|
Diacrodon compressus
|
Borreria spinosa
|
Borreria verticillata
|
Stem pubescence |
Glabrous to glabrescent |
Glabrescent to pubescent with papillae or long hairs in the angles |
Glabrous to glabrescent, rarely winged |
Leaf shape and dimension |
Narrowly elliptic to narrowly obovate 8-50 × 2-7 mm |
Linear to narrowly obovate 12-65 × 2-15 mm |
Narrowly elliptic to elliptic 13-40 x 2-30 mm |
Leaf pubescence |
Glabrous or glabrescent in the middle vein |
Glabrescent and with papillae in the middle vein |
Glabrous and with papillae in the middle vein |
Stipular sheath pubescence and bristles number |
Glabrescent 6-8 bristles |
Puberulous or pubescent 5-8 bristles |
Glabrous or puberulous 5-7 bristles |
Glomerules |
1 apical until 3 axillary, the apical hemispherical |
1 apical until 5 axillary, the apical hemispherical |
1 apical until 3 axillary, the apical spherical |
Calyx lobes |
2 |
2 or 4 |
|
narrowly triangular |
spatulate |
|
scabridulous or ciliate 1.5-2.3 mm long |
glabrous or pilose in the base 0.9-2.3 mm long |
puberulous in the margin 0.4-1.2 mm long |
Hypanthium pubescence |
Pilose in the upper part |
Pilose in the upper part |
Puberulous in the upper part |
Corolla |
Infundibuliform |
Campanulate |
|
2.5-4 mm long |
3-4 mm long |
1.5-3.2 mm long |
Stamens and stigma position |
Exserted |
Exserted |
Exserted |
Stigma |
Shortly bifid 1.92-2.87 mm long Papillae covering only the inner surface |
Bilobed 1.96-2.76 mm long Papillae covering the entire surface |
Shortly bifid 2.11-3.89 mm long Papillae covering only the inner surface |
Nectariferous disc cells |
Isodiametric and uniform |
Conical, some with a greater length, like a finger-form and not uniform |
Isodiametric and uniform |
Capsule |
Cuneiform to obovate, laterally compressed to the septum 2.1-3.5 × 1.2-1.7 mm Indehiscent or tardily dehiscent Pilose at the upper part |
Subglobose, narrowly obovate to obovate 1.6-2.7 × 0.96-1.4 mm Dehiscent Pubescent at the upper part |
Globose to subglobose, ovate to obovate 0.89-2.10 × 0.75-1.36 mm Dehiscent Puberulous or pubescent at the upper part |
Valves dehiscence |
Indehiscent |
Dehiscent |
Dehiscent or indehiscent |
Number of seed per fruit |
1 or 2 |
2 |
2 |
Seed |
Narrowly elliptic 1.77-1.97 x 0.25-0.45 mm |
Elliptic to obovate 1.49-1.71 x 0.49-0.68 mm |
Obovate 0.96-1.11 x 0.39-0.52 mm |
Ventral groove |
Narrowly elliptic (136-140 µm widht) |
Wide (156-200 µm widht) |
|
Reticulate-foveate |
Reticulate-foveate |
Reticulate-foveate |
Testa |
Tetragonal and isodiametric to elongated longitudinally at the center cells; anticlinal wall slightly straight; periclinal wall striate and cleaved |
Isodiametric cells; anticlinal wall slightly straight; periclinal wall smooth |
Pollen |
6-7 zonocolporate, oblate-spheroidal (P= 16.5-22.6 μm, E= 19.15-25.92 μm) |
7 zonocolporate, oblate-spheroidal (P= 28-30 μm; E= 30-34 μm) |
6-8 zonocolporate, oblate-spheroidal (P= 20.2-23.5 μm; E= 21.2-26) |
|
Tectate-perforate, spinulate exine |
Tectate-perforate, spinulate exine |
Tectate-perforate, spinulate exine |
Distribution |
Brazil and Paraguay |
Wide distribution in America, from Mexico to Argentina |
Wide distribution in America, from United State to Argentina, and introduced in Africa |