Notes

Adad, adat, cadaad, idaad (Som.). A. senegal is very variable in Somalia. Normally the species is a small tree with pods rounded at the apex. Shrubby plants, branching from near the base, are often distinguished as var. kerensis in recent literature, but the variation is continuous and this variety is omitted here. Plants with acute or acuminate pods are sometimes called var. rostrata Brenan (the type of A. oxyosprion is such a form). Var. rostrata was originally described from southern Africa, outside the range of typical A. senegal. In Somalia the variation in pod shape is continuous and a separation of individuals with ± acute pods does not seem meaningful. A. oliveri (syn. A. unispinosa) has been distinguished from A. senegal by having leaves with only 1–2 pairs of pinnae. I now believe that this is no more than another form of A. senegal in N Somalia and N. Ethiopia. Intermediate forms are frequent also in this case. The entities “ A. sp. near A. senegal ” and “ A. sp. near A. somalensis ” in Ross (1979) both seem to consist of such intermediates. The perhaps most extreme form here included in A. senegal is represented by Bally & Melville 15541, a prostrate plant 10–15 cm tall and more than 5 m in diam. with very short internodes, growing on limestone cliffs in “Wadi Nogal” near Eyl.

Notes

Adad, adat, cadaad, idaad (Som.). A. senegal is very variable in Somalia. Normally the species is a small tree with pods rounded at the apex. Shrubby plants, branching from near the base, are often distinguished as var. kerensis in recent literature, but the variation is continuous and this variety is omitted here. Plants with acute or acuminate pods are sometimes called var. rostrata Brenan (the type of A. oxyosprion is such a form). Var. rostrata was originally described from southern Africa, outside the range of typical A. senegal. In Somalia the variation in pod shape is continuous and a separation of individuals with ± acute pods does not seem meaningful. A. oliveri (syn. A. unispinosa) has been distinguished from A. senegal by having leaves with only 1–2 pairs of pinnae. I now believe that this is no more than another form of A. senegal in N Somalia and N. Ethiopia. Intermediate forms are frequent also in this case. The entities “ A. sp. near A. senegal ” and “ A. sp. near A. somalensis ” in Ross (1979) both seem to consist of such intermediates. The perhaps most extreme form here included in A. senegal is represented by Bally & Melville 15541, a prostrate plant 10–15 cm tall and more than 5 m in diam. with very short internodes, growing on limestone cliffs in “Wadi Nogal” near Eyl.

Notes

Adad, adat, cadaad, idaad (Som.). A. senegal is very variable in Somalia. Normally the species is a small tree with pods rounded at the apex. Shrubby plants, branching from near the base, are often distinguished as var. kerensis in recent literature, but the variation is continuous and this variety is omitted here. Plants with acute or acuminate pods are sometimes called var. rostrata Brenan (the type of A. oxyosprion is such a form). Var. rostrata was originally described from southern Africa, outside the range of typical A. senegal. In Somalia the variation in pod shape is continuous and a separation of individuals with ± acute pods does not seem meaningful. A. oliveri (syn. A. unispinosa) has been distinguished from A. senegal by having leaves with only 1–2 pairs of pinnae. I now believe that this is no more than another form of A. senegal in N Somalia and N. Ethiopia. Intermediate forms are frequent also in this case. The entities “ A. sp. near A. senegal ” and “ A. sp. near A. somalensis ” in Ross (1979) both seem to consist of such intermediates. The perhaps most extreme form here included in A. senegal is represented by Bally & Melville 15541, a prostrate plant 10–15 cm tall and more than 5 m in diam. with very short internodes, growing on limestone cliffs in “Wadi Nogal” near Eyl.