Passiflora series Quadrangulares, Feuillet & MacDougal, 2003

Koch, Ana Kelly, Cardoso, André Luiz De Rezende & Ilkiu-Borges, Anna Luiza, 2013, A new species of Passiflora subgenus Passiflora series Quadrangulares (Passifloraceae) from the Brazilian Amazon, Phytotaxa 104 (1), pp. 43-48 : 46

Key to species of Passiflora series Quadrangulares

1. Stems 4-angular, bracts ovate, corona with 4–6 series of filaments ............................................................................. 2

- Stems 3-angular, bracts ovate-triangular, corona with 7–12 series of filaments .......................................................... 4

2. Petioles with 2–8 glands ............................................................................................................................................... 3

- Petioles with only 2 glands ........................................................................................................... Passiflora phoenicea

3. Stipules ovate or ovate-lanceolate,> 1 cm wide, sepals not aristate .................................... Passiflora quadrangularis

- Stipules linear-lanceolate, <1 cm wide, sepal aristate .......................................................................... Passiflora alata

4. Leaves ovate, stipules ovate to narrowly oblong-ovate, petioles with 2 glands, corona with 10–12 series of filaments ........................................................................................................................................................... Passiflora trialata

- Leaves elliptic to obovate, stipules oblanceolate, petioles with 4 glands, corona with 7 series of filaments ................ ........................................................................................................................................... Passiflora longifilamentosa Passiflora longifilamentosa is closely related to P. trialata Feuillet & MacDougal (1996: 351) , as suggested by the 3-angular stems, the color and shape of sepals and petals, the 3-angular petioles and peduncles, and the single operculum. The new species differs however in the size and shape of stipules, petiole size, number and shape of petiole glands, size and shape of leaves, diameter of flowers, size and shape of bracts and, mainly in the number of corona series ( Table 1). Passiflora longifilamentosa has oblanceolate stipules, elliptic to obovate leaves, ovate to ovate-lanceolate bracts. In P. trialata stipules are ovate to oblong-ovate, leaves are ovate, and bracts are ovate-triangular.