160 MIMOSACEAE. 



Foliage glabrous. 



Leaflets linear-oblong; base of trunk armed with clusters of 



long spines. 1. A. acuifera. 



Leaflets obovate to oblong and elliptic; unarmed tree. 2. .1. choriophylla. 



Foliage pubescent; leaflets many, linear. 3. A. macracantha. 



1. Acacia acuifera Benth. in Hook. Lond. Journ. Bot. 1: 496. 1S42. 



A glabrous, much-branched shrub or small tree up to about 4 m. high, the 

 base of the trunk armed with clusters of rigid sharp spines 4-10 cm. long, the 

 slender twigs warty. Stipules spinescent, 2-20 mm. long; petiole 3-10 mm. 

 long, bearing a sessile, nearly flat gland at the end, between the single pair of 

 short-stalked pinnae; pinnae 5-9 cm. long, the rachis bearing small glands 

 between the pairs of leaflets; leaflets 8-17 pairs, oblong, coriaceous, 5-15 mm. 

 long, obtuse at the apex, obliquely truncate at the sessile base, shining above, 

 dull beneath; peduncles solitary or fascicled, slender, 2-3.5 cm. long; flowers 

 yellow in dense globose heads about 8 mm. in diameter; stamens about twice 

 as long as the corolla; pod fleshy, linear, curved, 5-7 cm. long, 5-7 mm. thick, 

 slightly impressed between the seeds. 



Coppices and scrub-lands, Eleuthera, Cat Island, Rum Cay, Fortune Island, 

 Acklin's, Grand Turk. Caicos Islands, Inagua and Little Inagua. Endemic. Ba- 

 hama Acacia. Rosewood. Cassip. Poek-and-Doughboy. 



2. Acacia choriophylla Benth. in Hook. Lond. Journ. Bot. 1: 495. 1842. 



An unarmed tree, up to 8 or 9 m. high, the twigs and leaves glabrous. 

 Stipules minute, subulate; petioles rather stout, 8-15 mm. long, glandular; 

 leaves 1-2 dm. long; pinnae 1-3 pairs, short-stalked; leaflets 3-7 pairs, sessile, 

 oblong to obovate, subcoriaceous, 1.5-3 cm. long, 8-15 mm. wide, rounded or 

 slightly emarginate at the apex, mostly obtuse at the base ; peduncles mostly 

 clustered in the axils, slender, glabrous, often numerous, 2-3.5 cm. long; 

 flowers yellow, in dense globose heads 6-8 mm. in diameter, the corolla puberu- 

 lent ; stamens about twice as long as the corolla ; pod stipitate, woody, oblong, 

 straight or somewhat curved, compressed, 4-8 cm. long, 1.5-2.5 cm. wide, about 

 8 mm. thick, short-pointed, glabrous, tardily dehiscent. 



Coppices and scrub-lands, throughout the archipelago from Abaco and Great 

 Bahama to Andros, Mariguana and Inagua : Cays of northern Cuba. Recorded by 

 Hitchcock as Pithecolobium asplenifolium Griseb. Cinnecoed. 



3. Acacia macracantha H. & B.; Willd. Sp. PL 4: 1080. 1806. 



A widely branched tree, 5-15 m. high, or sometimes a shrub, the young 

 twigs slender, tomentose or pubescent, the tortuous branches armed with 

 stipular spines 6 cm. long or less, or sometimes unarmed. Leaves tomentose 

 or pubescent, the short petiole bearing a sessile depressed gland ; pinnae 8-40 

 pairs, short-stalked, 2-4 cm. long; leaflets 15-40 pairs, linear, 2-5 mm. long, 

 obtuse, sessile, glabrous or nearly so ; peduncles clustered or solitary in the 

 upper axils, slender, pubescent, 1-3 cm. long; flowers yellow, capitate; heads 

 globose, 8-10 mm. in diameter; pod linear, tomentulose, turgid-compressed, 

 6-10 cm. long, straight or a little curved, continuous or more or less torulose, 

 somewhat pulpy. 



Rocky plain, Salt Cay, Turk's Islands ; in a yard, Matthew Town, Inagua : 

 Jamaica ; Cuba ; Hispaniola ; Vieques ; St. Thomas to Tortola, Martinique and Vene- 

 zuela. Long-spined Acacia. 



6. VACHELLIA W. & A. Prodr. 272. 1834. 



Spiny shrubs or small trees, with bipinnate leaves, numerous, small leaflets, 

 the polygamous flowers in globular heads. Calyx 5-lobed; corolla tubular- 

 funnelform, 5-lobed. Stamens numerous, the filaments distinct. Ovary sessile; 



