=A. Seyal= _Del._ TELEH (Baggara), TALH HAMRA or TALHA—Arab; ME (J. Daier), SHALEIH (Dilling), TEILI (J. Eliri) & TIRIGO (Kadugli)—Nuba; KUKATI—Bari; BI (Kaka), RATT (Renk) & TEP (Mongalla)—Dinka; MELA—Hameg; TEIB & LUOR—Nuer; ALLAD—Shilluk. Small to middle-sized tree, with rufous bark; spines white, straight or nearly so, up to 1½ in. long. Pinnæ 11-12 pairs; leaflets 18-22 pairs. Flowers globose, yellow, about 1 in. diam. Pods ab. 3 in. long, curved, slightly contracted between the seeds. Throughout the Sudan. Wood white, not durable, liable to attacks of insects, especially if cut green. The gum is of good quality but inferior to that of _A. Verek_. The bark is used for tanning and the bast yields a fibre. Native women fumigate themselves with the wood smoke. =A. Seyal= _Del._ =var. Fistula= _Schwfth._ TALH BEID & SOFFAR—Arab; SHALEIH WIWI (Dilling)—Nuba; BAGU—Hameg; KONAIYER (Kaka) & TEP (Mongalla)—Dinka; ASHAR—Shilluk. South Sudan. Much like preceding but bark white and the bases of the thorns inflated. Moister parts of the Sudan. Has the same qualities as Red Talh. =A. Ehrenbergiana= _Hayne._ SALLAM—Arab. Shrub with brown papery bark. Flower-heads globose, golden yellow. Spines slender, straight, also hooked. Pinnæ 1-2 pairs; leaflets 8-10 pairs, oblong. Pod narrow-linear, falcate, constricted between the seeds, up to 4½ in. long. Northern Sudan, usually in arid tracts. Yield a gum. =A. stenocarpa= _Hochst._ Small tree; spines straight, short. Flowers globose, yellow; pods curved as in _A. Seyal_. Pinnæ 4-10 pairs with at least 1 gland, sessile at base of the rachis; leaflets 10-20 pairs, linear oblong. Kassala Prov. (Gallabat); White Nile Prov.; Bahr El Jebel (Nyangara); Mongalla Prov. One of the species affording the Gum-arabic of commerce. =A. Verek= _Guill._ & _Perr._ HASHAB & SUBAHI (Wad Medani)—Arab; KALIALMO (J. Daier) & TŪT (Dilling)—Nuba; KADOFI—Bari; ATĪYDOK (Kaka) & CHIANDOK (or CHIANDAK) (Mongalla)—Dinka; GARANDAK—MESHIRG—EDIN—Hameg; ADHWAG—Shilluk; BAM—Nuer. Small to moderate-sized tree; spines 3, stout, sharp, dark brown, short, two straight and one recurved. Pinnæ 3-5 pairs; leaflets 10-15 pairs. Flowers in lax cylindrical spikes, white. Pods thin, straight, papery, 3 in. long. Southern Nubia; From Berber Province to Mongalla; Fung, Darfur & Kordofan Provinces. Wood dark, durable. This tree yields the best gum of commerce. =A. glaucophylla= _Steud._ HASHAB (Kassala & Karora)—Arab. Large shrub or small tree, glabrous, or extremities puberulous; infra- stipular prickles 2-3, short, straight or slightly recurved, often absent. Pinnæ 3-6-jugate, with small gland at base of rachis; leaflets 12-20 pairs, oblong. Spikes 1-3 in axils; flowers white. Pod linear, flat, narrowed each end, 3-4 in. long. Between Suakin & Berber (Omareg); Kassala Prov. (J. Kassala); Red Sea Prov. (Karora hills). =A. mellifera= _Benth._ KITTIR—Arab; KAWTAW (J. Daier) & URŪM (Kadugli)—Nuba; NARAH (Renk)—Dinka.