Part 2, 1921] RUBIACEAE 113 



in the axils of the veins, the lateral veins slender, 7-10 on each side, subarcuate, ascending at 



a broad angle, the margin plane; inflorescence cymose-paniculate, terminal and axillary, 



many-flowered, 6-20 cm. broad, the peduncles 5-11 cm. long, the rachis subcompressed, the 



flowers sessile or short-pedicellate; bracts often leaf-like but usually small, triangular, the 



bractlets minute; hypanthium 3-4 mm. long, glabrous or nearly so; calyx-teeth minute, ovate, 



acute, approximate; corolla pink, glabrous outside, the tube 4-10 mm. long, about 1.5 mm. 



thick, the lobes rounded, about 4 mm. long, very minutely papillose-puberulent within; anthers 



about 0.5 mm. long. 



Tvpe locality: Nicoya, Costa Rica. 

 Distribution: Costa Rica to Colombia. 



3. Macrocnemum pastoense Karst. Linnaea 30: 150. 1859. 



Tree, the branches stout, brownish, sparsely strigose when young; stipules oval or oblong, 

 1-2 cm. long, rounded at the apex, sparsely strigillose outside; petioles stout, 0.7-2.5 cm. long, 

 strigillose; leaf-blades oval or obovate-oval, often broadly so, 8-15 cm. long, 4.5-8.5 cm. wide, 

 subcordate to obtuse at the base, rounded or very obtuse at the apex and abruptly short- 

 acuminate, with a very broad obtuse acumen, membranaceous, deep-green and sublustrous 

 above, glabrous or very sparsely strigillose, the- venation plane or the costa sulcate, slightly 

 paler beneath, strigose along the veins, minutely strigillose elsewhere or glabrate, the venation 

 prominent, the lateral veins slender, 6-8 on each side, arcuate, ascending at an angle of 60° or 

 more, the margin plane; inflorescence axillary and terminal, cymose-paniculate, many-flowered, 

 5-12 cm. broad, the peduncles 5-10 cm. long, subcompressed, the branches strigose, the flowers 

 sessile or short-pedicellate; bracts often leaf-like, mostly triangular and reduced, the bractlets 

 minute; hypanthium 3-4 mm. long, densely and minutely pilose; calyx-teeth minute, rounded, 

 much broader than long; corolla pink, minutely pilose outside, the tube 7-10 mm. long, about 

 1.5 mm. thick, the lobes rounded, 3-4 mm. long, minutely papillose-puberulent within; anthers 

 yellow, about 0.5 mm. long. 



Type locality: Banks of the rivers Mayo and Juanambu, near Pasto, Colombia. 



Distribution: Panama and Colombia. 



34. CALYCOPHYLLUM DC. Prodr. 4: 367. 1S30. 



Enkylista Benth. Jour. Bot. & Kew Misc. 5: 230. 1853. 



Trees, the branchlets terete. Leaves opposite, petiolate, the blades broad. Stipules 

 interpetiolar, narrow, caducous. Flowers small, white, in branched terminal corymbose 

 panicles, sessile or short-pedicellate, ebracteolate or minutely bibracteolate, in bud inclosed by 

 membranaceous bracts; hypanthium oblong, cylindric; calyx truncate, sometimes expanded 

 into a large foliaceous petiolate lamina; corolla short-funnelform, the tube short, the throat 

 villous, the limb 6-S-lobate, the lobes broad, imbricate or contorted, one lobe exterior. Stamens 

 inserted in the throat of the corolla; filaments subulate, subelongate; anthers versatile, oblong, 

 exserted. Disk annular. Ovary 2-celled; style filiform, glabrous, the 2 branches linear- 

 oblong, obtuse; ovules numerous, imbricate, the placentae subcylindric, adnate to the septum. 

 Capsule oblong-cylindric, truncate, 2-celled, septicidally bivalvate, the valves coriaceous, 

 entire. Seeds few or numerous, imbricate, usually minute, the body oblong, compressed, the 

 testa membranaceous, produced at each end into an elongate wing; endosperm fleshy; coty- 

 ledons ovate, the radicle elongate. 



Type species, Macronemum candidissiynum Vahl. 



1. Calycophyllum candidissimum (Vahl) DC. Prodr. 4: 367. 1830. 



Macrocnemum candidissimum Vahl, Symb. 2: 38. 1791. 

 Mussaenda Candida Poir. in Lam. Encyc. 4: 395. 1797. 

 Mtissaenda candidissima R. & S. Syst. Veg. 5: 251. 1819. 



Tree, 5-12 meters high, the branchlets slender, reddish-brown, glabrous or nearly so, 



often hirsute at the nodes; stipules triangular or lanceolate, 1 cm. long or shorter; petioles 



slender, 0.4-3.5 cm. long; leaf-blades rounded-oval, oval, oval-ovate, or ovate, 4-13 cm. long, 



1.5-7.5 cm. wide, acute or obtuse at the base, abruptly short-decurrent, abruptly acuminate or 



