44 Proceedings of the Biological Society of Washington. 



the number of stamens of A. coulteri, and particularly in the persistence of 

 the bracteoles on the rachis of the spikes after the fall of the flowers. 



Acacia gaumeri Blake, sp. nov. 



Tree 8 meters high; stem glabrous, below the stipules armed with firm, 

 retrorse, broad-based, blackish prickles about 4 mm. long, as well as a few 

 very small straight prickles; young branchlets spreading-pilosulous; leaves 

 bipinnate, 4 to 4.5 cm. long including petiole; stipules subulate, deciduous, 

 1 mm. long; petiole 1.5 to 2 cm. long, canaliculate, subglabrous, bearing 

 below the middle an oval gland 1 mm. long; rachis 2.5 cm. long, 3-canalicu- 

 late, pilosulous in the grooves, unarmed, sometimes with a single apical 

 gland; pinnae 4 pairs, 4 to 5 cm. long, narrowly oblong in outline, the axes 

 pilosulous; leaflets 9 to 16 pairs, oblong, 8 to 11 mm. long, 2.5 to 4 mm. 

 wide, inequilateral, rounded or truncate-rounded at apex, at base truncate- 

 rounded and oblique, beneath slightly paler, sparsely appressed-pubescent 

 on both sides; spikes very numerous, fascicled, axillary and terminal, form- 

 ing an ovoid naked panicle 9 to 16 cm. wide, the axes spreading-pilosulous; 

 ultimate peduncles 8 to 15 mm. long, pilosulous, usually bearing two linear- 

 lanceolate, alternate bracteoles about 1.3 mm. long; spikes rather dense, 

 oblong-cylindric, 1 to 1.4 cm. long, 6.5 mm. in diameter (including the sta- 

 mens), the bracteoles deciduous; calyx turbinate, rounded at base, 1.5 mm. 

 long, spreading-pilosulous below the teeth, 5-lobed for f its length, the 

 lobes deltoid, acutish; corolla when dry pale yellowish, 2 mm. long, 5-lobed 

 to middle, pubescent below the tip of the lobes with subappressed hairs, 

 the lobes ovate, acutish, densely ciliate with subglandular hairs; stamens 

 about ISO, some free, some irregularly fasciculate-connate at base or to the 

 middle, 2.8 mm. long; ovary with slender glabrous stipe, about 11-ovulate, 

 rather densely long-pilose. 



Type in the herbarium of the Field Columbian Museum, No. 446,825, 

 collected three miles inland from Silam, Yucatan, May, 1916, by G. F. 

 Gaumer & Sons (No. 23,332). 



A member of the Americanae Spiciflorae, as the genus is arranged by 

 Bentham. 



Diospyros anisandra Blake, sp. nov. 



Dioecious shrub, 3 meters high; stem glabrous; leaves alternate, crowded 

 at the tips of the branches; petioles 1 to 2 mm. long, sparsely puberulous; 

 blades obovate, 2.5 to 4.3 cm. long, 1.2 to 2.3 cm. wide, retuse at apex, 

 cuneate at base, shining above, beneath slightly paler, glabrous except for 

 a few hairs at base of blade on upper side, chartaceous-membranaceous, 

 slightly veiny, the lateral veins 4 to 6 pairs ; staminate flowers 1 or 2, axillary 

 on the young branchlets, pendulous on pedicels 1 to 1.5 mm. long; calyx 

 funnelform, 4 mm. long, glabrous outside, the 4 lobes lanceolate, 1.5 mm. 

 long, acuminate, recurved, 3-ncrved, within spreading-puberulous below 

 the apex; corolla urccolate, "yellow," glabrous, 14 mm. long, the tube 7 

 mm. long, the 4 lobes lanceolate, 7 mm. long, spreading, acuminate; stamens 

 glabrous, connate at extroinc base, alternntely longer and shorter, the longer 

 4 mm. long (filaments 2 nun., anthers 2 mru.), the anthers obliquely cordate 



