Flora of the Hawaiian Islands
Dicotyledon Literature for Bobea sandwicensis
Wagner et al., 1990, 1999.
   Rubiaceae -- The Coffee Family Bibliography
      Bobea sandwicensis
General Information
DistributionIn the Hawaiian Islands, endemic to O`ahu, Moloka`i, Lana`i, Maui.

Rubiaceae - Bobea sandwicensis

Click here for detailed USGS map by Jonathan Price
Trees up to 10 m tall; young branches ca. 2 mm in diameter toward apex, sericeous-puberulent.
Leaves chartaceous to subcoriaceous, ovate to lanceolate or elliptic, (3-)6.5-11.5 cm long, (1.5-)3.5-7 cm wide, secondary nerves 5-8 on each side of midrib, glabrous except lower surface sparsely appressed pubescent on midrib and secondary nerves, domatia present as depressions in axils of secondary nerves, apex acute to acuminate, base obtuse to rounded, subcordate, or rarely acute, petioles 5-15 mm long, stipules deltate to lanceolate, valvate in bud, 3-5 mm long, 2-4 mm wide, abruptly acuminate, upper surface villous, lower surface appressed sericeous.
Flowers perfect or functionally unisexual, 4(5)-merous; staminate and perfect flowers 3-7 in cymes, peduncles 6-25 mm long, ca. 1 mm wide, calyx limb cupular, broadly lobed, the tubular portion 2-3 mm long, pubescent, the lobes foliaceous, imbricate, often reflexed, often unequal, 2-6 mm long, 2-7 mm wide, obtuse to broadly rounded, pubescent, corolla salverform, the tube 5-11 mm long, 1.2-2 mm wide, appressed pubescent externally, subglabrous within, the lobes ovate, ca. 3 mm long and wide, obtuse, stamens inserted below corolla throat, anthers sessile, ca. 3.5 mm long, ca. 0.5 mm wide, ovary usually abortive, up to 3 mm long, 2-3-celled, style subterete, 3-4.5 mm long, appressed strigillose, stigmas 2-3, equal or unequal, ca. 0.6 mm long; pistillate flowers solitary or rarely 2-3 in cymes, peduncles 8-20(-35) mm long, calyx limb as in staminate flowers, corolla salverform, the tube 5-7 mm long, up to 1.5 mm wide, staminodia subsessile, ca. 1.5 mm long, ca. 0.5 mm wide, ovary up to 3.5 mm long, 5-6-celled, style 4-7 mm long, densely pubescent, stigmas 5-6, linear, slightly unequal, 1.3-2.5 mm long, exserted.
Fruit subglobose, 6-10 mm in diameter, sparsely pubescent, pyrenes (2-)5-6.