2804 Leaflets of Philippine Botany [Vol. VIII, Art. 115 



RUBIACEAE 



Amaracarpus apoensis Elm. n. sp. 



Lax shrub less than 2 m high; stems and branches 

 greenish, quite rigid, the latter numerous and widely spread- 

 ing horizontally; twigs numerous and slender, latericius pu- 

 bescent especially the young tips. Leaves also horizontally 

 spreading, lucid and bright green above, much paler beneath, 

 flat, membranous, glabrous except the nerves on the nether 

 side, drying equally dull or dark reddish brown on the sides, 

 opposite, regularly scattered along the twigs, frequently with 

 one or a pair of smaller leaves in the axils, 2 cm long, 

 7.5 mm wide across the middle or above it, elliptically 

 oblong or ovately so, entire, the axillary ones much smaller 

 and even bract-like, obtuse at the apex, base acute or 

 broadly cuneite; midvein conspicuous beneath, reddish brown 

 hairy especially when young; the larger blades with 4 pairs 

 of lateral nerves, quite evident frdm beneath, divaricate and 

 ascendingly curved, tips conspicuously interarching and united, 

 reticulations none, similarly hairy; petioles very slender, red- 

 dish pubescent, varying up to 5 mm in length; stipule 

 subglabrous, 3 mm long, truncate except the seta-like bristles 

 on each side, rather rigid. Flowers axillary, ascending, 1 

 to 3-clustered, greenish white except the green calyx tips; 

 peduncle very short and subtended by a pair of foliaceous 

 bracts; pedicel thick, 1 mm long, densely brown hairy; 

 calyx 4 mm long, the 4 segments united at the base or 

 toward it, narrowly oblong, glabrous or only strigose in the 

 sinus between the lobes; corolla elongated or tubular, white, 

 glabrous except the throat, 4 mm long, the basal one third 

 united and more or less constricted; oblongish segments also 

 4, thick, valvate, obtuse, tips incurved, at least 1 mm 

 wide; stamens of an equal number, alternating with the 

 segments and inserted upon the throat or to some extent 

 in the tube; filaments glabrous, slender, 1.5 mm long; an- 

 ther compressed, oblong, introrse, nearly 1 mm long and 

 one half as wide; ovary superior, truncately globose, glab- 

 rous, 0.75 mm in diameter; style 1 mm long, slender, 

 strict, also glabrous, forked at the distal end; fruit 5 to 6 



