Marica. click here....

Adenium Socotranum (true) seed grown. 2yrs. of age.

Adenium "boehmianum" (seed grown).

Rick

Rick the leaves on the boehmianum seem huge, Are they that much bigger?

I think they're the largest among adenium if I remember correctly.

Dimmitt and Hanson 1992:

Adenium boehmianum

Adenium boehmianum (A.boehmianum var.boehmianum) is quite different fromA.swazicum in a number of traits. It is an upright, profusely-branched shrub 10 eight feet tall in nature (Plaizier, 1980), where it is always found in rocks (Chuck Hanson, pers. obs.). Its leaves are the largest in the genus, several inches long and broad, widest near the tip. The plant has a very short (summer) growing season. It is in leaf only about three months a year, and this cannot be extended by cultural conditions. The caudex is poorly developed. It occurs in Namibia and Angola, on the other side of the continent from A.swazicum.

Oh, now THIS is funny..

I continued reading, and they actually correct this error on page 4 of the text.

Adenium arabicum

Adenium arabicum Balf. f. occurs along the southern and western margin of the Arabian peninsula. The plants are caudiciform in the more arid habitats and treelike in wetter ones. The Saudi form may produce an erect trunk to four meters (12 feet) tall (Vincett, 1984). Higher in the mountains the trunk is reduced to a massive caudex (Collenette, 1985). The leaves are generally larger than those of A.obesum, tend to be pubescent, and have very rounded tips. Populations in southern Yemen (Figs.19 and 21) are characterized by short, broad caudexes and the largest leaves in the genus-up to 20cm long and 12 cm wide (8 x 4.5", larger than those of A.boehmianum, which was erroneously reported to have the largest leaves in Dimmitt and Hanson, 1992). The caudex can attain a meter in diameter (Collenette, 1985; Miller and Morris, 1988).

So, arabicum is the largest according to them.

The Genus Adenium in Cultivation