Phyllanthus caroliniensis |
Phyllanthus tenellus |
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Carolina leaf-flower |
Mascarene Island leaf-flower |
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Habit | Herbs, annual or perennial, without caudex or rhizomes, monoecious, 1–4.5 dm; branching not phyllanthoid. | Herbs, annual, monoecious, 2–5 dm; branching phyllanthoid. | ||||
Stems | terete, not winged [narrowly winged], glabrous or scabridulous. |
main stems terete, not winged, glabrous or scabridulous; ultimate branchlets subterete, not winged, glabrous or scabridulous. |
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Leaves | distichous; all well developed; stipules auriculate, pale brown or reddish brown; blade elliptic or oblong to obovate, 5–20(–30) × 2–10(–15) mm, base acute, apex obtuse to rounded and apiculate, both surfaces glabrous or scabridulous. |
on main stems spiral, scalelike; stipules not auriculate, reddish brown.; leaves on ultimate branchlets distichous, well developed; stipules not auriculate, pale green or pink with paler margins; blade elliptic to obovate, 6–25 × 4–11 mm, base acute to rounded, apex acute to obtuse, both surfaces glabrous. |
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Inflorescences | cymules, bisexual, with 1–3(–5) pistillate flowers and 1–2 staminate flowers. |
cymules or flowers solitary, proximal bisexual with 1–2 pistillate flowers and 2–3 staminate flowers, distal with 1 pistillate flower. |
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Pedicels | staminate 0.5–1 mm, pistillate sharply reflexed in fruit, 0.5–1(–1.5) mm. |
staminate 0.5–1.5 mm, pistillate flexuous, capillary, and pendent in fruit, (2.5–)3–8 mm. |
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Staminate flowers | sepals (5–)6, pale yellowish green, flat, 0.5–0.7 mm; nectary extrastaminal, 6 glands; stamens 3, filaments distinct. |
sepals 5, white except green midrib, flat, 0.4–0.7 mm; nectary extrastaminal, 5 glands; stamens 5, filaments distinct. |
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Pistillate flowers | sepals (5–)6(–7), green, often suffused with red, with scarious margins, flat, 0.6–1.4 mm, 1-veined; nectary cupular or annular, lobed or unlobed. |
sepals 5, white except green midrib, flat, 0.6–0.8 mm, 1-veined; nectary annular, unlobed. |
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Capsules | 1.6–2 mm diam., smooth. |
1.7–1.9 mm diam., smooth. |
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Seeds | uniformly brown, 0.7–1.1 mm, verrucose. |
uniformly brown, 0.8–0.9 mm, evenly papillate. |
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2n | = 36 (subsp. guianensis, West Indies). |
= 26. |
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Phyllanthus caroliniensis |
Phyllanthus tenellus |
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Phenology | Flowering and fruiting spring–fall (year-round in southern areas). | |||||
Habitat | Fields, gardens, roadsides, other disturbed areas, especially with sandy soils. | |||||
Elevation | 10–500 m. (0–1600 ft.) | |||||
Distribution |
AL; AR; DC; DE; FL; GA; IL; IN; KS; KY; LA; MD; MO; MS; NC; NJ; OH; OK; PA; SC; TN; TX; VA; WV; Mexico; Central America; South America; West Indies [Introduced in se Asia]
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AL; FL; GA; LA; MS; NC; SC; TN; TX; VA; Asia; Africa; Indian Ocean Islands [Introduced in North America; introduced also in Mexico, West Indies, South America, Atlantic Islands (Macaronesia), Pacific Islands, Australia]
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Discussion | Subspecies 4 (2 in the flora). Phyllanthus caroliniensis is the most widespread Phyllanthus in the flora area and in the Americas. In addition to the two subspecies in the flora, there are two others. Subspecies guianensis (Klotzsch) G. L. Webster, found in the West Indies, Central America, and northern South America, is similar to subsp. caroliniensis but distinguished by longer stipules (1.5–2 mm versus 0.8–12 mm) and staminate nectary glands that are longer than wide (versus as wide or wider than long). Subspecies stenopterus (Müller Arg.) G. L. Webster, of southern Central America and northern South America, is recognizable by its narrowly winged stems. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Phyllanthus tenellus is easily recognized by its long, capillary pistillate pedicels that are flexuous and pendent in fruit; it is native to the Mascarene Islands and perhaps to eastern Africa, other western Indian Ocean Islands, and the Arabian Peninsula, and is widely naturalized in tropical and subtropical regions worldwide. It appears to have been introduced into Florida in the 1920s and is continuing to spread. Phyllanthus tenellus has been reported from Arkansas (E. Sundell et al. 1999) and California as a nursery weed (G. F. Hrusa, pers. comm.), and from Oklahoma in flower beds (B. W. Hoagland, pers. comm.), and may be expected to become naturalized in those states. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 12, p. 339. | FNA vol. 12, p. 340. | ||||
Parent taxa | Phyllanthaceae > Phyllanthus | Phyllanthaceae > Phyllanthus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Walter: Fl. Carol., 228. (1788) | Roxburgh: Fl. Ind. ed. 1832, 3: 668. (1832) | ||||
Web links |