Flora of the Hawaiian Islands
Dicotyledon Literature for Richardia brasiliensis
Wagner et al., 1990, 1999.
   Rubiaceae -- The Coffee Family Bibliography
      Richardia brasiliensis
General Information
DistributionApparently native to South America, now widely naturalized.In the Hawaiian Islands, naturalized on Kaua`i, O`ahu, Lana`i, Maui, Hawai`i.

Annual or short-lived perennial herbs; stems prostrate or occasionally ascending, rarely rooting at the lower nodes, 2-4 dm long, hirsute.
Leaves elliptic to ovate, 1.6-4(-7.5) cm long, 0.8-2 cm wide, scabrous, apex acute to obtuse, base attenuate, petioles 0.1-1 cm long, stipular sheath ca. 2 mm wide, setae 1.5-5 mm long.
Flowers 20 or more in heads, involucral leaves in 1-2 pairs, sterile axillary flowers rarely also present; calyx usually 6-lobed, the lobes 1.5-3.5 mm long, glabrous or scabrous, margins ciliate; corolla white or rarely rose, funnelform, (4-)6-lobed, the tube 3-8 mm long, the lobes 1-3 mm long, with tufts of hairs on the lobes; ovary 3-celled.
Mericarps 2-3, broadly obovoid, 2.5-3(-4) mm long, abaxial face papillose and strigose, adaxial face with a median ridge, glabrous.
2n = 28, 84