Erysimum gaudanense

Moazzeni, Hamid, Zarre, Shahin, Assadi, Mostafa, Joharchi, Mohammad Reza & German, Dmitry A., 2014, Erysimum hezarense, a new species and Rhammatophyllum gaudanense, a new record of Brassicaceae from Iran, Phytotaxa 175 (5), pp. 241-248 : 246

Relationship of R. gaudanense to geographically and morphologically close taxa

Despite being morphologically close to Afghan taxa, R. gaudanense readily differs from all of them. Most distinct R. afghanicum has wider fruits, (2.5) 3–4.5 mm wide, seeds broadly winged all round, yellow petals and indumentum of predominantly subdendritic trichomes. The other two species have indumentum similar to R. gaudanense but their pedicels are usually divaricate and somewhat curved. Besides, in R. flexuosum , the fruits are very gradually (vs. more or less abruptly) narrowed towards both ends and strongly stipitate (with gynophores 1–3 mm long) and in R. ghoranum , the leaves are flat (not plicate) and the seeds are winged all round ( Rechinger 1968, Botschantzev 1987, Al-Shehbaz & Appel 2002). Botschantzev (1966, 1987) also separated R. gaudanense from other species by pubescent petals but Kamelin (2002) found that this is typical also for E. pseudoparrya ( Botschantzev & Vvedensky 1948: 8) Al- Shehbaz & O. Appel (2002: 3) ( Kyrgyzstan and Tajikistan) and this character is to be checked in Afghan taxa. Finally, distribution of R. gaudanense is rather distinct.