1198 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



12. Jacquemontia palmeri S. Wats. Proc. Amer. Acad. 24: 63. 1889. 

 JacQuemontia imlmeri varians T. S. Brandeg. Zoe 5: 170. 1903. 

 Baja California and Sonora ; type from Guaymas, Sonora. 



Stems herbaceous, thinly tomentose or pilose ; leaves ovate-cordate, 1.5 to 4.5 

 cm. long, obtuse or acute, pilose or glabrate ; peduncles slender, longer than the 

 leaves ; corolla blue, 7 to 8 mm. long. 



13. Jacquemontia pringlei A. Gray, Proc. Amer. Acad. 17: 227. 1882. 

 Jacquemontia pringlei glabrescens A. Gray, Proc. Amer. Acad. 21: 402. 1886. 

 Chihuahua and Sonora; Oaxaca (?). Type from Santa Catalina Mountains, 



Arizona ; also in El Salvador. 



Slender vine, woody below, the stems pubescent or glabrate; leaves broadly 

 ovate-cordate, 1.5 to 6 cm. long, pubescent or glabrate; peduncles equaling or 

 longer than the leaves ; corolla 1.5 to 2.5 cm. long, pale blue or white. " Cam- 

 panula " (El Salvador). 



14. Jacquemontia smithii Robins. & Greenm. Amer. Journ. Sci. 50: 160. 1895. 

 Puebla and Oaxaca; type from Cuicatlan, Oaxaca, altitude 540 meters. 

 Stems erect or nearly so, woody below, puberulent ; leaves broadly ovate, 1 



to 5 cm. long, usually subcordate at base, puberulent or tomentulose; pedun- 

 cles longer than the leaves ; corolla blue, 12 to 15 mm. long. 



EXCLUDED SPECIES. 



Jacquemontia chiapensis T. S. Brandeg. Univ. Calif. Publ. Bot. 6: GO. 1914. 

 This plant, described from Tonaia, Chiapas, is Aniseia martinicensis (Jacq.) 

 Choisy. 



4. OPERCULINA Manso, Enum. Subst. Bras. 16. 1836. 



Reference: House, Bull. Torrey Club 33: 495-503. 1906. 



Stems scandent, herbaceous or fruticose; leaves varying from entire to digi- 

 tately compound ; calj'x large, pyriform, constricted above, the sepals scarious 

 or chartaceous ; corolla campanulate or fuunelform ; anthers spirally twisted ; 

 capsule large, 2-celled and 4-seeded or imperfectly 4-celled; seeds usually gla- 

 brous. 



Leaves entire. 



Peduncles conspicuously winged 1. 0. alatipes. 



Peduncles not at all or only obscurely winged. 



Leaves lance-linear 2. 0. lancifolia. 



Leaves ovate-cordate or rounded-cordate. 



Sepals 2 to 2.5 cm. long ; corolla tube twice as long as the calyx. 



3. O. rhodocalyx. 

 Sepals 3 cm. long or more ; corolla tube little exceeding the calyx. 



4. 0. discoidesperma. 

 Leaves lobed or digitately compound. 

 Leaves digitately compound, divided to the petiole. 



Plants hirsute 5. 0. aegyptia. 



Plants glabrous. 



Corolla yellow 6. O. aurea. 



Corolla white or whitish. 



Leaflets long-acuminate 7. 0. palmeri. 



Leaflets obtuse 8. 0. platyphylla. 



