Richardia brasiliensis Gomes

First published in Mem. Ipecacuanha Bras.: 31 (1801)
This species is accepted
The native range of this species is Ecuador to N. Argentina. It is an annual or subshrub and grows primarily in the seasonally dry tropical biome.

Descriptions

Rubiaceae, B. Verdcourt. Flora Zambesiaca 5:1. 1989

Morphology General Habit
Perennial (or ? annual) prostrate herb, often forming a mat, from a central taproot; stems 7–40 cm. long, densely covered with spreading hairs.
Morphology Leaves
Leaf blades 1–6.5 x 0.4–2.7 cm., elliptic, acute or subacute at the apex, very narrowly attenuated to the base, the apparent petiole up to 1.5 cm. long, mostly with short hairs all over the upper surface and on the margins and nerves beneath; basal narrowed part with longer hairs; stipular sheath 1–3.5 mm. long, with 3–5 fimbriae, 1–4 mm. long, usually with long hairs.
Morphology Reproductive morphology Inflorescences
Inflorescences 0.7–1.2 cm. in diam.; bracts ovate-elliptic, rounded at the base, the long ones 1.5–3.5 x 0.65–2 cm., the short ones 1–1.7 cm. x 4–9.5 mm., or sometimes lacking, with a similar indumentum to that on the leaves, save that there are much longer hairs towards the base; basal part of bracts often subhyaline.
Morphology Reproductive morphology Flowers Calyx
Calyx tube 1.2–1.7 mm. long; lobes 5–6, 1–1.5 x 0.3–1 mm., ovate-triangular, the margins conspicuously ciliate, basal united part of the limb 0.5–1 mm. long.
Morphology Reproductive morphology Flowers Corolla
Corolla white often tinged pink, 2.7–3.2 mm. long; lobes 4–6, 1–1.4 x 0.5–0.8 mm.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Style 3–4 mm. long, the branches 0.2–0.5 mm. long; stigmas 0.2–0.3 mm. long, spathulate.
Morphology Reproductive morphology Fruits
Cocci brown, 2–2.6 x 1.4–1.6 mm., oblong-obovoid, inner face with smooth depressed area (i.e. actual septum of ovary) almost as broad as the face, dorsal face covered with short flat hairs which are longer in the middle or a mixture of papilla-like hairs and longer hairs.
Morphology Reproductive morphology Seeds
Seeds brown, 2.5 x 1.8 mm., compressed oblong-obovoid, with ventral face Broadly grooved, with 2 short basal projections 0.1 mm. long.
[FZ]

Rubiaceae, F. N. Hepper & R. W. J. Keay. Flora of West Tropical Africa 2. 1963

Morphology General Habit
A hairy, branched prostrate herb with stems up to a foot long
Morphology Reproductive morphology Flowers
Flowers white
Note
Introduced weed.
[FWTA]

Rubiaceae, B. Verdcourt. Flora of Tropical East Africa. 1976

Morphology General Habit
Perennial (or ? annual) prostrate herb, often forming a mat, from a central taproot; stems 7–40 cm. long, densely covered with spreading hairs.
Morphology Leaves
Leaf-blades elliptic, 1–6.5 cm. long, 0.4–2.7 cm. wide, acute or subacute at the apex, very narrowly attenuated to the base, the apparent petiole up to 1.5 cm. long, mostly with short hairs all over the upper surface and on the margins and nerves beneath; basal narrowed part with longer hairs; stipular sheath 1–3.5 mm. long, with 3–5 fimbriae, 1–4 mm. long, usually with long hairs.
Morphology Reproductive morphology Inflorescences
Inflorescences 0.7–1.2 cm. in diameter; bracts ovate-elliptic, rounded at the base, the long ones 1.5–3.5 cm. long, 0.65–2 cm. wide, the short ones 1–1.7 cm. long, 4–9.5 mm. wide, or sometimes lacking, with a similar indumentum to that on the leaves, save that there are much longer hairs towards the base; basal part of bracts often subhyaline.
Morphology Reproductive morphology Flowers Calyx
Calyx-tube 1.2–1.7 mm. long; lobes 5–6, ovate-triangular, 1–1.5 mm. long, 0.3–1 mm. wide, the margins conspicuously ciliate, basal united part of the limb 0.5–1 mm. long.
Morphology Reproductive morphology Flowers Corolla
Corolla white, 2.7–3.2 mm. long; lobes 4–6, 1–1.4 mm. long, 0.5–0.8 mm. wide.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Style 3–4 mm. long, the branches 0.2–0.5 mm. long; stigmas spathulate, 0.2–0.3 mm. long.
Morphology Reproductive morphology Fruits
Cocci brown, oblong-obovoid, 2–2.6 mm. long, 1.4–1.6 mm. wide, inner face with smooth depressed area (i.e. actual septum of ovary) almost as broad as the face, dorsal face covered with short flat hairs which are longer in the middle or a mixture of papilla-like hairs and longer hairs.
Morphology Reproductive morphology Seeds
Seeds brown, compressed oblong-obovoid, 2.5 mm. long, 1.8 mm. wide, with ventral face broadly grooved, with 2 short basal projections 0.1 mm. long.
Figures
Fig. 56/9.
Habitat
Gardens, roadsides, cleared areas in forest, grassland, etc.; 20–2000 m.
Distribution
K3 K4 T3 T6 U4 Z a South American species now widely naturalized
[FTEA]

Sources

  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of West Tropical Africa

    • Flora of West Tropical Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Science Photographs

    • Copyright applied to individual images