1388 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM 



Bracts small and inconspicuous. 

 Branchlets usually glabrous. 



Corolla about 15 mm. long; leaves barbate beneath along the costa. 



3. P. pinularis. 

 Corolla 5 mm. long or less; leaves not barbate beneath. 



4. P. horizontalis. 

 Branchlets pubescent, puberulent, or villous. 

 Cymes sessile, branching from the base. 



Stipules large, brown, sheathing, finally split along one side. 



5. P. undata. 



Stipules short-deltoid, not sheathing 6. P. pulverulenta. 



Cymes pedunculate. 



Stipules large and sheathing, brown 7. P. erythrocarpa. 



Stipules small, greenish, not sheathing. 



Corolla minutely granular-puberulent 8. P. pubescens. 



Corolla hirtellous or villosulous 9. P. hebeclada. 



Leaves glabrous beneath. 



Bracts large and conspicuous. 



Bracts obtuse; inflorescence loosely branched 10. P. chiapensis. 



Bracts long-acuminate; inflorescence headlike or trichotomous. 



11. P. involucrata. 

 Bracts small and inconspicuous. 



Stipules persistent, greenish, bilobate. 



Branches of the inflorescence reflexed 12. P. patens. 



Branches not reflexed 13. P. cuspidata. 



Stipules deciduous, brown, entire. 



Leaves coriaceous, broadly obovate, broadest above the middle. 



14. P. oerstediana. 



Leaves thin, broade-st at or near the middle. 



Calyx lobes short, ovate or deltoid, often obtuse. 



Leaves mostly elliptic and 6 to 11 cm. wide 15. P. trichotoma. 



Leaves narrowly elliptic-oblong or lance-elliptic, 1.5 to 5 cm. wide. 



16. P. papantlensis. 

 Calyx lobes elongate, lanceolate or linear-lanceolate. 



Leaves mostly elliptic and 3 to 6 cm. wide 4. P. horizontalis. 



Leaves narrowly elliptic-oblong, 1 to 2 cm. wide. 



17. P. oaxacana. 



1. Psychotria anomothyrsa K. Schura. & Donn. Smith, Bot. Gaz. 35: .3. 1903. 

 Chiapas. Central America to Peru; type from Cubilquitz, Guatemala. 

 Shrub, 1 to 1.5 meters high, glabrous; leaves long-petiolate, eUiptic to oblong, 



15 to 25 cm. long, acuminate; flowers white, in axillary pedunculate panicles; 

 corolla about 6 mm. long; fruit white. 



P. nicotianaefolia Mart. & Gal.' is probably closely related to this species if 

 not identical with it. 



2. Psychotria purpusii Standi., sp. nov. 



Type from Cerro del Boquer6n, Chiapas {Purpus 7012; U. S. Nat. Herb. no. 

 567269). 



Branchlets sordid-viUous; leaves slender-petiolate, elliptic, 9 to 12 cm. long, 

 4 to 5 cm. wide, acuminate, acute at base, fulvous-villosulous above, densely 

 villosulous beneath; flowers in terminal long-pedunculate corymbs about 5 cm. 

 broad; bracts foliaceous, equaling or longer than the flowers, the sesessile or short- 

 pedicellate; corolla 8 mm. long in bud, densely villous; fruit 6 mm. long, deeply 

 sulcate, villous. 



1 Bull. Acad. Brux. 11': 229. 1844. 



