P. verticillata Forssk.
Section Sphondylia
Type specimen: Forsskal 353 resides at C (specimens C10002832, C10002833, C10002834) and BM (specimen BM000996831) and S (specimen
S-G-5052 ).
Evotrochis involucrata (syn)
Evotrochis odorata (syn)
P. x jenensis: P. verticillata × P. edelbergii
P. x kewensis: Gard. Chron. 27:130. 1900. , Figure A tetraploid hybrid found growing amongst plants of P. floribunda. The parentage is P. floribunda X P. verticillata. Breeds true.
Epithet: Named for the flowers arranged in whorls.
Distribution: Saudia Arabia, Yemen.
P. verticillata grows on wet, north facing, limestone cliffs in Saudia Arabia and Yemen. It is farinose, and differs from related species by having longer and narrower leaves, narrower bracts, a calyx cut to the base and a longer corolla-tube. See P. simensis which is a disjunct, heavily farinous species found in Ethiopia and maybe considered a subspecies of P. verticillata. P. verticillata crosses with P. floribunda and P. edelbergii. If you have an image of this species in the wild, please contact the webmaster.
