Synopsis of Trichanthera (Acanthaceae: Ruellieae: Trichantherinae) Daniel, Thomas F. Proceedings of the California Academy of Sciences 2015 2015-04-15 62 1 1 23 [659,862,649,675] Magnoliopsida Acanthaceae Plantae Lamiales 1 2 Tracheophyta subTribe Trichantherinae     1a. Calyx 3-lobed; corolla throat conspicuously gibbous-saccate ventrally; seeds 12–24 per capsule; pollen pantoforate.............................................  Louteridium  1b. Calyx 5-lobed; corolla throat sometimes ampliate but not conspicuously gibbous-saccate ventrally; seeds up to10 per capsule; pollen loxodicolporate............................ 2   2a. Corolla subcylindric (or at least with the tube subcylindric and elongate; or if with a ± ampliate throat as sometimes in  Suessenguthia multisetosa, then with flowers borne in headlike involucres subtended by several pairs of bracts); fertile stamens 2 or 4................. 3  2b. Corolla ± campanulate (i.e., throat ampliate; flowers not borne in headlike involucres as described above); fertile stamens 4............................................. 5   3a. Fertile stamens 2.....................................................  Sanchezia  3b. Fertile stamens 4............................................................ 4   4a. Thecae awned at base..............................................  Suessenguthia  4b. Thecae awnless.................................................  Trichosanchezia   5a. Thecae awnless, rounded at base; capsule pubescent at maturity; flowers borne on pedicels 2–11 mmlong; stigma 1.5– 4.5 mmlong...............................  Trichanthera  5b. Thecae awned with a single, subulate projection 0.3– 1 mmlong at base; capsule glabrous at maturity; flowers sessile or borne on pedicels to 2 mmlong; stigma to 1 mmlong.  Bravaisia