Flora of the Hawaiian Islands
Dicotyledon Literature for Phyllostegia ambigua
Wagner et al., 1990, 1999.
   Lamiaceae -- The Mint Family Bibliography
      Phyllostegia ambigua
General Information
DistributionIn the Hawaiian Islands, endemic to Moloka`i, Maui, Hawai`i.

Click here for detailed USGS map by Jonathan Price
Scandent subshrubs or lianas; stems densely to sparsely villous, pilose, or antrorsely strigose, glabrate with age.
Leaves somewhat thick and chartaceous or relatively thin and membranous, ovate to elliptic, (6.5-)11-16 cm long, (2-)4.5-7 cm wide, upper surface glabrate to sparsely appressed villous, pilose, or puberulent, occasionally only along veins, lower surface densely villous (hairs sometimes somewhat appressed), puberulent, or glabrate, margins crenate to serrate-crenate, sometimes shallowly so, apex obtuse to acute, occasionally acuminate, or rarely rounded, base broadly to narrowly cuneate, petioles (2.1-)2.5-4 cm long, villous primarily along lateral margins to evenly villous or glabrate.
Flowers 6-18 per verticillaster, in unbranched, elongate, racemose inflorescences 5-16 cm long, pedicels 6-30 mm long, densely villous, antrorsely strigose, or glabrate, not glandular-dotted, bracts elliptic to narrowly ovate, 15-30 mm long, lowermost pair larger, 30-75 mm long, pubescence same as that of leaves; calyx narrowly obconical, (6-)7-11 mm long at anthesis, pubescence same as that of pedicels, sometimes confined to prominent nerves, the teeth oblong to narrowly or broadly deltate, sometimes unequally divided, 2-4 mm long, apex rounded to acute; corolla white, occasionally tinged pink, tube 12-14 mm long, sparsely pubescent to glabrate, upper lip 8-15 mm long, emarginate to deeply 2-lobed, lower lip 16-19 mm long.
Nutlets ca. 8-12 mm long.