in species of Selena subgenus Hypoporum and subgenus Scleria (Sclerieae-Cypcraceae).
(shape and size of branches) as well as floral bract, sepal and petal venation, are variable in populations of Hechtia lepidophylla.
mira when compared to the taxa included in Chevaliera are related to the inflorescence structure
and the texture of the bracts: the numerous and densely arranged branches are flabellate (vs.
In fact, variation of inflorescence structure
Recent taxonomic work has maintained Hitchcock's original concepts of cylindric, contracted, spike-like yellow and green foxtail inflorescence structure
(Great Plains Flora Association, 1991; Holm et al.
Comparison of the inflorescence structure
in Koyamaea and related
Indeed, Bentham and Hooker (1880) placed the dasypogonoids (plus some other taxa now firmly placed in the lilioid order Asparagales) within the Poalean family Juncaceae, citing similarities in inflorescence structure
The main problems in the interpretation of the inflorescence structure
result from studies which did not consider the entire inflorescence (Vegetti, 2003); instead, attention was restricted to the position and arrangement of flowers in the final units of the often copiously branched inflorescence (Kukkonen, 1984).
One of the characters they analyzed was the partial inflorescence structure
, for which they recognized only two states: there may be present only fertile flowers and modified sterile flowers.
1 and 2): (1) Gross Inflorescence Structure
(unispicate, 0; occasionally unispicate, 1; multispicate, 2; highly compound, 3); (2) Degree of Utricle Fusion (closed, 0; open, 1); (3) Spikelet Sexuality (one-flowered pistillate, 0; bisexual, but monoecious, 1; perfect, 2); (4) Stigma Number (three, 0; two, 1); (5) Cladoprophylls (present, 0; absent, 1); (6) Inflorescence Prophylls (present, 0; absent, 1).
Evolution in the Myrtaceae--Evidence from inflorescence structure
Observed heterochronic differences in the inflorescence structure
may be divided into three types: spatial difference s in the relationship between the unit inflorescence and the subtending leaf (hysteranthy); differences in the time of formation and/or the duration of whole axes; and changes in development pathways, leading to shoot dimorphism.