The best approximation in answer to their question is as yet supplied by the three cauline
non auriculate) middle and upper cauline leaves, narrowly winged fruiting pedicels pubescent all around (vs.
5 cm, persistent, only slightly flattened at base; blade oblanceolate, 2-5 mm wide, entire or serrulate, puberulent at margin; lowermost cauline leaves shortly petiolate to subsessile, not auriculate at base; middle and upper cauline leaves entire or few toothed, oblong, minutely auriculate at base.
Basal leaves not seen; middle cauline
leaves sessile or short petiolate, linear or linear-lanceolate, 3-8 cm x 2-7 mm, entire or rarely dentate; uppermost leaves sessile, narrower, entire.
llatasii); cauline leaves long petiolate (petiole 1-7 cm long); plants 1-8 m tall (sometimes shorter in some plants of P.
Basal leaves sessile, rosulate, simple, entire, awl-shaped or linear and grass-like, thick, parallel-veined; cauline leaves sessile, not auriculate at base, similar to basal ones but smaller, glabrous or pubescent.
It is suggested that the nature of the primary vascular system indicates that this plant had a relatively low degree of organ differentiation and that it constituted a primitive branching axis exhibiting an early stage of foliar and cauline
Plants subscapose; cauline
leaves absent; fruits linear-oblong S.
as well as bracteose, cauline
leaves that are sessile on the rhizome,
Our analyses suggest that ancestral Gunnera was a small, sympodially branching, cauline
herb, producing axes in the axils of its leaves, lacking stolons, and with isophyllous, opposite leaves.
Carter; with entire rosette and cauline
leaves (Prince &
Sigiliaria was a tree about 15 m tall, with both terminal and cauline
lateral branches, and Chaloneria was a small-bodied s hrub about 0.
Branches vascularized by two bundles that are derived from cauline
bundles that flank the orthostichy of the subtending leaf: 0 = absent; 1 = present.
and foliar endodermis usually remains at stage 1, advances to stage 2 in a few species, but rarely reaches stage 3.
A more subtle disagreement concerns the nature of the earliest stage of leaf development and the related question of the boundary between foliar and cauline
tissues at the base of the leaf primordium.