Very pleasant 'pen and ink' feel to these photos. Nice work.
Number 3 for me.Just out of interest, I know it's a Pachypodium, possibly Pachypodium geayi?TIA
I made a small 200mm x 200mm print of number 3 on Hahnemuhle Museum Etching with Piezography (Cone Inks) and I can't keep my hands and eyes off it!