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Electronic Flora of South Australia genus Fact Sheet

Family: Chenopodiaceae
Dysphania

Citation: R. Br., Prod. Fl. Nov. Holl. 411 (1810).

Derivation: Greek dysphanes, scarcely visible; referring to the very small flowers.

Synonymy: Not Applicable

Common name: None

Description:
Annual or short-lived perennial herbs with subsessile glands or simple and gland-tipped hairs, aromatic; leaves alternate, simple, entire or variously dissected.

Inflorescence of compact clusters of flowers, axillary, spicoid or paniculate in arrangement; flowers ebracteate, minute, bisexual (rarely male) and female; perianth-segments 1-4 (3 or 4 in terminal bisexual flowers of each glomerule), free or united towards the base; limb cucullate and often inflated or spongy; stamens 1 or 2; disk absent; ovary ellipsoid; stigmas 1 or 2, linear, delicate.

Pericarp extremely thing seed erect to horizontal, globular to ellipsoid or laterally compressed; testa crustaceous, smooth; embryo lateral or basal, situated beneath a groove (embryo-groove); radicle inferior or superior.

Distribution:  10 species all endemic to mainland Australia.

Biology: No text

Key to Species:
1. Perianth-segments 1-3
 
2. Flowers in axillary clusters
 
3. Perianth-segments united at the base and shed with the seed enclosed
D. glomulifera 1.
3. Perianth-segments free; seed and perianth-segments shed separately
 
4. Seed strongly flattened laterally (usually slightly twisted), more or less obovate; pericarp almost smooth
D. platycarpa 4.
4. Seed ellipsoid, obovoid, or lenticular; pericarp smooth or glandular-papillate
D. glomulifera 1.
2. Flowers in spike-like inflorescences
 
5. Perianth-segments free, rounded or inconspicuously keeled on the back
D. plantaginella 3.
5. Perianth-segments united into a hard cup-shaped tube in the lower half, prominently (and horizontally) keeled
D. simulans 6.
1. Perianth-segments 4
 
6. Plant prostrate or decumbent, with several stems arising from the base; seed glossy, compressed-globular; inflorescence slender, spicate
D. kalpari 2.
6. Plant erect, with one main stem; seed dull (rarely glossy), almost globular; inflorescence paniculate
D. rhadinostachya 5.

Author: Not yet available


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