Richardia


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Richardia

 

(also Richardsonia), a genus of herbaceous plants of the family Rubiaceae. The plants have opposite leaves and thickened moniliform roots. The approximately ten species are all distributed in South America. The roots of R. brasiliensis and some other species, resemble ipecac uanha roots, and they were used to forge the latter.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
In the first season the top five dominant weed species in descending order were Galinsoga parviflora (53.16%), Eleusine indica (12.28%) Setaria verticillata (9.54%), Tagetes minuta (6.69%) and Richardia scabra (4.79%) (Table 4).
Influence of glyphosate timing and row width on palmer amaranth (Amaranthus palmeri) and pusley (Richardia spp.) demographics in glyphosate-resistant soybean.
(2003), studying coffee in competition with weeds, verified on average, 13.88 times more micronutrients in Richardia brasiliensis, in relation to the content found in coffee.
Also evaluated were several common weeds: creeping indigo, Indigofera spicata (Fabaceae); livid amaranth, Amaranthus blitum (Amaranthaceae); pokeweed, Phytolacca americana (Phytolaccaceae); American sicklepod, Senna obtusifolia (Fabaceae);wild poinsettia, Poinsettia heterophylla (Euphorbiaceae); white clover, Trifolium repens (Fabaceae); Old World diamond flower, Hedyotis corymbosa (Rubiaceae); Brazilian pusley, Richardia brasiliensis (Rubiaceae); and common ragweed, Ambrosia artemisiifolia (Asteraceae).
Myrtaceae Shrub Rhoicissus digitata (L.f.) Vitaceae Climber Gilg & Brandt * Richardia brasiliensis Gomes Rubiaceae Herb * Richardia humistrata (Cham.
These sex-related morphological differences have only been documented for species of Richardia Robineau-Desvoidy, especially those with antler-like genal process (Enderlein 1912; Wendt and Ale-Rocha, in press) and stalked-eyes, and for species of Megalothoraca Hendel and Batrachophthamum (Carvalho et al.