378 JOURNAL OF THE ARNOLD ARBORETUM [vol. xxi 



Lythraceae 



Lagerstroemia Linnaeus 

 Merr, JAA 21: 378. 1940 

 Lag-erstroemia micrantha sp. nov. 



Arbor, ut videtur parva, inflorescentiis dense griseo-puberulis exceptis 

 glabra, ramis glabris, teretibus, ramulis 1-1.2 mm. diametro; foliis 

 firmiter chartaceis, oblongo-ovatis, olivaceis, subtus pallidioribus, 

 utrinque glabris, 4-8 cm. longis, 2-3.5 cm. latis, acuminatis, basi 

 latissime acutis vel subrotimdatis, nervis primariis utrinque circiter 6, 

 subtus distinctis, elevatis; petiolo l-l mm. longo; paniculis terminalibus, 

 multifloris, 7-10 cm. longis, subpyramidatis, dense cinereo-puberulis, 

 multifloris; floribus minutis, pedicellatis, pedicellis 1-2 mm. longis; 

 calycibus utrinque glaberrimis, circiter 2.5 mm. longis, tubo cupulato, 

 haud corniculato, obscure 12-costato, costis vix elevatis, lobis 6, anguste 

 triangulari-ovatis vel triangulari-oblongis, plus minusve acuminatis, 1.2 

 mm. longis; petalis crispule undulatis, limbo subelliptico, 3 mm. longo, 

 2 mm. lato, unguibus gracilibus, 1.2 mm. longis; staminibus numerosis, 

 filamentis circiter 5 mm. longis; ovario subgloboso, glabre, stylo 5 mm. 

 iOngo. 



Indo-China: Annam, Quang Binh Province, Kim Bang village, 

 Pételot J74J, June 1930. 



A species strongly characterized by ils unusually small flowers, the 

 calyces of which are entire'y glabrous within and without, and rather 

 obscurely 12-costate, the costae scarcely elevated, not at ail winged, the 

 tube not appendaged. In accordance with Gagnepain's arrangement of 

 the Indo-Chinese species it falls in the group with Lagerstroemia indica 

 Linn. but is totally unrelated to that species. The flowers are exceed- 

 ingly small for the genus. 



