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Mascarene Island leaf-flower

abnormal leaflower, Drummond's leaf-flower

Habit Herbs, annual, monoecious, 2–5 dm; branching phyllanthoid. Herbs, annual, sometimes becoming woody and then appearing to be perennial, monoecious, 1–5 dm; branching phyllanthoid.
Stems

main stems terete, not winged, glabrous or scabridulous; ultimate branchlets subterete, not winged, glabrous or scabridulous.

main stems persistent, terete, not winged, glabrous or scabridulous; ultimate branchlets deciduous, subterete, not winged, glabrous or scabridulous.

Leaves

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.

on main stems spiral, scalelike;

stipules not auriculate, pale reddish brown.;

leaves on ultimate branchlets distichous, well developed;

stipules not auriculate, greenish white;

blade elliptic to oblong, 3–10 × 1–4 mm, base cuneate to subcordate, apex obtuse to emarginate, both surfaces glabrous or scabridulous.

Inflorescences

cymules or flowers solitary, proximal bisexual with 1–2 pistillate flowers and 2–3 staminate flowers, distal with 1 pistillate flower.

cymules, proximal staminate with 2 flowers, distal bisexual with 1 pistillate flower and 1–3 staminate flowers.

Pedicels

staminate 0.5–1.5 mm, pistillate flexuous, capillary, and pendent in fruit, (2.5–)3–8 mm.

staminate 0.7–1.5 mm, pistillate spreading in fruit, (1–)1.5–3(–3.5) mm.

Staminate flowers

sepals 5, white except green midrib, flat, 0.4–0.7 mm;

nectary extrastaminal, 5 glands;

stamens 5, filaments distinct.

sepals 5–6 in basal cymules, 4 in distal cymules, pale yellowish green, sometimes suffused with red, flat, 0.5–1 mm;

nectary extrastaminal, 4(–6) glands;

stamens 2(–3 in basal cymules), filaments connate throughout.

Pistillate flowers

sepals 5, white except green midrib, flat, 0.6–0.8 mm, 1-veined;

nectary annular, unlobed.

sepals 5–6, green with nearly white margins, flat, (0.5–)0.7–1.1 mm, 1-veined;

nectary 3 glands (2-fid distally, thus resembling 6 glands).

Capsules

1.7–1.9 mm diam., smooth.

2.3–2.7 mm diam., smooth.

Seeds

uniformly brown, 0.8–0.9 mm, evenly papillate.

uniformly brown, 1.1–1.5 mm, longitudinally ribbed.

2n

= 26.

Phyllanthus tenellus

Phyllanthus abnormis

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
from FNA
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]
[WildflowerSearch map]
[BONAP county map]
from FNA
FL; NM; OK; TX; ne Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

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.)

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Pistillate nectary glands strongly unequal, spatulate, as long as or longer than broad; leaf blades glabrous on both surfaces or sparsely to moderately scabridulous abaxially; bisexual cymules with 1 staminate flower.
var. abnormis
1. Pistillate nectary glands subequal, reniform, broader than long; leaf blades densely scabridulous on both surfaces; bisexual cymules with 1–3 staminate flowers.
var. riograndensis
Source FNA vol. 12, p. 340. FNA vol. 12, p. 343.
Parent taxa Phyllanthaceae > Phyllanthus Phyllanthaceae > Phyllanthus
Sibling taxa
P. abnormis, P. acidus, P. amarus, P. angustifolius, P. caroliniensis, P. ericoides, P. evanescens, P. fluitans, P. fraternus, P. liebmannianus, P. niruri, P. pentaphyllus, P. polygonoides, P. urinaria, P. warnockii
P. acidus, P. amarus, P. angustifolius, P. caroliniensis, P. ericoides, P. evanescens, P. fluitans, P. fraternus, P. liebmannianus, P. niruri, P. pentaphyllus, P. polygonoides, P. tenellus, P. urinaria, P. warnockii
Subordinate taxa
P. abnormis var. abnormis, P. abnormis var. riograndensis
Name authority Roxburgh: Fl. Ind. ed. 1832, 3: 668. (1832) Baillon: Adansonia 1: 42. (1860)
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