Flora of the Hawaiian Islands
Dicotyledon Literature for Desmodium tortuosum
Wagner et al., 1990, 1999.
   Fabaceae -- The Pea Family Bibliography
      Desmodium tortuosum

Common name(s): tick clover, tick trefoil, Florida beggarweed
General Information
DistributionNative to tropical and subtropical America, now widely naturalized in the Paleotropics.In the Hawaiian Islands, naturalized on Kaua`i, O`ahu, Moloka`i, Maui, Kaho`olawe, Hawai`i.

Erect herbs or subshrubs 5-20 dm tall; stems hooked pubescent.
Leaves trifoliolate, leaflets elliptic to ovate, terminal one 3-10 cm long, 1.5-5 cm wide, both surfaces appressed pubescent with minute hooked hairs, apex obtuse to acute, base cuneate to obtuse, petioles 1-5 cm long.
Flowers numerous in open, racemose inflorescences 3-8 cm long, occasionally these grouped into diffuse, paniculate inflorescences up to 25 cm long, rachis densely glandular pilose, less so with age, and puberulent with hooked hairs, pedicels slender, 10-15 mm long; corolla pink to bluish purple, 5-6 mm long.
Pods stipitate, (3-)5-7-jointed, (1.5-)2-3 cm long, pubescent with hooked hairs, articles usually orbicular to broadly elliptic, 3-4.5 mm long, 3-3.5 mm wide.
2n = 22