Pollen Morphology and Biosystematics of the Subfamily Papilionoideae (Leguminosae)

Evolutionary Significance of the Loss of the Chloroplast‐dna Inverted Repeat in the Leguminosae Subfamily Papilionoideae

“…Evidence used to group these two tribes with other temperate tribes comes largely from their herbaceous growth habit and associated characters (e.g., a closed vascular system and stipules adnate to the petiole; Polhill, 1981a) and a center of diversity in temperate regions of the Old World. Loteae and Coronilleae together share many presumably derived features, such as specialized pollen (Polhill, 1981c;Ferguson and Skvarla, 1981), seedlings with exceptionally long and narrow cotyledons, and a suppressed plumule (Duke and Polhill, 1981), and a base chromosome number of x = 7.…”

Pollen wall stratification trends inUlex(Genisteae, papilionoideae: Leguminosae) in the Iberian Peninsula

“…Pollen grains with a granular infratectum are widespread in primitive and morphologically specialized tribes of Papilionoideae (Stainier & Horvat 1978;Ferguson & Skvarla 1981, 1983, 1988Ferguson 1984;Guinet & Ferguson 1989). Genisteae (sensu Polhill 1976) mainly comprises derived temperate shrubby plants (Polhill 1981).…”

Pollen morphology and phylogenetic analysis ofEperuaAublet (Detarieae: Caesalpinioideae: Leguminosae)

“…Guinet & Ferguson (1989) considered that exine structure is the most important pollen character for phylogenetic interpretations in the Leguminosae. Wall strati®cation has been found to be useful for indications of relationship in the Papilionoideae (Ferguson & Skvarla 1981, 1982, 1983, and the importance of exine strati®cation in the Caesalpinioideae is emphasised by the survey of Ferguson (1987). Within Eperua there is considerable variation in exine strati®cation; overall and relative thicknesess of foot layer, infratectum and tectum, eveness of thickness over grain, and absence or presence of supratectal structures, foramina and MCL.…”

“…A reduction in aperture length towards pores, with an associated increase in apocolpium and change to oblate shape, is regarded as specialisation in the Papilionoideae (Guinet & Ferguson 1989, Ferguson & Skvarla 1981, Ferguson 1984) and thought by many other palynologists to be a derived feature (e.g. Batten 1986), although reversals back to a spheroidal shape have been documented (Van Campo 1976).…”