Mecardonia acuminata

(Walter) Small

Fl. S.E. U.S., 1065, 1337. 1903.

Common names: Axilflower
Selected by author to be illustratedEndemic
Basionym: Gratiola acuminata Walter
Synonyms: Bacopa acuminata (Walter) B. L. Robinson
Treatment appears in FNA Volume 17. Treatment on page 273. Mentioned on page 274.
Revision as of 15:02, 18 September 2019 by FNA>Volume Importer

Stems erect, 10–60 cm, glandular. Leaves glandular; blade 9–30 × 6–10 mm, 1–2 times bracts, margins weakly serrate. Pedicels divaricate or ascending, 6–22 mm. Flowers: calyx lobes unequal; corolla white with purple veins in throat, adaxial lobes connate 1/2–2/3 lengths, abaxial lip not prominent; stamens distally adnate to corolla. Capsules 6–7 mm. Seeds 40–60, black, radial walls of reticulum smooth.

Distribution

c, e United States.

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Stems branched from bases and diffuse; fruiting pedicels ascending, 1–2 times bracts. Mecardonia acuminata var. peninsularis
1 Stems branched from middles, rarely diffuse; fruiting pedicels divaricate, 1/2–2 times bracts. > 2
2 Fruiting pedicels 17–35 mm, 1–2 times bracts. Mecardonia acuminata var. acuminata
2 Fruiting pedicels 10–18 mm, 1/2–1 times bracts. Mecardonia acuminata var. microphylla