Flora of the Hawaiian Islands
Literature for Tetramolopium humile
Wagner et al., 1990, 1999. Literature for Tetramolopium humile subsp. haleakalae
Wagner et al., 1990, 1999. Literature for Tetramolopium humile subsp. humile
Wagner et al., 1990, 1999.
   Asteraceae -- The Sunflower Family Bibliography
      Tetramolopium humile
General Information
Gynomonoecious, cespitose, dwarf shrubs 8-20 cm tall; stems branched at base, densely glandular, somewhat resinous pilose or hispidulous.
Leaves linear-oblanceolate or oblanceolate to spatulate, 10-25 mm long, 0.8-3 mm wide, densely glandular hispidulous, margins entire, apex obtuse, petiolate.
Heads solitary or 5-7 in corymbose-paniculate inflorescences, peduncles 2-3.5 cm long, capitate glandular, bracts linear-subulate; involucre cylindrical, 7-9 mm high, 5-7 mm in diameter, bracts (22-)24-45, the inner ones often purple-tipped, linear or linear-lanceolate, densely capitate glandular or very sparsely strigose in subsp. humile, scarious hyaline-margined, narrowly so in outer bracts, entire or fimbriate at apex, acuminate; receptacle 1.2-1.4 mm in diameter; ray florets (13-)20-30(-36) per head, in a single series, rays white or tinged lavender, 2.9-3.3 mm long, 0.7-0.9 mm wide; disk florets perfect, 7-24 per head, corollas pink to purple, rarely yellow, tubular, 6.5-7.5 mm long, the tube 3-4 mm long; pappus dull yellowish brown, stout, 5.5-7(-8) mm long, longer than involucre.
Achenes fusiform-cylindrical, 3.3-4(-4.5) mm long, 0.7-0.8 mm wide, densely glandular and strigose, some glands large and globose, containing a resinous substance, faces obscurely 1-nerved basally or nerveless.
2n = 18*