and their lower two-thirds are fused with the labellum. Three carpels are fused into a three-chambered, green, hairless and approximately cylindrical ovary with a length of 2 to 2.5 centimeters and a diameter of about 0.25 to 0.4 centimeters . Of about 3.5 centimeters long, white stylus is hairless and grown in the lower half with the corolla tube and ends in a long about 0.18 centimeters, club-shaped scar with ciliated tip.
The green capsule fruits are up to 20 centimeters long and around 1 centimeter thick. They contain numerous rust-brown seeds which are 0.7 to 1 centimeter long and have a cream-colored to light brown aril .
Occurrence
The natural range of Siliquamomum alcicorne is in central Vietnam . As far as is known so far, it comprises two locations in the Kon Plông district in the province of Kon Tum . The species thrives at altitudes of 1100 to 1300 meters where it grows on slopes in evergreen forests as well as along shallow rivers.
Taxonomy
The first description as Siliquamomum alcicorne was made in 2014 by Jana Leong-Škorničková and Trần Hữu Đăng in Garden's Bulletin Singapore , volume 66, number 1, page 40. The specific epithet alcicorne refers to the connection between the two anther halves, which extends beyond the anthers First authors reminded them of the antlers of an elk ( Alces alces ).
swell
- J. Leong-Škorničková, H. Đ. Trần, QB Nguyễn & O. Šída: Siliquamomum alcicorne (Zingiberaceae: Alpinioideae), a new species from central Vietnam . In: Garden's Bulletin Singapore . tape 66 , no. 1 , 2014, p. 39–46 ( gov.sg [PDF; 495 kB ; accessed on May 22, 2018]).