Passiflora jussieui Feuillet, Journal of the Botanical Research Institute of Texas 4(2): 611, f. 1. 2010.

Mezzonato-Pires, Ana Carolina, Milward-de-Azevedo, Michaele Alvim, Mendonca, Claudia Barbieri Ferreira & Goncalves-Esteves, Vania, 2018, Taxonomy, palynology and distribution notes of seven species of Passiflora L. (Passifloraceae s. s.) newly recorded from Brazil, PhytoKeys 95, pp. 1-14 : 5

Passiflora jussieui Feuillet, Journal of the Botanical Research Institute of Texas 4(2): 611, f. 1. 2010. Figs 2E, F , 3E, F

Descriptions.

Lianas; tendrils slightly robust, glabrous to slightly puberulous. Stipules not seen. Petioles with two glands on the terminal end of the adaxial side. Blades 15-23 × 8.4-12.7 cm, coriaceous, ovate to ovate-oblong to oblong to widely oblong, apex acuminate, base truncate to round, glabrous on both sides; margins conspicuous, undulate, brown to brownish-green, glandular, with 2-3 glands; 16-23 pairs of secondary veins, arcuate. Bracts diminute, linear-setaceous, alternate. Flowers arranged in a racemose inflorescence, hypanthium cylindrical; sepals linear-oblong, greenish; petals linear-oblong, white with lilac spots; corona with 4-6 series of filaments, greenish-yellow with dark red to purplish spots, filaments of first series subdolabriform, straight, laterally attached, filaments of second, third and fourth series with linear-capitate, straight, filaments of fifth series linear-capitate to hair-like, semi-straight or reflexed, filaments of sixth series hair-like, reflexed; operculum straight, tubular, membranous, exserted, apex crenulate; trochlea absent on the androgynophore; ovary narrowly oblongoid to narrowly ovoid, densely velutine. Fruits not seen.

Palynology.

Pollen grains large-sized (ca. 67.6 µm), prolate spheroidal, 6-colporate, colpi short, narrow, three endoaperture lalongate (ca. 5.5 × 9.2 µm) unique for each pair of ectoaperture, sexine partially tectate as small pieces of remnant muri can be observed; muri (ca. 2.8 µm) duplicolumellate, columellae high, apparent, without perforations and most of the tectum surface curved or with spines (ca. 4.8 × 4.6 µm), not forming lumina. A large part of the surface is ornamented with sparsely distributed bacula and conspicuous pila (Fig. 3E, F ).

Specimens examined.

BRAZIL. Acre: Cruzeiro do Sul: Reserva Extrativista do Alto Juruá, Rio Jurua , Seringal Sao Joao , placing Tapaúna, [7°37'52"S, 72°40'12"W], 14 Mar 1992 [fl], D.C. Daly et al. 7423 (INPA, UPCB) . Rondônia: Serra do Balaterio, 7 km from the village Campo Novo , 10°35'0S, 63°39'0"W, 24 Apr 1987 [fl], C.A. Cid et al. 8915 (INPA) .

Distribution and ecology.

It is known to occur in French Guiana, Suriname and Brazil, being also cultivated at the ORSTOM Botanical Garden in Cayenne, in the UK by R.J.R. Vanderplank ( Feuillet 2010) and in the USA by L. Gilbert. It is recorded for the states of Acre (municipality of Cruzeiro do Sul) and Rondônia (municipality of Porto Velho). According to Feuillet (2010), P. jussieui can be found growing in lowland rainforests, whereas in Brazil, it is found in Floresta de Terra Firme formations, in sandy and rocky soils.

Taxonomic comments.

Passiflora jussieui belongs to P. subg. Astrophea sect. Capreolata J.M.MacDougal & Feuillet. It can be characterised by its leaf-blades with conspicuous margins, flowers with corona arranged in 4-6 filament series with dark red to purplish spots, the outer series with subdolabriform filaments, the inner series with linear-capitelate and straight filaments and the sixth series with hair-like and reflexed filaments. The pollen grains of the closely related P. cerradensis Sacco present semitectate exine and reticulate sexine with large and ornamented lumina; which differ greatly from the mostly non-tectate exine, not producing lumina, pollen grains of P. jussieui . The pollen grains of P. jussieui are included in the type II pollen group, while the ones of P. cerradensis are included in the type III pollen group ( Mezzonato-Pires et al. 2017).

Figures

Figure 2. Illustrations of leaves and flowers in longitudinal section. A, B Passiflora amoena (S. V. Costa Neto et al. 2818, HAMAB) C, D Passiflora fuchsiiflora (S. Sakagawa et al. 248, INPA) E, F Passiflora jussieui (D. C. Daly et al. 7423, UPCB) G, H Passiflora ovata (S. Sakagawa et al. 668, INPA) I, J Passiflora plumosa (C. A. Cid et al. 561, MG) K, L Passiflora quelchii (R. C. Forzza et al. 8321, RB) M, N Passiflora tessmannii (C. A. Sothers & E. C. Pereira 612, INPA).

Figure 3. Photomicrographs and electron photomicrographs of pollen grains of the species of Passiflora. A, B Passiflora amoena C, D Passiflora fuchsiiflora E, F Passiflora jussieui G, H Passiflora ovata I, J Passiflora quelchii K, L Passiflora tessmannii A, C, E, G, K general aspect of polar view B, F, H, I, L general aspect of equatorial view, D and J ornamentation detail. Scale bars: 10 µm (C, E, F, G, H, I, K, L); 5 µm (A, B, J); 1 µm (D).