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as to what the boundaries of such tribes should be. Catalan, P., E.A. Kellogg, and R.G. Olmstead. 1997. Phylogeny of Poaceae subfamily Pooideae based on

sect. Inflexae, Limnanthes sect. Limnanthes R. Brown London Edinburgh Philos. Mag. & J. Sci. 3: 71. 1833. Nancy R. Morin Common names: Meadowfoam Etymology:

accepted (F. R. Fosberg 1978). Nyctaginaceae is believed to have been derived from Phytolaccaceae or a close common ancestor (A. Cronquist 1981), a relationship

Maas, P. J. M. 1985. 195. Cannaceae. In: A. R. A. Görts-van Rijn, ed. 1985+. Flora of the Guianas. Series A: Phanerogams. 1212+ volsfasc. Königstein.

legendary (R. C. Rollins 1941, 1993; G. A. Mulligan 1996). When the genus is split, most of the problematic taxa come to reside in Boechera. A rare confluence

see P. A. Cox (1988) and P. A. Cox and R. B. Knox (1989). The flowers are enclosed in a vegetative shoot that closely resembles a perianth (E. A. Johnson

consist of a stem in the proximal part (from base to node) and a leaf in the distal part (from node to apex). In Lemnaceae literature it is called a frond.

clones by means of rhizomes in the first season, flower the second season (R. R. Yeo 1964), and often form very large, persistent, often monospecific stands

1990; see also D.Steila, chap. 2; A.Graham, chap. 3; P.A. Delcourt and H.R. Delcourt, chap. 4; R.F. Thorne, chap. 5; M.G. Barbour and N.L. Christensen, chap

1976, 1981, 1983; W.A. Watts 1983; V.M. Bryant Jr. and R.G. Holloway 1985; R.B. Davis and G.L. Jacobson Jr. 1985; P.A. Delcourt and H.R. Delcourt 1987, 1987b;

Arcto-Tertiary geoflora (R.W. Chaney 1967; J.A. Wolfe 1972). The Succor Creek flora (A.T. Cross and R.E. Taggart 1982; A.Graham 1965; R.E. Taggart and A.T. Cross 198O)

Hutchinson (1926--1934 et seq.), K. R. Sporne (1949 et seq.), A. L. Takhtajan (1959 et seq.), R. F. Thorne (1963 et seq.), and A. Cronquist (1968 et seq.), have

Kramer and P.S. Green (1990), R.E.G. Pichi-Sermolli (1977), and R.M. Tryon and A.F. Tryon (1982). Historically, many fern genera have been established