COMPARISONS: Annularia sphenophylloides has anisophyllous verticils with a larger number of leaves (12 to 18) that are spatulate, with a distinct mucron on the rounded apex.
also displays anisophyllous verticils with similar number of leaves, but these are linear-lanceolate, much longer (up to 85 mm) and show a distinct cell pattern.
Verticils anisophyllous to a varying extent, with lateral leaves longer than those parallel to the axis.
Annularia jongmansii is characterized by anisophyllous verticils with lanceolate leaves showing a subrounded apex that includes a tiny mucron.
anisophyllous verticils with leaves showing a more acute apex than in Annularia radiata).
She also noted that Annularia acicularis has anisophyllous leaf verticils, in contrast to the isophyllous verticils of Annularia radiata.
Annularia latifolia has anisophyllous leaf verticils with smaller, oblanceolate leaves topped by an obtuse, mucronate apex.
DIAGNOSIS: Anisophyllous verticils flattened in spread out condition; 20-24 linear-lanceolate leaves, up to 85 mm long and 1.
DESCRIPTION: Ultimate axes 2-5 mm wide, with internodes 16-45 mm apart bearing slightly overlapping verticils which are flattened in spread-out condition; anisophyllous (slightly elliptical), with the lateral leaves longer than those situated in lower and upper parts.
Annularia spinulosa also possesses slightly anisophyllous verticils with a similar number of leaves, but these are shorter (around 30 mm), lanceolate, with bluntly pointed apices; length/breadth ratio is lower.