STANDLEY TREES AND SHRUBS OF MEXICO. 393 



1. Pithecollobium macrosiphon Standi. Contr. U. S. Nat. Herb. 20: 191. 1919. 

 Known only from the type locality, between Tumbala and El Salto, Chiapas. 

 Spiny tree ; leaflets 4 to 6 cm. long, obtuse. 



2. Pithecollobium lanceolatum (Humb. & Bonpl.) Benth. Lond. Journ. Bot. 



5: 105. 1846. 

 Mimosa Ugustrina Jacq. Fragm. Bot. Illustr. 29. pi. 32, f. 6. 1809. Not M. 



ligustrina Vahl, 1807. 

 Inga lanceolata Humb. & Bonpl. ; Willd. Sp. PI. 4: 1005. 1806. 

 Pithecollobium ligustrinum Klotzsch ; Benth. Trans. Linn. Soc. Bot. 30: 571. 



1875. 

 Sinaloa to Chiapas, Veracruz, and Tabasco; reported from San Luis Potosf. 

 Central America and northern South America ; type from Cumanit, Venezuela. 



Tree 3.5 to 5 meters high or larger, armed with short stout spines ; pinnae 

 one pair, the leaflets one pair, oblique, 3.5 to 8 cm. long, obtuse, bright green, 

 thick, glabrate ; flowers small, white ; fruit terete, about 10 cm. long. 

 " Tirauche " (Michoacan, Guerrero); " tucuy " (Tabasco, San Luis PotosI) ; 

 "piehejumo" (San Luis Potosi) ; " conchi " (Sinaloa); " espino," " chimi- 

 nango " (Colombia); " bobo " (Venezuela); "abracade" (El Salvador). 



3. Pithecollobium calostachys Standi. Contr. U. S. Nat. Herb. 20: 190. 1919. 

 Tamaulipas and San Luis Potosi to Tabasco and Chiapas; type from Tam- 



pico, Tamaulipas. 



Tree 4.5 to 6 meters high or larger. 



This has been referred commonly to the preceding species but seems specifi- 

 cally distinct by the characters given in the key. 



4. Pithecollobium dulce (Roxb.) Benth. Lond. Journ. Bot. 3: 199. 1844. 

 Mimosa dulcis Roxb. PI. Coromand. 1: 67. pi. 99. 1795. 



Acacia oWiqitifolia Mart. & Gal. Bull. Acad. Brux. 10*: 817. 1843. 



Baja California to Chihuahua, Tamaulipas, and Chiapas; often cultivated. 

 Central America and Colombia ; naturalized in the East Indies and elsewhere 

 in the tropics of the Old World ; type from Coromandel. 



Tree. 4.5 to 20 meters high or larger, very spiny ; trunk often 60 to 80 cm. in 

 diameter, the bark grayish ; pinnae one pair, the leaflets one pair, 2.5 to 5 cm. 

 long or larger, obtuse, pale green, glabrate ; flowers yellowish or greenish 

 white ; fruit long and narrow, reddish, pubescent, much coiled and twisted ; 

 seeds black, surrounded by a white or reddish aril; wood moderately heavy, 

 flexible, strong, reddish brown. " Huamfiehil," "cuamuchil," or " guamfichil " 

 (used widely in Mexico; from the Nahuatl names, which are given variously as 

 Quaumochtli, quauhmochitl. coacamachalU, or quamochitl) ', " guamfichitl," 

 " guamuche," " humo " (Tamaulipas); " guaymachile " (Guerrero, Palmer); 

 " guamachi " (Guerrero); " pinzan " (Gueri-ero, Oaxaca, Veracruz); " cuam<5- 

 chil," " huamtjchil costeno," "guamuche," " huanKiche," "muchite" (Oaxaca); 

 " yaga-bixihui," " yaga-biguichi " (Oaxaca, Zapotee, Reko) ; " giiamuchil " (Du- 

 rango. Patoni) ; " buamtichil " (Alcocer) ; "espino de playa " (Nicaragua); 

 " mochigiliste " (Costa Rica); " guachimole," " raongoUano " (El Salvador); 

 "jaguay" (Guatemala); " inga " (Cuba); "camachile" (Guam, Philippines). 



It is of interest to note that the Nahuatl name was introduced, along with 

 the plant itself, into Guam and the Philippines by the Spaniards. The word 

 has been modified there into such forms as " camanchil," " camonsil," " kama- 

 chiles," and " camachile." From the Philippines the tree was carried to India, 

 where it is now much planted. The pods are known in India as " Manila 

 tamarinds." 



The tree is very resistant to drought. It is nearly evergreen, but loses its 

 old leaves as the new ones appear. The wood is widely employed for general 



