STANDLEY TREES AND SHRUBS OF MEXICO. 1283 



Shrub, 1 to 2.5 meters high, glabrous throughout or nearly so; leaves 

 petiolate, mostly oblong-lanceolate, 8 to 18 cm. long, acuminate or rarely 

 obtuse, pale beneath ; flowers in terminal panicled cymes ; corolla about 1.5 

 cm. long. 



19. Cestrum diurnum. L. Sp. PI. 191. 1753. 



Sinaloa (probably cultivated) and Yucatan. West Indies. 



Shrub, usually about a meter high ; leaves oblong or oblong-elliptic, 6.5 to 

 12 cm. long, acute or obtuse, glabrous; flowers mostly in axillary pedunculate 

 racemes; calyx 3.5 mm. long, glabrous or somewhat tomentose; corolla 

 white; fruit about 6 mm. long. "Juan de noche" (Yucatan); "gaian de 

 dia" (Cuba). 



20. Cestrum viride Moric. ; Dunal in DC. Prodr. 13*: 606. 1852. 



Described from plants cultivated in Mexico ; specimens from Puebla and 

 MichoacS.n or Guerrero perhaps belong here. 



Shrub, 3 to 4 meters high ; leaves oblong-lanceolate, 17 cm. long or less, 

 long-acuminate, glabrous, short-petiolate, rounded or obtuse at base ; flowers in 

 axillary or terminal, often panicled cymes ; corolla about 1.5 cm. long. 



21. Cestrum laxum Benth. PI. Hartw. 33. 1840, 

 Cestrum psychotriaefoKum Schlecht. Linnaea 19 : 265. 1847. 

 Cestrum hourgeauianum Fernald, Proc. Amer. Acad. 35: 572. 1900. 



San Luis Potosf and Guanajuato to Mexico and Oaxaca ; type from Le6n, 

 Guanajuato. 



Shrub, 2 to 4.5 meters high, glabrous throughout or nearly so ; leaves lanceo- 

 late to oblong or oblong-elliptic, 10 cm. long or less, acute or acuminate ; cymes 

 axillary and terminal, the flowers mostly pedicellate; corolla 16 to 22 mm. 

 long. " Paloma " (Veracruz). 



22. Cestrum nitidum Mart. & Gal. Bull. Acad. Brux. 12*: 19. 1845. 

 Michoacfin to Morelos and Oaxaca ; type from mountains of Oaxaca. 

 Shrub or small tree, 1.5 to 6 meters high, glabrous throughout or nearly 



so; leaves slender-petiolate, lanceolate to elliptic, 7 to 11 cm. long, acuminate; 

 cymes chiefly in terminal panicles, the flowers mostly pedicellate; corolla 22 

 to 30 mm. long. 



DOUBTFUL SPECIES. 



Cesteum AMYGDALiroLiUM Dunal in DC. Prodr. 13': 653. 1852. Assigned 

 doubtfully to Mexico. 



Cestrum ehrenbeegii Dunal in DC. Prodr. 13': 613. 1852. Type from 

 Chapultepec. 



Cesteum multinhrvium Dunal in DC. Prodr. 13': 611. 1852. Type collected 

 between Tula and Tampico. 



Cestrum propinqxjum Mart. & Gal. Bull. Acad. Brux 12': 147. 1845. Type 

 from Jalapa, Veracruz. 



4. SWARTZIA Gmel. Syst. Nat. 2: 360. 1791. 



Shrubs, often scandent ; leaves entire ; flowers large, white or yellow ; calyx 

 tubular, 2 to 5-lobate; corolla funnelform, the lobes broad, imbricate, spread- 

 ing in anthesis; stamens 5, the filaments filiform; fruit baccate, 2-celled. 



Calyx and lower surface of leaves tomentose or pubescent 1. S. guttata. 



Calyx and leaves glabrous 2. S. nitida. 



