Lagerstroemia spireana Gagnep.

De Wilde, Willem J. J. O. & Duyfjes, Brigitta E. E., 2016, Survey of Lagerstroemia L. (Lythraceae) in Indochina (excl. Thailand) with the description of Lagerstroemia densiflora, sp. nov., a new species from Vietnam, Adansonia 38 (2), pp. 241-255 : 252

18. Lagerstroemia spireana Gagnep. ( Fig. 9 )

Notulae Systematicae 3: 362 (1918) ; Flore générale de l’Indo-Chine 2: 951, fig. 102: 4 (1921). — Craib, Florae Siamensis Enumeratio 1: 726 (1931). — Furtado & Srisuko, Garden’s Bulletin Singapore 24: 321, fig. 51 (1969). — W.J. de Wilde et al., Flora of Thailand 11 (4): 575 (2014). — Type: Laos (Camkeut), Spire 326 (holo-, P[ P 05141587 !, Gagnepain’s drawing attached]).

SPOT- CHARACTERS. — Calyx tube and fruiting calyx tube with very well-developed winged ridges, 2-3 mm high; ovary hairy.

DISTRIBUTION. — Thailand, Laos.

NOTES

Lagerstroemia spireana resembles L. floribunda , the latter differs by unwinged low ridges. In NE Thailand Lagerstroemia spireana is grown as an ornamental lane tree.

Figures

FIG. 9. — Gagnepain’s drawing on flower details of the holotype of Lagerstroemia spireana Gagnep., Spire 326 (P05141587).