Part 2, 1921] RUBIACEAE 141 



Leaves long-petiolate. 



Leaf-blades finely pilose with spreading hairs; corolla hirtellous. 3. W. pubescens. 



Leaf-blades glabrous, or appressed-pilose beneath along the veins; 

 pubescence of the corolla appressed. 

 Bracts caducous; corolla-lObes oblong, twice as long as broad. 4. 11'. Donnell-Smithii. 



Bracts persistent; corolla-lobes broadly ovate, nearly as broad as 



long. 5. W. macrophylla. 



Leaf -blades pinnatitid. 



Petioles marginate to the base or naked. 



Inflorescence sessile, many -flowered; petioles marginate to the 



base. 6. W. tinajita. 



Inflorescence short-pednnculate; petioles naked. 7. W. gymnopoda. 



Petioles naked above, with large auricles at the base. 



Auricles nearly half as long as the petioles; calyx tubular, 2 cm. long, 



the lobes one third as long as the tube; bracts 1-2 cm. long. 8. W. Piltieri. 



Auricles less than one fourth as long as the petioles; calyx tubular- 

 campanulate, 1.5 cm. long, the lobes half as long as the tube; 

 bracts 0.5-1 cm. long. 9. XV. brachyotis. 



1. Watsonamra magnifica (K. Krausc) Standley, Contr. U. S. 



Nat. Herb. 17: 441. 1914. 



Pentagonia magnifica K. Krause, Bot. Jahrb. 40: 325. 1908. 



Small tree, about 3 meters high, the branches brownish, sericeous when young; stipules 

 lance-oblong, about 5 cm. long, attenuate; leaves sessile or subsessile, the blades obovate or 

 obovate-oblong, 30-78 cm. long, 15-29 cm. wide, narrowed to the obtuse or rounded base, 

 acuminate at the apex, entire, glabrous or minutely sericeous beneath along the veins, the 

 lateral veins prominent, 12-15 on each side; cymes densely flowered, sessile or short-peduncu- 

 late; bracts ovate, acute; hypanthium 3-4 mm. long, sericeous; calyx tubular, 1.5 cm. long, 

 sparsely sericeous outside, red, the lobes ovate, 5-6 mm. long, obtuse; corolla red, puberulent, 

 especially above, the tube 2-2.5 cm. long, the lobes short, oblong, obtuse, reflexed or spreading; 

 filaments about 1 cm. long, the anthers linear; disk entire; fruit globose or ovoid-globose, 

 1.2-2.2 cm. in diameter or larger. 



Type locality: Along the Rio Timbique, Colombia. 

 Distribution : Panama and Colombia. 



2. Watsonamra Wendlandi (Hook.) Kuntze, Rev. Gen. 302. 



1891. 

 Pentagonia Wendlandi Hook. Bot. Mag. pi. 5230. 1861. 



Shrub, the branchlets thick, glabrate; stipules ovate-oblong, attenuate; leaves subsessile, 

 the blades oblong-obovate, narrowed to the rounded base, acutish at the apex, coriaceous; 

 inflorescence few-flowered, subsessile, the flowers sessile or nearly so; bracts ovate-oblong, 

 obtuse; calyx green, sericeous outside, the limb tubular-campanulate, glandular within at the 

 base, the lobes oval or suborbicular, about half the total length of the calyx, rounded at the 

 apex; corolla yellow, the tube about 2.5 cm. long, very thick, the lobes triangular-ovate, ob- 

 tuse, erect ; disk entire ; stamens unequal, the filaments stout, flexuous. 



Type locality: Described from cultivated plants of Central American origin. 

 Distribution: Known only from the original material. 

 Illustration: Bot. Mag. pi. 5230. 



3. Watsonamra pubescens Standley, Contr. U. S. Nat. Herb. 



17:441. 1914. 



Tree, 3-4 meters high, the branchlets succulent, hirtellous; petioles naked, 4-10 cm. long, 

 densely short-hirtellous; leaf-blades obovate-oval or elliptic-oval, 26-48 cm. long and 12-24 

 cm. wide or larger, acute at each end, chartaceous, densely short-hirtellous, green above, 

 paler beneath, the lateral veins prominent, 12-14 on each side, dichotomous near the margin; 

 inflorescence few-flowered, the peduncles 5 mm. long or shorter, the very stout pedicels 2-3 

 mm. long; bracts oval or broadly ovate, 1-1.5 cm. long, obtuse, sparsely sericeous outside; 

 hypanthium 6 mm. long, densely sericeous; calyx about 2 cm. long, densely sericeous below, 

 sparsely so above, the lobes oval or oblong, about 1.5 cm. long, obtuse; corolla hirtellous out- 

 side, the tube slender, 2.5 cm. long, 3.5 mm. thick, the lobes ovate, acute, 5 mm. long; filaments 



