Tremandraceae DC. → Browse taxa…
This name is not current. Find out more information on related names.
Common name. Tremandra Family.
Habit and leaf form. Small shrubs, or herbs (slender subshrubs, or subherbaceous). ‘Normal’ plants, or switch-plants; sometimes with the principal photosynthesizing function transferred to stems. Leaves well developed, or much reduced, or absent. Perennial. Mesophytic, or xerophytic. Leaves minute, or small; alternate, or opposite, or whorled; ‘herbaceous’, or leathery, or membranous; imbricate (often), or not imbricate; petiolate to sessile; non-sheathing; simple. Leaf blades entire; flat, or rolled (often ericoid); one-veined, or pinnately veined; cross-venulate, or without cross-venules. Leaves without stipules (as usually interpreted, but often with glands in the stipular positions). Leaf blade margins entire, or dentate. Leaves without a persistent basal meristem. Stem anatomy. Nodes unilacunar. Secondary thickening developing from a conventional cambial ring.
Reproductive type, pollination. Fertile flowers hermaphrodite. Unisexual flowers absent. Plants hermaphrodite.
Inflorescence and flower features. Flowers solitary (axillary, slender-pedunculate), or aggregated in ‘inflorescences’; axillary. Inflorescences (when flowers grouped) axillary (with up to four flowers per axil). Flowers bracteate; small; regular; (3–)4 merous, or 5 merous; cyclic; tetracyclic (if the stamens are interpreted as one whorl). Free hypanthium absent. Hypogynous disk present, or absent. Perianth with distinct calyx and corolla; 6, or 8, or 10; 2 -whorled; isomerous. Calyx (3–)4–5; 1 -whorled; polysepalous (usually), or gamosepalous; valvate; regular; with the median member posterior. Corolla (3–)4–5; 1 -whorled; polypetalous; induplicate valvate; regular; white, or pink, or purple. Androecium 6 (rarely), or 8, or 10. Androecial members branched (this being a reasonable interpretation of the antepetalous pairs), or unbranched (as conventionally interpreted); free of the perianth; free of one another, or coherent; 4 - adelphous, or 5 - adelphous (interpreting the pairs as ‘bundles’). The androecial groups opposite the petals. Androecial members 1 -whorled (seemingly, though twice the corolla in number). Androecium exclusively of fertile stamens. Stamens 6 (rarely), or 8, or 10; diplostemonous; alternisepalous (in antepetalous pairs); all opposite the corolla members; erect in bud; filantherous (with short filaments). Anthers basifixed; non-versatile; dehiscing via pores (a single apical pore); four locular; tetrasporangiate; appendaged, or unappendaged. The anther appendages when present, apical. Gynoecium 2 carpelled. The pistil 2 celled. Carpels reduced in number relative to the perianth. Gynoecium syncarpous; eu-syncarpous; superior. Ovary plurilocular; 2 locular. Gynoecium median; stylate. Styles 1; apical. Placentation axile, or apical. Ovules 1–2(–5) per locule; pendulous; epitropous; with ventral raphe; arillate (usually), or non-arillate (Platytheca); anatropous.
Fruit and seed features. Fruit non-fleshy; dehiscent; a capsule. Capsules loculicidal, or septicidal and loculicidal. Seeds endospermic; winged (via a twisted appendage), or wingless. Cotyledons 2. Embryo straight. Seedling. Germination phanerocotylar.
Physiology, biochemistry. Aluminium accumulation not found.
Geography, cytology, number of species. World distribution: Australia. About 45 species.
TD Macfarlane, L Watson & NG Marchant
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Western Australian Herbarium (1998–). FloraBase—the Western Australian Flora. Department of Biodiversity, Conservation and Attractions. https://florabase.dpaw.wa.gov.au/