Larsenianthus assamensis

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This page should be cited as follows (rationale):
Kress W, D. Mood J, Sabu M, Prince L, Dey S, Sanoj E (2010) Larsenianthus, a new Asian genus of Gingers (Zingiberaceae) with four species. PhytoKeys 1 : 15–32, doi. Versioned wiki page: 2011-04-13, version 4377, https://species-id.net/w/index.php?title=Larsenianthus_assamensis&oldid=4377 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Kress2010PhytoKeys1,
author = {Kress, W. John AND D. Mood, John AND Sabu, Mamiyil AND Prince, Linda M. AND Dey, Santanu AND Sanoj, E.},
journal = {PhytoKeys},
publisher = {Pensoft Publishers},
title = {Larsenianthus, a new Asian genus of Gingers (Zingiberaceae) with four species},
year = {2010},
volume = {1},
issue = {},
pages = {15--32},
doi = {10.3897/phytokeys.1.658},
url = {http://www.pensoft.net/journals/phytokeys/article/658/abstract},
note = {Versioned wiki page: 2011-04-13, version 4377, https://species-id.net/w/index.php?title=Larsenianthus_assamensis&oldid=4377 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Larsenianthus, a new Asian genus of Gingers (Zingiberaceae) with four species
A1 - Kress W
A1 - D. Mood J
A1 - Sabu M
A1 - Prince L
A1 - Dey S
A1 - Sanoj E
Y1 - 2010
JF - PhytoKeys
JA -
VL - 1
IS -
UR - http://dx.doi.org/10.3897/phytokeys.1.658
SP - 15
EP - 32
PB - Pensoft Publishers
M1 - Versioned wiki page: 2011-04-13, version 4377, https://species-id.net/w/index.php?title=Larsenianthus_assamensis&oldid=4377 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/phytokeys.1.658

Wikipedia/ Citizendium:

<ref name="Kress2010PhytoKeys1">{{Citation
| author = Kress W, D. Mood J, Sabu M, Prince L, Dey S, Sanoj E
| title = Larsenianthus, a new Asian genus of Gingers (Zingiberaceae) with four species
| journal = PhytoKeys
| year = 2010
| volume = 1
| issue =
| pages = 15--32
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/phytokeys.1.658
| url = http://www.pensoft.net/journals/phytokeys/article/658/abstract
| pmc =
| accessdate = 2020-11-24

}} Versioned wiki page: 2011-04-13, version 4377, https://species-id.net/w/index.php?title=Larsenianthus_assamensis&oldid=4377 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Familia: Zingiberaceae
Genus: Larsenianthus

Name

Larsenianthus assamensis S. Dey, Mood, & S. Choudhury sp. nov.Wikispecies linkIPNI linkPensoft Profile

Latin

Species nova L. careyano affinis, a quo planta minore semidecumbenti, inflorescentia minore (circa 8 × 4 cm) ovoidea bracteis coccineis ad margines dentatis, ad bracteam quamque flore fertili solitari et labello angustiore magis roseo differt.

Type

India: Assam: Cachar Dist., Bhaluknala, Barail Wildlife Sanctuary, narrow substream of Lakhicherra, 24°58'50.7" N, 92°46'30.8" E. Cachar tropical semi-evergreen forest, 26 m elevation, August 2007, S. Dey 1012 (holotype: CAL!; isotype: ASSAM!).

Description

Evergreen herb, medium-sized to 144 cm tall, rhizome fibrous, elongate in distinct sections, bulbous, white-colored internally; tubers absent. Leafy shoots 7–17 per plant, erect or slightly decumbent, base bulbous. Leaves 7–12 per shoot, to 35 cm in total length; basal leaf sheaths 3–5, light pink, drying brown, deciduous; petiole 0–7 mm in length; ligule 7 mm in length × 5 mm in width, bilobed, apices rounded; lamina 24–34 cm in length × 5.4–8.5 cm in width, elliptic, dark green and glabrous above, base aequilateral, tip acuminate, midrib and veins depressed, abaxial surface dull green and glaucous. Inflorescence terminal on leafy shoot, erect to 14 cm in height; apical part of peduncle 3–5 cm in length × 3–5 mm in diameter, light green-brown, glabrous; involucral bract 4.2 cm in length × 1 cm in width, green, red striated, apex cirrose; 1 adventitious plantlet produced in sterile bracts at base of old inflorescence; spike ovoid to ellipsoid, 5.5–8.5 cm in length × 3.8–4 cm in diameter; inflorescence bracts c. 35 per inflorescence, 2.1–2.8 cm in length × 1–1.3 cm in width, ovate-oblong, concave, loosely clasping, red-veined, margin corrugate and denticulate, apex mucronate, revolute with long hairs, apical bracts smaller, sterile; one cincinnus per bract; bracteole lanceolate, cymbiform, 27 mm in length × 19 mm in width, semi-transparent, white, apex tapered, red. Flowers conspicuous, 1–4 per bract (usually only a single flower fertile); calyx tubular, 8–14 mm in length × 5 mm in diameter, trilobed, white, apex pink; floral tube 19–27 mm in length × 2–2.5 mm in diameter, pink-red, glabrous, corolla lobes linear-lanceolate, dorsal lobe 13 mm in length × 2 mm in width and reflexed 90°, ventral lobes 11 mm in length × 2 mm in width and deflexed and parallel to floral tube, orange-red with darker apex; lateral staminodes ovate, 6 mm in length × 3 mm in width, light orange with translucent dots, apex irregular, reflexed; labellum 22–25 mm in length × 2–3 mm in width, elongate, oblong, ‘v’ in cross-section, basal margins thickened, light orange, apex slightly trilobed, outer lobes 1 mm in length, rounded, curved upward toward apex, purplish-white; fertile stamen with filament c. 18 mm in length, arched, greenish purple at base, light orange-white distally, oblong, anther 3 mm in length × 0.5 mm in width, thecae glossy purple; pollen white; epigynous glands two, unequal, largest 3 mm in length × 0.5 mm in width and linear, smallest 2 mm in length × 0.5 mm in width and cylindric, dark purple; stigma 0.5 mm in length, extending 5 mm beyond anther, purplish; ovary trilocular, 2 mm in length × 1 mm in width, obovoid-oblong, unequally 3-lobed, pubescent, purplish. Fruits 8–9 mm in length × 4–4.5 mm in width, oblong to ellipsoid, white, capsular, dehiscing into three separate coiled sections, seeds 1–4, c. 3 mm in length × 2 mm in width, obovoid, seeds light to dark violet, enclosed in a cocoon-like arillate membrane.

Distribution

Known only from two locations in the Barail Wildlife Sanctuary. Larsenianthus careyanus is also frequently found in this same region.

Ecology

This species occurs in the understory of tropical semi-evergreen forest in very moist conditions along streams (rainfall 350–400 cm/yr) at 25–150 m in elevation. Associated plants are species of Musa, Curculigo, Begonia, Albizzia, Ampelocissus, Dysoxylum, Laportea, Uncaria, and ferns.

Etymology

Named for the Indian state of Assam where this species is endemic.

Specimens examined

India: Assam: Cachar Dist., Lakhicherra, Barail Wildlife Sanctuary, 24°59.053' N, 92°46.525' E. ca. 150 m. elevation, 30 August 2007, S. Dey s.n. (living material only).

Original Description

  • Kress, W; D. Mood, J; Sabu, M; Prince, L; Dey, S; Sanoj, E; 2010: Larsenianthus, a new Asian genus of Gingers (Zingiberaceae) with four species PhytoKeys, 1: 15-32. doi

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