Grass Morphology and Systematics. I. The Internode

Systematics of Disakisperma (Poaceae, Chloridoideae, Chlorideae)

“…The culm anatomy of Disakisperma dubium was discussed briefly by Canfield (1934) and Brown et al (1959). The cross-section shown in Valls (1978, see fig.…”

Description of the Family, Vegetative Morphology and Anatomy

“…Variation in the internal anatomy of the internode may be taxonomically diagnostic, although it is highly homoplasious (GPWG 2001), and is probably most useful at the level of genus and species. Most Pooideae tend to have hollow internodes, whereas other subfamilies are more variable (Brown et al 1959a). Clearly the oft-repeated jingle "sedges have edges, and rushes are round, and grasses are hollow right to the ground" is a serious over-simplification.…”

“…Clearly the oft-repeated jingle "sedges have edges, and rushes are round, and grasses are hollow right to the ground" is a serious over-simplification. Pooideae tend to have wider hollows than other taxa, but the ecological and evolutionary significance of hollow internodes is unknown; Brown et al (1959a) suggest a correlation of hollow internodes with moist habitats. Genetic studies in durum wheat show that having a solid stem is dominant to hollow stem, and that the trait is controlled by a single locus (Houshmand et al 2007).…”

Coherence of proposed tribal and subfamilial characteristics in Phalaris (Gramineae)

“…The 0.05/î I.P.C. treatment suggested by Al-Aish and Brown (1958) was used. This treatment is discussed in detail by Al-Aish (1956) and con sists essentially of soaking-dry caryopses in a 0.05% aqueous I.P.C.…”

“…• -The internodes of 133 species from 80 genera of grasses "were examined by Brown et al (1959a). Data on an additional 57 species and 5 genera "were obtained from the literature.…”