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Achyranthes atollensis

(Hawai'i Chaff Flower)

Overview

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Extinct

Threat status

Common Names

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Common Names in English:

Hawai'i Chaff Flower

Description

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Genus Achyranthes

Herbs, perennial or annual . Stems erect to ascending . Leaves opposite, petiolate ; blade elliptic , ovate to orbiculate, or broadly rhombate, margins entire. Inflorescences terminal and axillary , pedunculate , elongate , many-flowered, simple spikes or few-branched panicles; flowers crowded together at tips , becoming more widely spaced toward base . Flowers bisexual , often becoming deflexed with age; tepals 4 or 5, basally connate , without ornamentation, coriaceous , becoming indurate in fruit, ± glabrous ; filaments basally connate into short tubes or cups ; anthers 4-locular; pseudostaminodes 5; ovary obovoid or turbinate ; ovule 1; style elongate; stigma 1, capitate. Utricles enclosed by and falling with indurate tepals, elliptic or cylindric , membranous, indehiscent. Seeds 1, inverted , obovoid or ovoid , smooth .

Species 8-12: c and se United States, Mexico, West Indies, Central America, South America, tropical , subtropical , and warm-temperate regions of the Old World.

The groups of plants referred to as Achyranthes and Alternanthera have been subject to considerable nomenclatural confusion, primarily because P. C. Standley (1915) designated Achyranthes repens Linnaeus as the lectotype species of Achyranthes. As a result, species that had been placed in Achyranthes were transferred to Centrostachys Wallich, and species that had been in Alternanthera were transferred to Achyranthes. A. A. Bullock (1957; see also R. Melville 1958) showed that Standley's lectotypification was incorrect and that the type species of Achyranthes is Achyranthes aspera Linnaeus. The generic concepts of Achyranthes and Alternanthera then returned to those prior to 1915.[1]

Physical Description

Habit: Shrub

Habitat

Ecology: A perennial shrub of dry shrublands on calcareous sand, atolls , and on emerged atolls.[2]


List of Habitats :13.3Marine Coastal/Supratidal - Coastal Sand Dunes

Biology

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Reproduction

Duration: Perennial

Taxonomy

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Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 15-Mar-2000

Similar Species

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Members of the genus Achyranthes

ZipcodeZoo has pages for 216 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

A. abyssinica · A. acuminata · A. alba · A. albida · A. alopecuroides · A. alternifolia · A. altissima · A. amabilis · A. amaranthoides (Jiang Guo Xian) · A. ancistrophora · A. angustifolia · A. annua · A. aphylla · A. aquatica · A. arborescens · A. argentea · A. aspera (Devil´s Horsewhip) · A. aspera obtusifolia · A. aspera var. argentea · A. aspera var. aspera (Devil's Horsewhip) · A. aspera var. canescens · A. aspera var. indica · A. aspera var. obtusifolia · A. aspera var. porphyristachya · A. aspera var. pubescens (Devil's Horsewhip) · A. aspera var. rubro-fusca · A. aspera var. sicula · A. aspera var. simplex · A. aspera var. velutina · A. atollensis (Hawai'i Chaff Flower) · A. atra · A. atropurpurea · A. australis · A. avicularis · A. axillaris · A. baccata · A. bangii · A. bengalensis · A. benthamii · A. bettzickiana · A. bidentata (Pig's Knee) · A. bidentata f. rubra · A. bidentata var. japonica · A. bidentata var. villosa · A. biemilleri · A. boliviana · A. borbonica · A. brachiata · A. brasiliana · A. breviflora · A. calceolata · A. calea · A. canescens · A. capitata · A. capituliflora · A. carnosa · A. carsonii · A. chacoensis · A. chinensis · A. ciliata · A. conferta · A. cordata · A. cordobensis · A. corymbosa · A. costaricensis · A. coynei · A. crassifolia · A. crispa · A. cyclophylla · A. cylindrica · A. debilis · A. decumbens · A. diandra · A. dichotoma · A. digera · A. dioica · A. echinata · A. echinocephala · A. elegantissima · A. elongata · A. excelsa · A. fasciculata · A. fauriei · A. ferruginea · A. ficoidea · A. filifolia · A. fischeri · A. flavicoma · A. frumentacea · A. frutescens · A. fruticosa · A. fruticosa var. pubescens · A. galapagensis · A. geminata · A. geniculata · A. glauca · A. glaucescens · A. globosa · A. glomerata · A. gracilis

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal February 01, 2008:

Identifiers

Footnotes

  1. Kenneth R. Robertson "Achyranthes". in Flora of North America Vol. 4 Page 406, 435. Oxford University Press. Online at EFloras.org. [back]
  2. Bruegmann, M.M. & Caraway, V. 2003. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 19, 2008. [back]
Last Revised: 7/2/2009