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Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Distribution in Egypt

Nile region (Qalioubia, Nile Delta).

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Global Distribution

Central America, naturalized in tropical east and west Africa.

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Physical Description

Morphology

Description

Herbs, annual, 15-20 cm tall. Root fibrous, 0.8-1 mm. Stems many from base, ascending or suberect, rarely prostrate, ca. 1 mm thick, usually glabrous, rarely with a few hairs when young. Leaves opposite; stipules interpetiolar, truncate, 0.7-0.9 mm, shallowly lacerate; petiole 1.5-2 mm; leaf blade oblong-elliptic, 0.7-3 cm × 0.3-1.2 mm, thickly papery, base slightly oblique, asymmetric, subrounded, margin sparsely crenate, apex obtuse, adaxially with a few purple spots. Cyathia axillary and terminal, single or in small cymes, peduncle to 4 mm; involucre narrowly campanulate, ca. 0.8 × 0.4-0.5 mm, glabrous, marginal lobes 5, triangular; glands 4, yellow-green, rounded to transversely elliptic, appendages white or pale pink, wider than glands, to 0.7 × 0.5 mm, margin entire to slightly undulate. Male flowers 5-15, exserted; anthers red. Female flower pedicellate, exserted from involucre; ovary smooth, glabrous; styles free; stigma slightly 2-lobed. Capsule 3-angular-ovoid, 2-2.5 × ca. 2.5 mm, smooth, glabrous; fruiting pedicel ca. 2 mm. Seeds ovoid-tetragonal, ca. 1.1 × 0.8 mm, blackish, each side with 3 or 4 transverse furrows; caruncle absent. Fl. and fr. Jan-Apr.
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Type Information

Isotype for Euphorbia hyssopifolia var. pubescenticocca Christenhusz
Catalog Number: US 3329301
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): M. J. Jansen-Jacobs, B. Welle, H. J. M. Sipman & V. James
Year Collected: 1992
Locality: Rupununi District, Kusad Mountains., Guyana, South America
Microhabitat: Savanna.
Elevation (m): 150 to 250
  • Isotype: Christenhusz, M. J. 2002. Harvard Pap. Bot. 7: 6.
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Isosyntype for Euphorbia hypericifolia var. falciformis Klotzsch
Catalog Number: US 702503
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Pressed specimen
Collector(s): M. R. Schomburgk
Locality: Guyana, South America
  • Isosyntype: Klotzsch, J. F. 1843. London J. Bot. 2: 42.
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Isotype for Euphorbia jonesii Millsp.
Catalog Number: US 293461
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): M. E. Jones
Year Collected: 1884
Locality: Arizona, United States, North America
  • Isotype: Millspaugh, C. F. 1890. Pittonia. 2: 89.
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Holotype for Euphorbia stenomeres S.F. Blake
Catalog Number: US 989628
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): S. F. Blake
Year Collected: 1919
Locality: Along trail from Los Amates to Izabal., Izabal, Guatemala, Central America
  • Holotype: Blake, S. F. 1922. Contr. U.S. Natl. Herb. 24: 13.
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Ecology

Habitat

Cultivated ground, naturalized.

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Habitat & Distribution

Disturbed areas along railways and roads. Hainan, Taiwan (Gaoxiong, Tainan, Taizhong) [New World; naturalized in the Old World].
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Life History and Behavior

Life Expectancy

Annual.

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Euphorbia hyssopifolia

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N5 - Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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