STANDLEY — TREES AND SHRUBS OF MEXICO. 639 



Jatropha canescens Muell. Arg. in DC. Prodr. 15": 1079. 1866. 



Dry plains and liillsides, Baja California, Sonora, and Sinaloa. 



Shrub or small tree, 1 to 6 meters high, with brown or whitish bark ; leaves 

 2 to 7 cm. wide, more or less cordate at base, entire or somewhat undulate ; 

 flowers pinkish; capsule 2 t© 2.5 cm. wide. " Sangregrado " (Sinaloa, Sonora) ; 

 " sangre en grado " (Sonora); " lomboi " (Baja California); " torotito " 

 (Sonora). 



A decoction is employed as a mordant in dyeing. The juice is astringent and 

 is used as a remedy for warts and sore throat, and for hardening the gums. 



24. Jatropha cercidiphylla Standi., sp. nov. 



Type collected between San Luis PotosI and Tampico {Palmer 1140; U. S. 

 Nat. Herb. no. 42743) ; also in the Tres Marias Islands, Tepic. 



Stipules linear-lanceolate, entire, persistent ; petioles slender, 4 to 8 mm. long, 

 inserted above the base of the blade ; leaf blades orbicular to reniform, some- 

 times flabellate-orbicular, 1 to 2.3 cm. long, 1 to 2.7 cm. wide, broadly rounded 

 or shallowly emarginate at apex, rounded or subcordate at base, subcoriaceous, 

 glabrous or nearly so, glaucescent beneath, the venation conspicuous and reticu- 

 late; pistillate flowers axillary, solitary, the pedicels 1.5 to 6 cm. long; capsule 

 glabrous, about 1 cm. long; seeds 4 to 5 mm. long, brown, rugulose. 



25. Jatropha platyphylla Muell. Ai-g. in DC. Prodr. 15==: 1077. 1866. 

 Sinaloa to Michoacfln. 



Shrub, nearly glabrous ; leaves 15 to 35 cm. broad, glaucous beneath, with 

 short rounded lobes ; seeds about 12 mm. long. " Sangregrado." 

 Sometimes cultivated as a hedge plant. 



26. Jatropha olivacea Muell. Arg. Linnaea 34; 207, 1865. 

 Mexico to Oaxaca ; type from San Juan del Estado, Oaxaca. 



About a meter high, nearly glabrous ; leaves 5 to 7 cm. long, 3 or 5-lobate ; 

 coroUa about 8 mm. long. 



27. Jatropha alamani ^ Muell. Arg. Linnaea 34: 207. 1865. 

 Known only from the type locality, Tehuantepec, Oaxaca. 



Trunk 2.5 to 3 meters high ; leaves 10 cm. wide, 5-lobate, cordate at base, 

 puberulent. 



28. Jatropha synapetala Standi. & Blake, Proc. Biol. Soc. Washington 33: 188. 

 1920. 



Type from Playa de Coyula, Oaxaca. 



Tree; leaves petiolate, obovate, 7 to 9 cm. long, rounded at apex, cuneate 

 at base, glabrous, glaucescent beneath ; cymes shorter than the leaves, hispidu- 

 lous, long-pedunculate, the flowers red ; corolla 8 mm. long. " Pinoncillo. " 



29. Jatropha gaumeri Greenm. Field Mus. Bot. 2: 256. 1907. 

 Yucatan ; type from Izamal. 



Shrub or tree, 3 to 10 meters high, the ,trunk sometimes 50 cm. in diameter ; 

 leaves of medium size, broadly cordate, usually cuspidate-acuminate, glabrous 

 or nearly so. " Pomolchg." 



Branches sometimes used for making whistles. This has been reported 

 from Yucatan as Ficns jaUscana and as Jacaratia niexicana. 



' The species is named in honor of Lucas Alam^n (1792-1853), who was born 

 at Guanajuato. He studied under Cervantes, and traveled for some time in 

 Europe. He forwarded notes and botanical specimens to De CandoUe, and is 

 said to have been well informed upon botanical subjects. He is best known for 

 his literary and historical publications. 



