Mirabilis sect. Mirabilis
Herbs, perennial (annual); roots tuberous [swollen taproot]. Stems erect to decumbent, densely [sparsely] leafy, leaves ± evenly distributed. Leaves: basal leaves petiolate, larger; distal leaves short petiolate or sessile, smaller, margins entire. Inflorescences compact cymes in distal axils and terminal; involucres slightly accrescent, narrowly bell-shaped, each with 1 flower inserted at base. Flowers: perianth [short] long funnelform, tubes narrow, limb abruptly flared, deeply 5-lobed; stamens 5. Fruits with 5 low ribs or blunt angles, ellipsoid to obovoid, base prominently constricted, apex rounded to nipplelike, surface of fruit smooth or low tuberculate, glabrate to puberulent, not mucilaginous when wetted.
sw United States, Mexico, n Central America, Mirabilis jalapa is widely
Species ca. 10 (2 in the flora).
"thin" is not a number.