Pycnocycla saxatilis from SW Jordan and NW Saudi Arabia is described as a species new to science and illustrated. It is a stem-assimilant subshrub related to P. tomentosa and confined to crevices of smooth-faced sandstone and similar habitats. Attention is drawn to another undescribed and related Pycnocycla taxon from further south in Saudi Arabia.
References
Y. Bartov
1994: Geological photomap of Israel and adjacent areas; scale 1: 750 000, ed. 2. — Jerusalem. Google Scholar
A. Danin
1972: Mediterranean elements in rocks of the Negev and Sinai deserts. — Notes Roy. Bot. Gard. Edinburgh 31: 437–440. Google Scholar
A. Danin
1999a: Desert rocks as plant refugia in the Near East. — Bot. Rev. 65(2): 93–170. Google Scholar
A. Danin
1999b: Sandstone outcrops — a major refugium of Mediterranean flora in the xeric part of Jordan. —
Israel J. Pl. Sci.
47: 179–187. Google Scholar
I. Hedge
&
J. Lamond
1987:
Pycnocycla Lindl. — Pp. 72–80 in:
K. H. Rechinger
(ed.),
Flora iranica 162. — Graz. Google Scholar
H.-F. Jaubert
&
E. Spach
1847–50: Illustrationes plantarum orientalium 3. — Paris. Google Scholar
J. H. Powell
1989: Stratigraphy and sedimentation of the phanerozoic rocks of central and southern Jordan. Part A: Ram and Khrein groups. — Nat. Resources Authority Bull. (Amman) 11: 1–72. Google Scholar
