656 CONTEIBUTIONS FROM THE NATIONAL, HERBARIUM. 



Ovary l-celled. 



Fruit large, more than 2 cm. long; leaves simple. 

 Receptacle of the fruit enlarged and fleshy ; drupe reniform, compressed. 



4. ANACABDIUM. 



Receptacle not enlarged ; drupe ovoid, not compressed 5. MANGIFERA. 



Fruit comparatively small, rarely over 1 cm. long ; leaves usually compound, 

 sometimes simple. 



Petals none 6, PISTACIA. 



Petals present. 



Stamens twice as many as the petals. 



Fruit globose; petals deciduous 7. SCHINUS. 



Fruit compressed; petals deciduous 14. PACHYCORMTJS. 



Stamens as many as the petals. 

 Pericarp not separating from the mature fruit. 



Calyx in fruit acci'escent and winglike 8. ASTRONIUM. 



Calyx not .accrescent. 

 Flowers 3 or 4-parted ; leaflets usually dentate or sinuate. 



9. COMOCLADIA. 

 Flowers 5-parted; leaflets entire. 



Leaflets long-petiolulate ; flowers polygamous. 



10. METOPIUM. 

 Leaflets nearly sessile; flowers dioecious, 



11. MOSQUITOXYLUM. 

 Pericarp separating easily from the fruit when dry. 

 Fruit strongly compressed, flat, broader than long, glabrous. 



12. PSEUDOSMODINGIUM. 



Fruit not compressed or only slightly so, usually as long as broad, 



pilose or sometimes glabrous 13. RHUS. 



1. SPONDIAS L. Sp. PI. 371. 1753. 



Trees or shrubs; leaves large, pinnate, deciduous, the leaflets unequal at 

 base ; flowers small, pedicellate, paniculate, polygamous ; sepals 4 or 5 ; petals 

 4 or 5, oblong-ovate, acute, spreading, valvate ; stamens 8 or 10 ; fruit a drupe 

 with large, usually 5-celled stone. 



Leaflets acute to rounded at apex, mostly 2 to 5 cm. long ; panicles mostly 2 to 4 

 cm. long 1. S. mombin. 



Leaflets abruptly obtuse-acuminate, mostly 6 to 10 cm. long ; panicles usually 15 

 to 30 cm. long 2. S. lutea. 



1. Spondias mombin L. Sp. PI. 371. 1753. 



Spondias purpurea L. Sp. PI. ed. 2. 613. 1762. 



Spondias mexicana S. Wats. Proc. Amer. Acad. 22: 403. 1887. 



Sinaloa and Jalisco to Yucatan and Chiapas. Widely distributed in tropical 

 America. 



Shrub or tree, sometimes 10 meters high, with thick branches; bark smooth, 

 grayish or white; leaflets 5 to 12 pairs, often subsessile, very variable in 

 shape, pubescent when young but soon glabrate; petals purple, 3 mm. long; 

 fruit 2 to 3 cm. long, usually purplish. " Ciruela " (the fruit; Spanish word 

 for "plum"), " ciruelo " (the tree; Guerrero, Jalisco, YucatS-n, Central 

 America, etc.) ; " chiabal" (Yucatfln) ; " ciruela agria," " ciruela roja," " ciruela 

 colorada," "ciruela de Mexico," "ciruela del pals" (various localities) ; " jobo," 

 "hobo," or " xobo " (Morelos, Guerrero, Veracruz, Colombia, Santo Domingo, 

 Porto Rico) ; " biaxhi " (Oaxaca, Zapotec, Reko) ; " jocote " (Oaxaca, etc., Cen- 



