Turnera

Linnaeus

Sp. Pl.1: 271. 1753

Gen. Pl. ed.5, 131. 1754

Common names: Turnera
Etymology: For William Turner, 1515 – 1568, English botanist
Found in FNA Volume 6. Treatment on page 167. Mentioned on page 165, 168.
Herbs, subshrubs, or shrubs [trees], hairs glandular and simple [stellate], glandular hairs sessile-capitate or microcapitate. Leaves petiolate or sessile, often with nectaries; stipules present or absent. Inflorescences axillary; peduncle free or adnate to petiole (flowers epiphyllous); prophylls persistent. Pedicels absent. Flowers mostly distylous; sepals at least 1/3 connate; petals yellow or white [salmon, pink, orange, or red], sometimes with dark basal spot; corona absent; filaments often with nectaries; anthers dorsifixed or basifixed. Capsules granulose, rugose, or verrucose [smooth]. Seeds reticulate [striate]. x = 5, 7, (13).

Distribution

sc, se United States, Mexico, West Indies, Central America, South America, Africa.

Discussion

Species 142 (3 in the flora).

I. Urban (1883) divided Turnera into nine series, and M. M. Arbo (2008) added two. Phylogenetic studies (S. Truyens et al. 2005; Arbo and S. M. Espert 2009) indicate that it is monophyletic.

Turnera subulata Smith, with a dark basal spot in the yellow petals, has been collected twice, probably as a garden escape, in Miami-Dade County, southern Florida.

Key

1 Leaves: petiole without nectaries, blade margins revolute; inflorescences 0.5–0.8 cm, not epiphyllous; filaments adnate for 0.2 mm to base of floral tube, anther pockets absent; anthers dorsifixed. Turnera diffusa
1 Leaves: petiole with nectaries, blade margins not revolute; inflorescences 2–4 cm, epiphyllous; proximal part of filaments adnate by margins to floral tube forming 5 nectar pockets; anthers basifixed > 2
2 Flowers distylous; petals white. Turnera coerulea
2 Flowers homostylous; petals yellow. Turnera ulmifolia
Facts about "Turnera"
AuthorMaría Mercedes Arbo +
Common nameTurnera +
EtymologyFor William Turner, 1515 – 1568, English botanist +
IllustratorLinny Heagy +
Referencearbo2000a +, arbo2005a +, arbo2008a +, arbo2009a +, arbo2011a + and truyens2005a +
Taxon nameTurnera +
Taxon parentTurneraceae +
Taxon rankgenus +
VolumeVolume 6 +