Flora of the Hawaiian Islands
Dicotyledon Literature for Geniostoma helleri
Wagner et al., 1990, 1999.
   Loganiaceae -- The Logania Family Bibliography
      Geniostoma helleri
General Information
DistributionHawaiian Islands.In the Hawaiian Islands, endemic to Kaua`i.

Click here for detailed USGS map by Jonathan Price
HabitatDiverse mesic forests and mesic valleys
Elevation240-1190 m
Shrubs 2-4.5 m tall, sometimes climbing; stems terete, ± divaricately branched, glabrous.
Leaves membranous, oblanceolate to elliptic or sometimes elliptic-ovate, 5-14 cm long, 1.7-4 cm wide, upper surface with veins scarcely impressed, inconspicuous, both surfaces glabrous, margins entire, flat, apex acute to short-acuminate, base broadly to narrowly cuneate, petioles 0.7-1.5 cm long, glabrous, stipules connate into a cup 1-5 mm long, closely appressed to the stem, glabrous, persistent.
Flowers 3-9 or more in pendulous or erect, compound, paniculate, glabrous cymes, peduncles 5-20 mm long, pedicels 6-9(-15) mm long, elongating to 10-30 mm long in fruit, bracts narrowly oblanceolate, margins ciliate, 1.2-1.5 mm long, bracteoles narrowly deltate to filiform, 0.5-1 mm long; calyx lobes ovate-deltate, 1.7-2.5 mm long, 0.8-1.3 mm wide, nerves inconspicuous, glabrous, margins scarious, minutely ciliate, apex acute; corolla white (1 observation) or pale greenish yellow (1 observation), 9-11 mm long, the tube narrowly urceolate, 7-8 mm long, the lobes narrowly deltate, 2-3.5 mm long, involute toward apex, apex acute, white pilose on the tube within and on lower part of lobes; ovary glabrous.
Capsules whitish green, lanceoloid to ovoid, 9-20 mm long, 2(3)-valved, valves longitudinally striate, not keeled, apex with a beak 0.7-1.2 mm long.