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Rhexiaor

Rhexiaor

Rhexia

The CEO of Rhexia, a content marketing platform for businesses, discusses how to refine your content for maximum performance, and why content has to be consistently interesting and reliable to be a compelling and engaging marketing strategy.Rhexia species are herbaceous perennials. Opposite leaves are simple, ovate to lanceolate and have the typical acrodromous venation (prominent arcuate nerves) characteristic of the Melastomataceae. Stems have four faces; one set is broader and convex, the other set is narrower, concave. Flowers are actinomorphic (radially symmetrical), 2–3 cm in diameter, pink-purple to white, (yellow in R. lutea), petals 4, sepals 4, stamens 8. Bright yellow anthers are long and curved counterclockwise. Seeds are cochleate (noncochleate in R. alifanus).

Rhexia

Nesom (2012) recognized 13 species within Rhexia by treating two tetraploid R. mariana var. ventricosa and R. mariana var. interior as specific rank based on allopatric distribution and distinct stem morphology of these entities. The Nesome's classification divides Rhexia into four sections: (1) Sect. RHEXIA (R. aristosa, R. salicifolia, R. virginica, R. interior, R. ventricosa, R. mariana, R. cubensis, R. nashii, R. parviflora; (2) Sect. CYMBORHEXIA (R. alifanus); (3) Sect. BREVIANTHERA (R. petiolata, R. nuttallii; and (4) Sect. LUTEORHEXIA (R. lutea). Most common species of Rhexia in Louisiana. All species of meadowbeauty have opposite, mainly three-nerved leaves and showy four-petaled flowers with large yellow stamens. Other species include R. lutea which has yellow flowers; Rhexia petiolata which is slender with hairless stems; Rhexia alifanus, a large pink flowered species with untoothed leaf margins, thick spongy roots, and flowers that are darker pink than R. mariana; Rhexia virginica, which has sharply toothed leaf margins on elliptic to ovate leaves and is also quite large.

Similar species: Rhexia virginica is our only species in this genus and family in the Chicago Region, but in southern Indiana two other species of Rhexia occur. The more similar of those two species, R. interior, differs by having the stem angles only scarcely winged or not at all winged, thus the stem appears more square in cross section, plus the stem, leaves, and hypanthium are much more bristly and stiff-hairy. The other species, R. mariana, has stem sides that are quite dissimilar, with two opposing sides being broad, dark green, and convex, while the other two opposing sides are much narrower, pale, and concave. Perhaps another superficially similar taxon to R. virginica in the Chicago Region is Sabatia angularis, but that species has more pale flowers (light rosey-pink) with five sepals and petals, non-toothed leaves that often clasp the stem, and light green or straw-colored stems that are normally bushy with many opposite branches above. (Source: swbiodiversity.org)

 

 

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