Table 4.

Relation of characters studied for species included in Types III and IV (IV_A, IV_B)

Seed type or subtype	Taxon	Seed shape	Seed size (mm)	Cell shape	Depth of anticlinal walls	Thickness of anticlinal walls	Narrow trough
III	O. cumana	Oblongoid	0·36–0·50 × 0·16–0·25	Tangentially elongated or irregular	Medium (Fig. 2B)	Even	Evident all around the edge
	O. densiflora	Ovoid to ellipsoid	0·27–0·43 × 0·17–0·27	Isodiametric to tangentially elongated	Medium (Fig. 2A)	Even	Evident all around the edge
	O. santolinae	Ellipsoid to ovoid	0·26–0·48 × 0·16–0·29	Isodiametric to irregular	Remarkable (Fig. 2C)	Even	Evident all around the edge
IVA	O. arenaria	Ovoid to ellipsoid	0·35–0·58 × 0·23–0·38	Isodiametric	Medium	Even	More evident at the vertices
	O. latisquama	Ellipsoid to ovoid	0·30–0·45 × 0·18–0·28	Isodiametric	Slight (Figs. 2D, E)	Even	Evident all around the edge
	O. nana	Ovoid to ellipsoid	0·29–0·51 × 0·17–0·30	Isodiametric to irregular	Medium	Even	More evident at the vertices
	O. ramosa	Ellipsoid to ovoid	0·33–0·52 × 0·19–0·33	Isodiametric	Medium (Fig. 2F)	Uneven	More evident at the vertices
IVB	O. lavandulacea	Ovoid to oblongoid	0·32–0·52 × 0·18–0·38	Isodiametric	Remarkable (Fig. 2I)	Uneven	More evident at the vertices
	O. mutelii	Ovoid	0·35–0·53 × 0·21–0·35	Isodiametric to irregular	Remarkable	Even	More evident at the vertices
	O. olbiensis	Ellipsoid to ovoid	0·28–0·61 × 0·17–0·41	Isodiametric	Slight	Uneven	More evident at the vertices
	O. purpurea	Ellipsoid to ovoid	0·36–0·48 × 0·19–0·31	Isodiametric	Medium (Fig. 2G)	Even	More evident at the vertices
	O. schultzii	Ellipsoid to ovoid	0·39–0·57 × 0·26–0·38	Isodiametric to tangentially elongated	Remarkable (Fig. 2H)	Uneven	More evident at the vertices
	O. tunetana	Ellipsoid to globose	0·28–0·37 × 0·22–0·30	Isodiametric	Medium	Even	More evident at the vertices