Trianthema

Linnaeus

Sp. Pl. 1: 223. 1753.

,

Gen. Pl. ed. 5, 105. 1754.

Common names: Horse-purslane
Etymology: Greek treis, three, and anthemon, flower
Treatment appears in FNA Volume 4. Treatment on page 82. Mentioned on page 75, 76, 77.
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 TaxonIllustrator 
FNA4 P15 Cypselea humifusa.jpegCypselea humifusa
Trianthema portulacastrum
Aptenia cordifolia
Barbara Alongi
Barbara Alongi
Barbara Alongi

Herbs [shrubs], annual or perennial, glabrous, hairy, or papillate. Roots fibrous. Stems usually prostrate, spreading, branched from base, sometimes woody. Leaves cauline, subopposite, petiolate, those of each pair unequal; stipules attached to margin of petiole, bidentate, usually papery; blade terete or flat, linear to orbiculate, base tapered, margins entire. Inflorescences axillary, flowers solitary or in cymes; bracts foliaceous; bracteoles 2. Flowers inconspicuous, 4 mm diam.; calyx lobes 5, adaxial surface colored, with subapical, abaxial, mucronate appendages; petals and petaloid staminodia absent; stamens perigynous, 5–10 [–20], when 5, alternating with calyx lobes; pistil 2-carpellate; ovary superior, 1–2-loculed; placentation basal; ovules 1–12; styles 1–2, longitudinally papillate; stigmas 2. Fruits capsules, dehiscence circumscissile near base; operculum flat, ovoid, or globose, winged or mucronate. Seeds 1–12, brown to black, ridged, triangular, globose, or reniform, smooth or papillate; arils elongate.

Distribution

North America, Mexico, West Indies, Central America, South America, Asia, Africa, Australia

Discussion

Species 20 (1 in the flora).

Selected References

None.

... more about "Trianthema"
abaxial +  and subapical +
elongate +
Wayne R. Ferren Jr. +
Linnaeus +
tapered +
flat linear +  and orbiculate +
appendaged +, hooded +  and petaloid +
Horse-purslane +
North America +, Mexico +, West Indies +, Central America +, South America +, Asia +, Africa +  and Australia +
Greek treis, three, and anthemon, flower +
4 cm40 mm <br />0.04 m <br /> (?) +
inconspicuous +
campanulate +  and tubular +
indehiscent +, circumscissile +, dehiscence +, septicidal +  and loculicidal +
subopposite +
unequal +
mucronate +, globose +, ovoid +  and flat +
1 +  and 12 +
connate +  and distinct +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
brown +  and black +
papillate +  and smooth +
reniform +, globose +, triangular +  and ridged +
connate +  and distinct +
perigynous +
mat-forming +
underground +
adnate +  and free +
bidentate +
connate +  and distinct +
papillate +
Trianthema +
Aizoaceae +
perennial +  and annual +
hairy +  and glabrous +