1162 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



The Mexican species are poorly represented in herbaria, and the following 

 treatment is chiefly a mere compilation. 



Corolla 12 to 14 mm. long 1. M. andrieuxii. 



Corolla 2 cm. long or larger. 



Leaves subsessile 2. M. foliosa. 



Leaves petiolate. 



Leaves tomentose beneath 3. M. convolvulacea. 



Leaves hirtellous or glabrous beneath 4. M. oaxacana. 



1. Mandevilla andriexixii (Muell. Arg.) Hemsl. Biol. Centr. Amer. Bot. 2: 316. 



1881. 



Amhhjanthera andrieuxii Muell. Arg. Linnaea 30: 422. 1860. 



Type collected at San Francisco, between Huauapan and Oaxaca. 



Leaves short-petiolate, narrowly obovate or obovate-lauceolate, 2 to 3 cm. 

 long, subacute at base and apex, soft-pubescent beneath ; calyx lobes ovate- 

 lanceolate. 



2. Mandevilla foliosa (Muell. Arg.) Hemsl. Biol. Centr. Amer. Bot. 2: 316. 



1881. 

 AmbJijanthera foliosa Muell. Arg. Linnaea 30: 427. 1860. 

 Type collected near the City of Mexico. 



Leaves obovate, 9 to 12 cm, long, acuminate, cordate at base, glabrate 

 above, hirtellous beneath along the nerves; corolla 2 cm. long. 



3. Mandevilla convolvulacea (A. DC.) Hemsl. Biol. Centr. Amer. Bot. 2: 316. 



1881. 

 Echites convolvulacea A. DC. in DC. Prodr. 8: 451. 1844. 



Leaves oval, 7.5 to 10 cm. long, acuminate, obtuse or cordate at base, gla- 

 brate above; corolla tube 12 mm. long. 



4. Mandevilla oaxacana (A. DC.) Hemsl. Biol. Centr. Amer. Bot. 2: 316. 1881. 

 Ecliitep oaxacana A. DC. in DC. Prodr. 8: 451. 1844. 



Echites glaucescens Mart. & Gal. Bull. Acad. Brux. 11: 358. 1844. 



Mesechites hirtellula Miers, Apocyn. S. Amer. 234. 1878. 



ilandevilla schumanniana Loesener, Bull. Herb. Boiss. 2: 556. 1894. 



Oaxaca. 



Scandent shrub ; leaves lance-oblong to oblong-ovate, 4 to 6.5 cm. long, acute 

 or acuminate, rounded or subcordate at base, scaberulous or glabrate above; 

 corolla 2.5 to 3 cm. long, the tube slightly shorter than the throat. 



DOUBTFUL SPECIES. 



Mandevilla kabwinskii (Muell. Arg.) Hemsl. Biol. Centr. Amer. Bot. 2: 316. 

 1881. Amblyanthera karwinskii Muell. Arg. Linnaea 30: 426. 1860. Type from 

 Mexico. The description strongly suggest Echites coulteri. 



18. HAPLOPHYTON A. DC. in DC. Prodr. 8: 412. 1844. 

 The genus consists of a single species. 



1. Haplophyton cimicidum A. DC. in DC. Prodr, 8: 412. 1844. 



Sonora and Chihuahua to Veracruz and Chipas; type from Tehuantepec, 

 Oaxaca. Guatemala ; Cuba ; southern Arizona. 



Plants slender, herbaceous or woody below, usually 30 to 60 cm. high, the 

 stems puberulent ; leaves opposite, short-petiolate, ovate or lanceolate, 3 to 5 

 cm, long, long-acuminate, rounded at base, hispidulous; flowers few, terminal, 

 pedicellate, yellow; calyx eglandular, 5-parted, the lobes linear-subulate; 

 corolla salverform, the lobes 12 to 15 mm. long, longer than the slender tube; 



