An updated synopsis of Tanaecium (Bignonieae, Bignoniaceae) Author Frazao, Annelise Author Lohmann, Lucia G. text PhytoKeys 2019 132 31 52 http://dx.doi.org/10.3897/phytokeys.132.37538 journal article http://dx.doi.org/10.3897/phytokeys.132.37538 1314-2003-132-31 EE9337EAE191555593FFACFB65C7A5FE 3472174 1. Tanaecium affine (A.H.Gentry) L.G.Lohmann. Ann. Missouri Bot. Gard. 99: 464. 2014. Arrabidaea affinis A.H.Gentry, Novon 2(2): 159. 1992. Type: Ecuador. Sucumbios: Lake Agrio, banks of lake, 250 m, 0°6'45.28"N , 76°54'42.81"W , 1 Apr. 1980, J. Brandbyge and E. Asanza 30393 (holotype, MO [MO-083145]!; isotypes, AAU image!, AAU photo at MO!, NY [NY00000106]!). Habitat and distribution. Tanaecium affine is known from humid forests with rich soils, although it has been collected in primary and secondary forests with lateritic soil in Peru (Loreto, Mayanas). It is native from Bolivia (La Paz), Colombia (Antioquia, Boyaca), Ecuador (Napo, Pastaza, Sucumbios ), and Peru (Amazonas, Junin , Loreto, Pasco, Puno). Phenology. Flowering: February to April, September and November; fruiting: February to December. Notes. This species is morphologically similar to Fridericia florida but differs by the bilabiate calyces, stems with conspicuous patelliform trichomes in the interpetiolar region, and occurrence in rich soils ( Gentry 1992 ). In addition, T. affine can also be recognized by the numerous peltate trichomes distributed throughout the leaflets, emarginated membrane-like domatia, and fields of patelliform trichomes that cover the inflorescence nodes. Tanaecium affine shares vegetative traits with Tanaecium tetragonolobum , a sympatric species (Tab. 1 ). However, T. tetragonolobum can be differentiated by the glabrous leaflets (vs. leaflets covered with peltate trichomes in T. affine ), petioles longer than petiolules (vs. petioles shorter than petiolules in T. affine ), and subulate prophylls of the axillary buds (vs. bromeliad-like prophylls of the axillary buds in T. affine ). Table 1. Characters useful to recognize Tanaecium species.

Tanaecium species		Branchlet section	Interpetiolar glandular field	Prophylls of the axillary buds	Tendril type	Inflorescence type	Calyx shape	Calyx aperture	Corolla color	Corolla mouth color	Corolla shape	Ovules series	Fruit shape	Seeds wings
1.	Tanaecium affine	terete or tetragonal	present	subulate or bromeliad-like	simple	compound thyrse	campanulate	bilabiate	white	white	infundibular	one	linear	well-developed
2.	Tanaecium apiculatum	terete	absent	subulate or bromeliad-like	absent	raceme	tubular	truncate	white	white	wide infundibular	many	-	-
3.	Tanaecium bilabiatum	terete	absent	subulate or bromeliad-like	simple	thyrse	campanulate or tubular	bilabiate	white	yellow	infundibular	one	linear	vestigial
4.	Tanaecium caudiculatum	tetragonal	absent	subulate or bromeliad-like	simple	thyrse	campanulate	truncate	pale yellow	white	campanulate	one	linear	well-developed
5.	Tanaecium crucigerum	terete	present	minute and triangular or bromeliad-like	simple	thyrse	cupular	truncate	white	white	wide infundibular	many	elliptic	absent
6.	Tanaecium cyrtanthum	terete	present	minute and triangular or bromeliad-like	simple	thyrse	cupular	truncate	white	white	wide infundibular	many	linear	well-developed
7.	Tanaecium decorticans	terete	present	subulate	trifid	thyrse	campanulate or cupular	truncate	pink	white	infundibular	one	linear	well-developed
8.	Tanaecium dichotomum	terete	present or absent	subulate or bromeliad-like	simple	thyrse	campanulate	bilabiate	pink	white	campanulate or infundibular	one	linear	well-developed
9.	Tanaecium duckei	terete	absent	subulate	trifid	thyrse	tubular	oblique	white	white	wide infundibular	many	linear	well-developed
10.	Tanaecium exitiosum	terete	absent	subulate	simple	thyrse	campanulate	bilabiate	white	white	wide infundibular	-	-	-
11.	Tanaecium jaroba	terete	present	minute and triangular or bromeliad-like	simple	thyrse	campanulate	truncate	white	white	wide infundibular	many	elliptic	absent
12.	Tanaecium kuhlmannii	terete	absent	subulate	trifid	thyrse	tubular	oblique	white	white	wide infundibular	many	linear	well-developed
13.	Tanaecium neobrasiliense	terete	absent	subulate or bromeliad-like	trifid	compound thyrse	campanulate	truncate	magenta	-	infundibular	two	linear	well-developed
14.	Tanaecium parviflorum	terete or tetragonal	absent	subulate or bromeliad-like	simple	thyrse	campanulate	truncate	white	yellow	infundibular	two	linear	well-developed
15.	Tanaecium pyramidatum	terete	absent	subulate or bromeliad-like	bifid or trifid	compound thyrse	campanulate	bilabiate or truncate	pink or magenta	white	infundibular	one	linear	well-developed
16.	Tanaecium revillae	terete	absent	subulate or bromeliad-like	simple	thyrse	campanulate	bilabiate	pink	white	infundibular	one	linear-oblong	vestigial
17.	Tanaecium selloi	terete	absent	minute and triangular or foliaceous	simple	thyrse	campanulate	bilabiate	pink	white	infundibular	one	linear	well-developed
18.	Tanaecium tetragonolobum	terete or tetragonal	present	subulate	simple	thyrse	cupular	truncate	white	yellow	infundibular	many	linear	well-developed
19.	Tanaecium tetramerum	terete	absent	subulate or bromeliad-like	absent	fascicule	tubular	truncate	white	white	hypocrateriform	two	elliptic	well-developed
20.	Tanaecium truncatum	terete	present	subulate or bromeliad-like	trifid	thyrse	campanulate	oblique or truncate	pale yellow	yellow	infundibular	two	linear	well-developed
21.	Tanaecium xanthophyllum	terete	present	minute and triangular or bromeliad-like	trifid	compound thyrse	campanulate	bilabiate	yellow	yellow	infundibular	two	linear	well-developed