These trees (especially third from top, and first) could look natural and like the right kind of tree. Color is good.
Tree illustrations vector | Free Stock Vector Art & Illustrations, EPS, AI, SVG, CDR, PSD
Art of Nikolas Ilic: Tree Designs!
Tree Watercolor Illustrations- when I have time ! Do with pen and ink combine
Árboles / Doodle trees
Guestbook Tree Illustration by Anne Herbst, via Behance
Waldland limitierte Auflage Giclee print von EloiseRenouf auf Etsy
Trees Screen Print by Eloise Renouf More
Green Tree Watercolor Art 8 x 10 Print, Love Birds, Tree Illustration, Modern Wall Decor, Circles, Polka Dots (168) on Etsy, $15.00