e-Key v3 - Staavia
SANBI Flora Keys Logo
Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Bruniaceae - Staavia Dahl

Description :

  • Shrubs erect to sprawling or dwarf, rarely with coppice shoots sprouting from a lignotuber
  • Leaves narrowly ovate to linear, abaxially deeply and prominently keeled; with a slender petiole; dark stipules present, later lost; bud leaf colleter slender to conical, later shrinking or lost
  • Flowers in dense capitula; bracts forming a radiating involucre, linear to ovate, the outer leaf-like, green, the inner often cream-white; bracteoles filiform; floral receptacle slightly to closely ribbed
  • Calyx with a tube; segments narrowly deltoid, up to half darkened from apex
  • Corolla white to deep mauve-pink; petals free, elliptic to sometimes oblong, entire to undulate or toothed, fitting tightly together and crested to form a cup covering edge of ovary
  • Stamens free from corolla, usually with a swelling near base matching petal crests, erect to incurving; anther thecae adnate; pollen grains with 4 or 5 colpi
  • Nectary 0; scent mostly not recorded, in one species faintly sweet
  • Ovary inferior to almost so; locules 1 or 2, if 2 then wall between locules sometimes incomplete; ovules 1 or 2 per locule or rarely an ovule lacking in one locule; ovules pendulous, often with a prominent caruncular cap; styles often swollen below, two branches connate, or connate nearly to apex with branches divergent, stigmas terminal
  • Fruit a 2-4-valved capsule with remains of flower parts
  • Seeds dark, usually with a basal elaiosome
  • x = 8, 11 (1 report, aneuploids)

Nomenclature:

  • Staavia Dahl
    • Dahl: 15 (1787)
    • Sonder: 321 (1862) in part
    • Pillans: 169 (1947)

Distribution & Notes:

  • Southern Africa : Species 9, Western Cape, mainly in the southwest

References:

  • DAHL, A. 1787. Observationes botanicae . Möller, Copenhagen
  • PILLANS, N.S. 1947. A revision of Bruniaceae . Journal of South African Botany 13
  • SONDER, O.W. 1862. Bruniaceae . Flora capensis 2