Part 2, 1921] RUBIACEAE 93 



Type locality: Stream hanks. Verapaz, Guatemala. 

 Distribution: Along streams, Michoaean to Veracruz and Panama. 

 Illustrations: Hook. Ic. pi. 475, 476; Bot. Mag. pi. 5258. 



26. STYLOSIPHONIA Brand. Univ. Calif. Publ. Bot. 6: 70. 1914. 



Nearly glabrous shrubs, the branchlets subangulate. Leaves opposite, petiolate, mem- 

 branaceous. Stipules interpetiolar, small, glandular-dentate. Inflorescence axillary and 

 terminal, cymosely few-flowered or sometimes 1 -flowered, pedunculate, the flowers pedicellate, 

 bracteolate; hypanthium oblong; calyx 5-lobate, the lobes narrow, unequal, deciduous (?); 

 corolla salverform, the tube slender, elongate, terete, the limb 5-lobate, the lobes lance-linear, 

 elongate, contorted. Stamens 5, inserted in the corolla-tube; filaments short; anthers dorsi- 

 fixed, erect, linear-oblong, obtuse, included. Ovary 2-celled; style filiform, elongate, bifid; 

 ovules numerous. Capsule ovoid, 2-celled, coriaceous, septieidally bivalvate, the valves 

 bipartite. Seeds numerous, angulate, rugose. 



Type species, Stylosiphonia glaha Brand. 



1. Stylosiphonia glabra Brand. Univ. Calif. Publ. Bot. 6: 70. 1914. 



Branches slender, brownish, glabrous or sparsely pilose at the nodes, the internodes elon- 

 gate; stipules deltoid, cuspidate, about 2 mm. long, thick, deciduous; petioles slender, 0.5-2.3 

 cm. long, sparsely puberulent; leaf-blades lanceolate, oblong-lanceolate, or oblanceolate, 

 6.5-14 cm. long, 1.5-3 cm. wide, acute to long-attenuate at the base, abruptly long-acuminate 

 or very long-attenuate at the apex, with an acute, often falcate acumen, bright-green, subcon- 

 colorous, glabrous above, the venation plane, sparsely short-pilose beneath along the veins or 

 glabrate, the lateral veins slender, prominulous, arcuate; inflorescences 1-4-flowered, the pe- 

 duncles slender, glabrous, about 2 cm. long, the pedicels slender, 1-1.5 cm. long; bractlets 

 minute; hypanthium glabrous, 3 mm. long; calyx-lobes linear or oblanceolate, 3-5 mm. long, 

 acute; corolla glabrous, the tube about 1.8 cm. long and 1 mm. thick, the lobes more than half 

 as long as the tube, with a long subulate apex; capsule about 9 mm. long. 



Type locality: Chiapas. 



Distribution: Known only from the type locality. 



27. SIPANEA Aubl. PI. Guian. 147. 1775. 



Annual or perennial herbs, pubescent or glabrate, erect or prostrate, the branches terete. 

 Stipules linear, elongate, persistent. Leaves opposite, petiolate, the blades broad or narrow. 

 Flowers cymose or paniculate, the cymes corymbose, axillary or terminal, white or pink; hypan- 

 thium turbinate or ovoid; calyx 5-lobate, the lobes subulate, persistent; corolla funnelform or 

 salverform, the tube elongate, the throat dilated, glabrous, villous, or squamate, the limb 5- 

 lobate, the lobes equal, broadly ovate, spreading, contorted in bud. Stamens 5, inserted in the 

 corolla-throat; filaments short; anthers dorsifixed, linear, obtuse, included. Disk annular. 

 Ovary 2-celled; style filiform, included, bipartite, the branches linear, acute; ovules numerous, 

 the placentae small, affixed to the septum. Capsule ovoid or subglobose, coriaceous, 2-celled, 

 loculicidally bivalvate, many-seeded. Seeds minute, horizontal, angulate; testa reticutate; 

 endosperm fleshy; embryo clavate. 



Type species, Sipanea pratensis Aubl. 



1. Sipanea pratensis Aubl. PI. Guian. 147. 1775. 



Sipanea dichotoma H.B.K. Nov. Gen. & Sp. 3: 397. 1820. 



Plants perennial, erect or decumbent, the branches stout, densely or sparsely pilose- 

 sericeous, the internodes shorter or longer than the leaves; stipules subulate or triangular- 

 subulate, 3-7 mm. long, pilose-sericeous; petioles stout, 2-4 mm. long; leaf-blades lanceolate or 

 ovate-lanceolate, 3-7 cm. long, 0.7-1.8 cm. wide, obtuse oi acute at the base, long-attenuate at 

 the apex, bright-green, copiously pilose-strigose on both surfaces, especially along the veins, 

 the venation prominulous beneath, the lateral veins 5-7 on each side, nearly straight, ascending 

 at a very acute angle, the margins plane; inflorescence terminal, densely cymose, rather few- 



